These are species (a) previously described as a species or variety but generally unrecognized in published accounts of the Texas flora, usually because the name was considered a synonym of some other species name, (b) previously regarded as extremely rare or even extinct in Texas and recently rediscovered, or (c) previously noted in at least one account to occur in Texas but never documented, first documented here.
Cyperaceae
* Cyperus cephalanthus Torrey & Hook.
Brown, L.E. and I.S. Elsik. 2002. Notes on the flora of Texas with additions and other significant records. II. Sida 20:437–444. Harris Co. “Carter and McInnis (1993) reported the type locality of this sedge from somewhere near Galveston Bay. The type collection was made in 1835 and the species has not been recollected in Texas since.” Rosen, D.J. and B.J. Christoffersen. 2004. Rediscovery of Cyperus cephalanthus (Cyperaceae) in Texas. Phytologia 86:110-112. Brazoria Co.
Euphorbiaceae
* Phyllanthus niruri L. subsp. lathyroides (Kunth) G.L. Webster
Noted by Correll & Johnston (1970) as perhaps extinct in its only then-known Texas locality (Gonzales Co.); documented here for DeWitt Co. and Fayette Co. Brown, L.E. and S.J. Marcus. 1998. Notes on the flora of Texas with additions and other significant records. Sida:18:315-324.
Fabaceae
* Rhynchosia tomentosa (L.) Hook. & Arn.
Brown, L.E. and I.S. Elsik. 2002. Notes on the flora of Texas with additions and other significant records. II. Sida 20:437–444. Jasper Co. Reported in previous literature but without documented voucher or locality information.
Orchidaceae
* Deiregyne confusa Garay
Rediscovered in 2004 in essentially in the same area as the original 1931 collection by Steyermark in the Chisos Mountains. Ambs, S. 2006. The elusive Deiregyne confusa. Native Orchid Conf. J. 3:1-5. Coleman, R.A., J. Sirotnak, and A. Leavitt. 2006. The hunt for Deiregyne confusa. Native Orchid Conf. J. 3:7-8, 13.
Poaceae
* Paspalum wrightii A.S. Hitchc. & Chase
Brown, L.E., E.L. Keith, D.J. Rosen, and J. Liggio. 2007. Notes of the flora of Texas with additions and other significant records. III. J. Bot. Res. Inst. Texas 1:1255-1264. Jackson Co., Matagorda Co., Wharton Co. The type locality is from Texas but this species was not generally recognized as distinct until the treatment by Allen and Hall (FNA, 2003): mapped in Calhoun Co., Jackson Co., Matagorda Co.
