References - Botanical Research Institute of Texas

1508 LITERATURE CITED/SEMPLE ET AL.
SEMPLE, J.C., S.B. HEARD, and C.S. XIANG. 1996. The Asters of
Ontario (Compositae: Astereae): Diplactis Raf., Oclemena
Greene, Doellingeria Nees and Aster L. (including
Canadanthus Nesom, Symphyotrichum Nees and Virgulus
Raf.). Univ.Waterloo Biol. Ser. 38:1–94.
SENN, H.A.1939. The North American species of Crotalaria.
Rhodora 41:317–367.
SETTLE,W.J. and T.R. FISHER. 1970.The varieties of Silphium integrifolium.Rhodora
72:536–543.
SEXTON,C.(CHUCK). Personal communication. Wildlife Biologist,
Balcones Canyonlands National Wildlife Refuge, U.S. Fish
and Wildlife Service, Austin,TX.
SHAFFER-FEHRE, M.1991a. The enotegmen tuberculae: An
account of little-known structures from the seed coat of
the Hydrocharitoideae (Hydrocharitaceae) and Najas
(Najadaceae). J. Linn. Soc., Bot. 107:169–188.
_____. 1991b. The position of Najas within the subclass
Alismatidae (Monocotyledones) in the light of new evidence
from seed coat structures in the Hydrocharitoideae
(Hydrocharitales). J. Linn. Soc., Bot. 107:189–209.
SHAN, R.H. and L. CONSTANCE. 1951. The genus Sanicula
(Umbelliferae) in the Old World and the New. Univ. Calif.
Publ. Bot. 25:1–78.
SHARP,W.M. 1935.A critical study of certain epappose genera of
the Heliantheae-Verbesininae of the natural family
Compositae. Ann. Missouri Bot. Gard. 22:51–152.
SHARPLESS,M.R.and J.C. YELDERMAN. 1993. Introduction. In: M.R.
Sharpless and J.C. Yelderman, eds. The Texas Blackland
Prairie, land, history, and culture. Pp. xv–xvi. Baylor Univ.
Program for Regional Studies, Waco,TX.
SHAW,E.A.1987. Charles Wright on the boundary, 1849–1852,
or, Plantae Wrightianae revisited. Meckler Publishing Corp.,
Westport, CT.
SHAW,R.B.and R.D.WEBSTER. 1987.The genus Eriochloa (Poaceae:
Paniceae) in North and Central America. Sida 12:165–207.
SHERFF, E.E.1936. Revision of the genus Coreopsis. Field Mus.
Nat. Hist., Bot. Ser. 11:279–475.
_____. 1937.The genus Bidens.Publ.Field Mus.Nat.Hist.,Bot.Ser.
16:1–709.
_____ and E.J. ALEXANDER. 1955. Compositae-Heliantheae-
Coreopsidinae. N. Amer. Fl. II. 2:1–190.
SHERMAN-BROYLES, S.L.1997. Ulmus.In:Flora of North America
Editorial Committee, eds. Fl. North Amer. 3:369–376. Oxford
Univ. Press, New York and Oxford.
_____,W.T. BARKER, and L.M. SCHULZ. 1997a. Ulmaceae. In: Flora
of North America Editorial Committee, eds. Fl. North Amer.
3:368–369. Oxford Univ. Press, New York and Oxford.
_____, _____, and _____. 1997b. Celtis. In: Flora of North
America Editorial Committee, eds. Fl. North Amer.
3:376–379. Oxford Univ. Press, New York and Oxford.
SHERMAN-BROYLES, S.L., S.B. BROYLES, and J.L. HAMRICK. 1992.
Geographic distribution of allozyme variation in Ulmus
crassifolia.Syst.Bot.17:33–41.
SHETLER,S.G.and N.R. MORIN. 1986. Seed morphology in North
American Campanulaceae. Ann. Missouri Bot. Gard.
73:653–688.
SHEVIAK,C.J.1982. Biosystematic study of the Spiranthes cernua
complex. New York State Mus. Bull. 448:1–73.
SHILLING, E.E.1981. Systematics of Solanum sect. Solanum
(Solanaceae) in North America. Syst. Bot. 6:172–185.
SHINNERS, L.H.1946a. Revision of the genus Chaetopappa.
Wrightia 1:63–81.
_____. 1946b.Revision of the genus Leucelene Greene.Wrightia
1:82–89.
_____. 1946c. Revision of the genus Aphanostephus DC.
Wrightia 95–121.
_____. 1946d.Revision of the genus Kuhnia L.Wrightia 1:122–144.
_____. 1947a. Two anomalous new species of Erigeron L. from
Texas.Wrightia 1:183–186.
_____. 1947b. Revision of the genus Krigia Schreber. Wrightia
1:187–206.
_____. 1948a.The vetches and pea vines (Vicia and Lathyrus) of
Texas. Field & Lab. 16:18–29.
_____. 1948b. Geographic limits of some alien weeds in Texas.
Texas Geogr. Mag. 12:16–25.
_____. 1949a. Nomenclature of species of dandelion and
goatsbeard (Taraxacum and Tragopogon) introduced into
Texas. Field & Lab. 17:13–19.
_____. 1949b. Transfer of Texas species of Petalostemum to
Dalea (Leguminosae). Field & Lab. 17:81–85.
_____. 1949c. The genus Dalea (including Petalostemum) in
North-Central Texas. Field & Lab. 17:85–89.
_____. 1949d. Arenaria drummondii Shinners, nom. nov. Field &
Lab. 17:89.
_____. 1949e. The Texas species of Conyza (Compositae). Field
& Lab. 17:142–144.
_____. 1949f. Nomenclature of Texas varieties of Descurainia
pinnata (Cruciferae). Field & Lab. 17:145.
_____. 1949g.Transfer of Texas species of Houstonia to Hedyotis
(Rubiaeae). Field & Lab. 17:166–169.
_____. 1949h.Early plant collections return to Texas.Texas J.Sci.
1:69–70. [also published in Field & Lab. 17:66–68]
_____. 1950a. The Texas species of Thelesperma (Compositae).
Field & Lab. 18:17–24.
_____. 1950b. The species of Matelea (including Gonolobus) in
North Central Texas. Field & Lab. 18:73–78.
_____. 1950c. The Texas species of Cacalia (Compositae). Field
& Lab. 18:79–82.
_____. 1950d. The north Texas species of Plantago
(Plantaginaceae). Field & Lab. 18:113–119.
_____. 1951a. The Texas species of Psoralea (Leguminosae).
Field & Lab. 19:14–25.
_____. 1951b.The north Texas species of Heterotheca,including
Chrysopsis (Compositae). Field & Lab. 19:66–71.
_____. 1951c. Notes on Texas Compositae.VII.Field & Lab.19:74–82.
_____. 1951d. The north Texas species of Hymenocallis
(Amaryllidaceae). Field & Lab. 19:102–104.
_____. 1951e. The Texas species of Evax (Compositae). Field &
Lab. 19:125–126.
_____. 1951f. Agave lata,a new species from north Texas and
Oklahoma. Field & Lab. 19:171–173.
_____. 1951g. The north Texas species of Mirabilis (Nyctaginaceae).