Part 7 - UNC Herbarium

POACEAE 910
* Phyllostachys nigra (Loddiges) Munro, Black Bamboo. Pd (SC), Cp (VA): cultivated as an ornamental, persistent or
spreading from plantings; rare, native of China and Japan. [= K, Y, Z]
* Phyllostachys rubromarginata McClure. Pd (SC): cultivated as an ornamental, persistent or spreading from plantings;
rare, native of China. [= K, Y, Z]
* Phyllostachys meyeri McClure is reported as introduced in NC and SC (Kartesz 1999). {investigate} [= K] {not keyed at
this time}
A number of other species are sometimes cultivated in our area, and may be encountered. Bamboos are seriously underrepresented
in herbaria, since they rarely flower and are impractical to press. All of the species above should be anticipated in
other physiographic provinces and states than those listed.
Piptatherum Palisot de Beauvois
1 Leaves involute when dry, 1-2 mm wide; glumes 3.5-4.8 mm long ................................................................... [P. canadense]
1 Leaves flat, 5-15 mm wide; glume 6-9 mm long.
2 Leaves primarily basal or low-cauline, 2-4 (-5) dm long, 4-10 mm wide; inflorescence a raceme or a racemiform
panicle; culms prostrate, the upper leaves very reduced, often merely bladeless sheaths .........[see Oryzopsis asperifolia]
2 Leaves primarily cauline, 1-2.5 dm long, 8-15 mm wide; inflorescence a panicle; culms erect, the upper leaves welldeveloped.....................................................................................................................................................
P. racemosum
Piptatherum racemosum Ricker ex A.S. Hitchcock, Blackseed Ricegrass. Mt (VA): calcareous woodlands and forests;
common. Québec and Ontario west to ND, south to w. VA, KY, MO, and NE. [= K; = Oryzopsis racemosa (Smith) Ricker ex
A.S. Hitchcock – C, F, G, HC, W]
Piptatherum canadense (Poiret) Barkworth ined., Mountain Ricegrass, ranges south to Panther Knob, Pendleton County,
WV; it may occur in our primary area as well. [= K; = Oryzopsis canadensis (Poiret) Torrey – C, F, G, HC]
* Piptatherum miliaceum (Linnaeus) Cosson, Smilo Grass, is reported as an introduction in MD, NJ, and PA (Kartesz 1999).
[= K; = Oryzopsis miliacea (Linnaeus) Bentham & Hooker – HC; = Agrostis miliacea Linnaeus] {not keyed at this time}
Piptatherum pungens (Torrey ex Sprengel) Barkworth ined. ranges south to e. PA (Rhoads & Klein 1993), NJ, and WV
(Kartesz 1999). [= K; = Oryzopsis pungens (Torrey ex Sprengel) A.S. Hitchcock – C, F, G, HC] {not keyed at this time}
Piptochaetium J. Presl (Needlegrass)
A genus of about 36 species, of temperate North and South America, and montane tropical South America (Cialdella & Giussani
2002). P. avenacioides (Nash) Valencia & Costa, endemic to FL, is the only other species in the genus in eastern North America.
References: Cialdella & Giussani (2002).
Piptochaetium avenaceum (Linnaeus) Parodi, Eastern Needlegrass, Black Oatgrass. Cp, Pd, Mt (GA, NC, SC, VA):
upland woodlands and forests, sometimes abundant or even dominant in xeric woodlands over granitic or mafic rocks in the
Piedmont; common (uncommon in the Mountains). April-June. [= C, K; = Stipa avenacea Linnaeus – RAB, F, G, HC, S, W]
Pleioblastus Nakai 1925
* Pleioblastus simonii (Carrière) Nakai. Reported for GA (Kartesz 1999). {investigate} [= Arundinaria simonii (Carrière)
A.& C. Rivière – K]
Poa Linnaeus 1753 (Bluegrass)
A genus of about 500 species, cosmopolitan. References: Tucker (1996)=Z; Haines (2004)=Y; Soreng (1998).
1 Plants with well-developed rhizomes; perennial.
2 Upper stems strongly flattened; [section Tichopoa].......................................................................................P. compressa
2 Upper stems terete or nearly so.
3 Lower nodes of the panicle with 1-3 branches........................................................................................ P. cuspidata
3 Lower nodes of the panicle with 4 or more branches; [section Poa]........................................................ P. pratensis
1 Plants lacking rhizomes; perennial or annual.
4 Plants dioecious, the florests imperfect; lemmas and glumes scarious and silvery; [rare introduction in our area];
[section Dioicopoa]......................................................................................................................................P. arachnifera