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878 POACEAE/CYNODON CYNODON Rich. BERMUDA GRASS AA C4 genus of 9 species of tropical and warm areas of the Old World (Barkworth 2003e), which including pasture and lawn grasses and troublesome weeds. Recent molecular studies (Hilu & Alice 2000) indicate that Cynodon is related to Chloris and Eustachys. � All species are reported to be potentially cyanogenic because of the glucoside dhurrin, which hydrolizes to hydrocyanic acid (HCN) in the rumen of livestock (Burrows & Tyrl 2001). At least some species of Cynodon have salt glands (= specialized epidermal structures for the excretion of excess salts from leaf tissue) and are halophytic (= tolerant of salty or alkaline conditions) (Oross & Thomson 1982). (Greek: cyon, dog, and odous, tooth, from the close rows of tooth-like spikelets or the hard scales on rhizomes) (subfamily Chloridoideae, tribe Cynodonteae) REFERENCES: Harlan et al. 1969; de Wet & Harlan 1970a; Moreira 1984; Jones & Jones 1992; Barkworth 2003e. Cynodon dactylon (L.) Pers., (fingered), BERMUDA GRASS, BAHAMA GRASS, STAR GRASS. Rhizomatous and stoloniferous, mat-forming perennial 10–40(–50) cm tall; culms mostly stoloniferous, with only inflorescence-bearing shoots erect; leaf blades 1–2(–5) mm wide; leaf sheaths compressed, keeled, with tufts of hairs at summit; lower leaf sheaths also pilose on back; ligule of hairs 0.2–0.5 mm long; branches of inflorescence (2–)3–5(–9), usually digitately arranged at tip of culm, 2–6(–8) cm long; spikelets with 1 perfect awnless floret, 1.7–2.5(–3.2) mm long, closely overlapping, in 2 rows on a flattened or triangular branch; disarticulation above the subequal glumes. Cultivated in TX since about 1882 for pasture and lawns (Mahler 1988), also a common weed throughout TX on roadsides, disturbed areas, gardens, and moist habitats; sw Canada (B.C.) and throughout most of the U.S. May–Oct. Native probably of Africa, but India has also been suggested (not from Bermuda, despite the common name). [Capriola dactylon (L.) Kuntze] This species was introduced to Georgia in 1751 and within 50 years was widespread in the e and se U.S. (Tellman 1997). It is an important cause of hay fever and is potentially poisonous to livestock due to the production of hydrocyanic acid under certain environmental conditions; it is also reported to cause photosensitization, staggers syndrome, and acute respiratory distress syndrome (ARDS) in livestock. The staggers syndrome (tremors, “head bob,” head shaking, incoordination) may result from ergot-type alkaloids (see further discussion under Paspalum). ARDS (a pneumonia-like condition sometimes referred to as “fog fever”) has affected cattle in East TX in spring and is apparently linked to a change in food (e.g., movement to a lush pasture) and an associated abrupt increase of l-tryptophan in the rumen of unaccustomed animals—this is converted to a toxin which causes pulmonary emphysema and edema (Lewis & Elvin-Lewis 1977; Fuller & McClintock 1986; Burrows & Tyrl 2001; Hart et al. 2001). BERMUDA GRASS is viewed as one of the world’s worst weeds by some authorities (Holm et al. 1977) and affects a variety of crops including corn, cotton, and sugarcane (Holm et al. 1977; Moreira 1984). It is considered to be a noxious weed in AZ, CA, and UT (Kartesz 1999). However, BERMUDA GRASS is the most commonly used tropical lawn grass (Clayton & Renvoize 1986) and is one of the most important lawn and forage grasses in East TX. Improved hybrid strains are widely planted as pasture grasses; the species is salt- and alkali-tolerant (Hatch et al. 1999). � � I CYNOSURUS L. DOG-TAIL GRASS AAn Old World C3 genus of 8 species (Barkworth ined.) native to Europe, Asia, and Africa. Some species are used for pasture, hay, lawns, or playing fields; � others are considered serious weeds (Watson & Dallwitz 1999). (Greek: cynos, dog and oura, tail, referring to the shape of the panicle) (subfamily Pooideae, tribe Poeae) REFERENCES: Tutin 1980; Tucker 1996; Yatskievych 1999; Thomas 2002; Barkworth ined. Cynosurus echinatus L. (prickly), BRISTLY DOG-TAIL GRASS, SPINY DOG-TAIL GRASS, HEDGEHOG DOG-TAIL, ROUGH DOG-TAIL. Glabrous annual; flowering culms 30–60(–90) cm tall, ascending;
ILLUSTRATED FLORA OF EAST TEXAS 879 Chloris verticillata [USB] Chloris virgata [HI1] Cinna arundinacea [USB] Coelorachis cylindrica [HI1] Coelorachis rugosa [HI1, USB] Coix lacryma-jobi [HI1] Cortaderia jubata [JEP] Cortaderia selloana [EN2] Ctenium aromaticum [HI1]
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KEYS TO THE VASCULAR PLANTS 309 KEY
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KEY TO FERNS AND SIMILAR PLANTS 311
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Key to Families of Gymnosperms KEY
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20. Flowers in a single, small (4-4
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38. Stamens 6 per flower. 39. Peria
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57. Leaves reduced to scales only;
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FERNS AND SIMILAR PLANTS (PTERIDOPH
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ISOETES/ISOETACEAE 323 DIVISION LYC
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Psilotum nudum [KNO] Isoetes butler
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LYCOPODIELLA/LYCOPODIACEAE 327 Beit
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SELAGINELLA/SELAGINELLACEAE 329 Pse
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ILLUSTRATED FLORA OF EAST TEXAS 331
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Palhinhaea cernua [CLU] Selaginella
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leaf blade petiole rhizome root sca
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ASPLENIUM L. SPLEENWORT ASPLENIUM/A
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WOODWARDIA/BLECHNACEAE 339 1. Plant
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MEGASPORE Woodwardia areolata [LUN]
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DRYOPTERIDACEAE 343 AThe family as
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Anemia mexicana Azolla caroliniana
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DRYOPTERIS/DRYOPTERIDACEAE 347 Carr
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WOODSIA/DRYOPTERIDACEAE 351 Tectari
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MARSILEA/MARSILEACEAE 353 etation (
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BOTRYCHIUM/OPHIOGLOSSACEAE 357 REFE
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Nephrolepis exaltata Onoclea sensib
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OPHIOGLOSSUM/OPHIOGLOSSACEAE 361 Op
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PTERIDACEAE 365 and pous or podium,
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Botrychium virginianum Ophioglossum
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CERATOPTERIS/PTERIDACEAE 371 Astrol
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Argyrochosma dealbata [LUN] Astrole
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Cheilanthes feei [LUN] Cheilanthes
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Astrolepis integerrima Astrolepis s
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SALVINIACEAE 379 fern, derived from
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SALVINIA/SALVINIACEAE 381 NM, and N
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Pellaea ovata Pellaea wrightiana IL
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Thelypteris dentata [SM3] STERILE F
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GYMNOSPERMS EPHEDRACEAE 389 AThe te
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DIVISION PINOPHYTA CONIFERS CUPRESS
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JUNIPERUS/CUPRESSACEAE 393 allergen
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Ephedra antisyphilitica [LUN] Junip
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PINUS/PINACEAE 397 clusters at the
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� � � � � � Pinus echin
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Ephedra antisyphilitica Juniperus a
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MAGNOLIOPHYTA 403 consumed in large
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CLASS MONOCOTYLEDONAE MONOCOTYLEDON
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AGAVACEAE 407 produced in North Ame
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HESPERALOE/AGAVACEAE 409 for their
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Acorus calamus [GLE] Hesperaloe eng
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YUCCA/AGAVACEAE 413 snakebite (Verh
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7. Leaves straight or nearly so, la
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Manfreda virginica subsp. lata [HEA
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Manfreda maculosa Manfreda sileri I
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ALISMA/ALISMATACEAE 423 1. Pistils
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Yucca rupicola [LYN] Yucca treculea
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SAGITTARIA/ALISMATACEAE 427 long te
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Echinodorus tenellus [FLN, RHO] Sag
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Yucca treculeana ILLUSTRATED FLORA
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ALLIUM/ALLIACEAE 433 pounds are ant
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ALLIUM/ALLIACEAE 435 Allium ampelop
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STAMENS ILLUSTRATED FLORA OF EAST T
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CAPSULE Allium canadense var. mobil
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var. fraseri-▲ var. hyacinthoides
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AMARYLLIDACEAE 443 and edible (Baye
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COOPERIA/AMARYLLIDACEAE 445 REFEREN
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BULBILS CAPSULE Allium sativum [ANO
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HABRANTHUS/AMARYLLIDACEAE 449 obser
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CAPSULES SEED Habranthus tubispathu
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LYCORIS/AMARYLLIDACEAE 455 usually
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Hymenocallis liriosme [HEA] Leucoju
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Narcissus jonquilla [NIC] Narcissus
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ANTHERICACEAE 461 2000), Anderson,
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ARACEAE 463 hemiepiphytes, and aqua
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ARISAEMA/ARACEAE 465 has been disag
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ORONTIUM/ARACEAE 469 down the insid
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Echeandia flavescens [MCV] Colocasi
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ARECACEAE 473 oped rhizomes present
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ASPARAGACEAE 475 spreading from cul
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BROMELIACEAE 477 jointed pedicels;
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Xanthosoma sagittifolium [BA1] Saba
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APTERIA/BURMANNIACEAE 481 FAMILY RE
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S. minor � S. mexicana-� ILLUST
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UVULARIA/COLCHICACEAE 485 blurred,
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ANTHER CAPSULE PISTIL Apteria aphyl
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CALLISIA/COMMELINACEAE 489 the Haem
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COMMELINA/COMMELINACEAE 491 4. Spat
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SINGLE FLOWER INFLORESCENCE Callisi
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TRADESCANTIA/COMMELINACEAE 495 & Tv
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FRUITING INFLORESCENCE Murdannia nu
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Tradescantia paludosa [AND] Tradesc
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CYPERACEAE 507 become split by grow
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CYPERACEAE 509 10. Scales of spikel
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BULBOSTYLIS/CYPERACEAE 511 1. Spike
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CAREX/CYPERACEAE 517 The following
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CAREX/CYPERACEAE 519 of leaf sheath
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CAREX/CYPERACEAE 521 37. Perigynia
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CAREX/CYPERACEAE 523 58. Achene sho
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CAREX/CYPERACEAE 525 85. Larger per
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Carex abscondita [MAC] Carex albica
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CAREX/CYPERACEAE 531 persists in li
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Carex decomposita [MAC] Carex digit
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Carex triangularis [MAC] Carex tetr
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CYPERUS/CYPERACEAE 559 1974; Baijan
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CYPERUS/CYPERACEAE 561 21. Leaf bla
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CYPERUS/CYPERACEAE 563 fresh; achen
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CYPERUS/CYPERACEAE 565 tively more
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CYPERUS/CYPERACEAE 573 Cyperus invo
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Cyperus esculentus [REE] Cyperus fi
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CYPERUS/CYPERACEAE 577 around the s
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Cyperus iria [GWO] Cyperus lanceola
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Cyperus surinamensis [BT2] Cyperus
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ELEOCHARIS/CYPERACEAE 587 5. Culms
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ELEOCHARIS/CYPERACEAE 589 27. Spike
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ELEOCHARIS/CYPERACEAE 591 43. Scale
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ELEOCHARIS/CYPERACEAE 593 compressa
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ELEOCHARIS/CYPERACEAE 601 ing mats;
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FIMBRISTYLIS Vahl FIMBRY FIMBRISTYL
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Fimbristylis annua [SID] Fimbristyl
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REFERENCES: Coville 1890; Bush 1905
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RHYNCHOSPORA/CYPERACEAE 621 Lipocar
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RHYNCHOSPORA/CYPERACEAE 623 10. Per
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RHYNCHOSPORA/CYPERACEAE 625 34. Cul
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Lipocarpha aristulata [GWO] Lipocar
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SCHOENOPLECTUS/CYPERACEAE 641 exten
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Schoenoplectus pungens [MAS] Schoen
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SCLERIA/CYPERACEAE 649 5. Lowest la
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SCLERIA/CYPERACEAE 651 with a pair
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ERIOCAULON/ERIOCAULACEAE 657 1. Pet
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ERIOCAULON/ERIOCAULACEAE 659 bracts
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� Dioscorea bulbifera [HEB] ILLUS
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HYACINTHACEAE 663 orange zone towar
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Scleria pauciflora ILLUSTRATED FLOR
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� � ILLUSTRATED FLORA OF EAST T
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SCHOENOLIRION/HYACINTHACEAE 669 som
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HYDROCHARITACEAE 671 AA small (116
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HYDRILLIA/HYDROCHARITACEAE 673 marg
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OTTELIA Pers. DUCK-LETTUCE OTTELIA/
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� Vallisneria americana [LAM] Ott
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IRIDACEAE 683 inflorescences with 1
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BELAMCANDA Adans. LEOPARD-LILY, BLA
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IRIS/IRIDACEAE 691 6. Cauline leaf
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Iris brevicaulis [YAT] ILLUSTRATED
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SISYRINCHIUM/IRIDACEAE 697 3. Inflo
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Sisyrinchium ensigerum [CUR] Sisyri
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JUNCUS/JUNCACEAE 703 mainly in wet
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JUNCUS/JUNCACEAE 705 yellowish, lea
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Juncus acuminatus [MAS] Juncus anth
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Juncus dichotomus [GWO] Juncus effu
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Juncus polycephalus [GWO] Juncus re
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var. validus-● var. facinatus-�
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LEMNA/LEMNACEAE 721 Pineywoods and
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SPIRODELA/LEMNACEAE 723 Lemna turio
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NOTE 3 VEINS � TOP VIEW Lemna min
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LILIACEAE 729 The lily family (even
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ERYTHRONIUM/LILIACEAE 731 17. Tepal
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Wolffia columbiana [GWO, MIB] Wolff
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LIMNOCHARITACEAE 735 1. Perianth wh
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THALIA/MARANTACEAE 737 pollen prese
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MELANTHIACEAE 739 AA small family (
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Lilium philippinense [GCH] SEED FOL
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VERATRUM/MELANTHIACEAE 745 circumsc
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Zigadenus glaberrimus [GLE] Schoeno
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ALETRIS/NARTHECIACEAE 749 Tofieldia
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DASYLIRION Zucc. SOTOL, SHAGGY-LILY
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FLOWER Aletris aurea [CO1] Aletris
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ORCHIDACEAE 755 45 occur in East TX
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CALOPOGON/ORCHIDACEAE 757 5-25 flow
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CLEISTES/ORCHIDACEAE 759 long; lip
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CYPRIPEDIUM/ORCHIDACEAE 761 while t
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Stenanthium gramineum Toxicoscordio
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Calopogon tuberosus [FNA] Corallorh
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HEXALECTRIS/ORCHIDACEAE 767 rain. A
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Habenaria quinqueseta [LUN] Habenar
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PLATANTHERA/ORCHIDACEAE 771 PLATANT
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PLATANTHERA/ORCHIDACEAE 773 Platant
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SPIRANTHES/ORCHIDACEAE 779 mm wide,
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SPIRANTHES/ORCHIDACEAE 781 12. Lip
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Platanthera lacera [YAT] Pogonia op
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SPIRANTHES/ORCHIDACEAE 789 narrowes
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TRIPHORA/ORCHIDACEAE 791 an example
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LEAF collar rhizome blade ligule sh
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POACEAE 797 Dissection is usually n
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POACEAE 799 rower and often differe
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POACEAE 801 6. Lemmas awned, the tw
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POACEAE 803 30. Lemma veins none to
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POACEAE 805 13. Inflorescences narr
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POACEAE 807 12. Lemma awnless; infl
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POACEAE 809 inflorescence solitary,
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POACEAE 811 29. Spikelets loosely a
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POACEAE 813 20. Basal leaves usuall
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AEGILOPS/POACEAE 815 23. Spikelets
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AGROSTIS/POACEAE 817 Agrostis hyema
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ANDROPOGON/POACEAE 821 colonizing e
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ANTHENANTIA/POACEAE 825 to be the e
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Page 521 and 522: ARISTIDA/POACEAE 829 9. Lemma thick
Page 523 and 524: ARISTIDA/POACEAE 831 BRIT), Newton
Page 527 and 528: Anthoxanthum aristatum [BB2] Anthox
Page 531 and 532: AXONOPUS/POACEAE 839 duced to the U
Page 533 and 534: Avena fatua [HI1] Arundo donax [LYN
Page 535 and 536: BOTHRIOCHLOA/POACEAE 843 var. barbi
Page 537 and 538: Aristida purpurea (all vars.) ILLUS
Page 539 and 540: Axonopus compressus [HI1] Axonopus
Page 541 and 542: BOUTELOUA/POACEAE 849 state grass b
Page 543 and 544: Bothriochloa ischaemum var. songari
Page 547 and 548: Bouteloua pectinata [BOT, HEA] Bout
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Page 565 and 566: Chasmanthium sessiliflorum [USB] Ch
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Page 573 and 574: DANTHONIA/POACEAE 881 Dactylocteniu
Page 575 and 576: Cynodon dactylon [REE] Cynosurus ec
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Page 583 and 584: Danthonia spicata [USB] Desmazeria
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Page 591 and 592: Dichanthelium acuminatum (all vars.
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Page 601 and 602: DIGITARIA/POACEAE 909 2. Main axis
Page 603 and 604: Dichanthelium sphaerocarpon [HI] IL
Page 605 and 606: DIGITARIA/POACEAE 913 with papilla-
Page 607 and 608: Digitaria bicornis [HEB] ILLUSTRATE
Page 611 and 612: Digitaria insularis [HI1] Digitaria
Page 613 and 614: EHRHARTA/POACEAE 921 spikelets (2.5
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Page 619 and 620: Echinochloa crus-gali [REE] Echinoc
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ENTEROPOGON Nees UMBRELLA GRASS ENT
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ERAGROSTIS/POACEAE 931 8. Infloresc
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ERAGROSTIS/POACEAE 933 12. Pedicels
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Elymus repens [HI1] Elymus smithii
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Eragrostis japonica [USB] ILLUSTRAT
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ERIONEURON/POACEAE 945 Shaw and Sme
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� � � ILLUSTRATED FLORA OF EA
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FESTUCA/POACEAE 951 rachilla glabro
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GYMNOPOGON/POACEAE 955 Glyceria sep
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HILARIA/POACEAE 957 REFERENCES: Eme
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ILLUSTRATED FLORA OF EAST TEXAS Fes
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KOELERIA/POACEAE 963 Andropogoneae,
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Heteropogon melanocarpus [HI1] Hord
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LEPTOCHLOA/POACEAE 967 Leersia oryz
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ILLUSTRATED FLORA OF EAST TEXAS Koe
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ILLUSTRATED FLORA OF EAST TEXAS Hor
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LOLIUM/POACEAE 973 Charmet et al. 1
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Leptochloa nealleyi [USB] Lolium ri
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MICROSTEGIUM/POACEAE 977 AA variabl
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ILLUSTRATED FLORA OF EAST TEXAS Lep
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Lolium temulentum [USB] Melica muti
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MUHLENBERGIA/POACEAE 983 10. Lemma
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MUHLENBERGIA/POACEAE 985 and Prairi
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ILLUSTRATED FLORA OF EAST TEXAS Mon
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ILLUSTRATED FLORA OF EAST TEXAS Mic
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ILLUSTRATED FLORA OF EAST TEXAS Muh
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PANICUM/POACEAE 993 fact that gener
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PANICUM/POACEAE 995 17. Spikelets 2
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Oryza sativa [HI1] Panicum anceps [
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ILLUSTRATED FLORA OF EAST TEXAS Muh
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PANICUM/POACEAE 1001 Panicum hallii
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Panicum trichoides [HI2] ILLUSTRATE
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PASPALUM/POACEAE 1009 5. Spikelets
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PASPALUM/POACEAE 1011 27. Axils of
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Panicum virgatum [RCA] Paspalum acu
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PASPALUM/POACEAE 1019 loam soils; w
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PENNISETUM/POACEAE 1025 unit as in
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Paspalum repens [USB] ILLUSTRATED F
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PHALARIS/POACEAE 1029 landscapes (B
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Paspalum pubiflorum (both vars.) IL
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Pennisetum purpureum [HUT] Penniset
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POA/POACEAE 1035 around awn base; l
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POA/POACEAE 1037 long. Forests, flo
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SACCHARUM/POACEAE 1045 1. Awn of le
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SCHEDONNARDUS/POACEAE 1047 lower gl
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Page 743 and 744:
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SETARIA/POACEAE 1053 Paspalidium (W
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SETARIA/POACEAE 1055 14. Leaf blade
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Schizachyrium tenerum [HI1, USB] Sc
Page 751 and 752:
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SORGHUM/POACEAE 1063 2000) indicate
Page 757 and 758:
SPARTINA/POACEAE 1065 Americas it [
Page 759 and 760:
Sorghastrum elliottii [HI1] Sorghas
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Page 763 and 764:
SPOROBOLUS/POACEAE 1071 7. Lemma ap
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STEINCHISMA/POACEAE 1075 Sporobolus
Page 769 and 770:
Sphenopholis obtusata (both vars.)
Page 771 and 772:
Sporobolus neglectus [HI1] Sporobol
Page 773 and 774:
TRICHONEURA/POACEAE 1081 guish it f
Page 775 and 776:
Stenotaphrum secundatum [USB] Trich
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Page 779 and 780:
Page 781 and 782:
TRISETUM/POACEAE 1089 low areas; ne
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UROCHLOA/POACEAE 1091 AA C4 genus o
Page 785 and 786:
Page 787 and 788:
Tridens eragrostoides Tridens flavu
Page 789 and 790:
VULPIA/POACEAE 1097 2. Lemmas (exce
Page 791 and 792:
Page 793 and 794:
Page 795 and 796:
ZIZANIOPSIS/POACEAE 1103 (1999) (po
Page 797 and 798:
Page 799 and 800:
EICHHORNIA/PONTEDERIACEAE 1107 REFE
Page 801 and 802:
Zoysia japonica [HOL] Zoysia pacifi
Page 803 and 804:
POTAMOGETON/POTAMOGETONACEAE 1111 1
Page 805 and 806:
POTAMOGETON/POTAMOGETONACEAE 1113 P
Page 807 and 808:
Page 809 and 810:
Page 811 and 812:
SMILAX/SMILACACEAE 1119 times woody
Page 813 and 814:
SMILAX/SMILACACEAE 1121 30(-60) mm
Page 815 and 816:
Stuckenia pectinata [MAS] ILLUSTRAT
Page 817 and 818:
Page 819 and 820:
THEMIDACEAE 1127 cover for various
Page 821 and 822:
Smilax rotundifolia [JEM] ILLUSTRAT
Page 823 and 824:
TRILLIUM/TRILLIACEAE 1131 Schilling
Page 825 and 826:
TRILLIUM/TRILLIACEAE 1133 taxonomic
Page 827 and 828:
Triantha racemosa [GLE] Trillium lu
Page 829 and 830:
TYPHA/TYPHACEAE 1137 REFERENCES: Wi
Page 831 and 832:
XYRIS/XYRIDACEAE 1139 cone-like spi
Page 833 and 834:
XYRIS/XYRIDACEAE 1141 11. Plant bas
Page 835 and 836:
Sparganium americanum Typha latifol
Page 837 and 838:
Typha domingensis[ BT3] Typha latif
Page 839 and 840:
Xyris drummondii [SID] Xyris fimbri
Page 841 and 842:
Xyris smalliana [SID] ILLUSTRATED F
Page 843:
Xyris caroliniana Xyris difformis (
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keys to the vascular plants of east texas - Botanical Research ...

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