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NEW OKLAHOMA TALINUM RUGOSPERMUM (PORTULACACEAE) TO MacRoberts Christophers. Reid Barbara R. L MacRoberts Faulkner Michael Patricia H. Louisiana Natural IHeritage Program Bog Research, 740 Columbia Department and 71104 USA. and Louisiana of Wildlife Fisheries Shreveport, Louisiana Museum Box 98000 Lierbarium, of Sciences P.O. Life Baton Rouge, Louisiana 70898-9000 U.S.A. Louisiana State University-Shreveport Shreveport, Louisiana 711 15 U.S.A. ABSTRACT Talinum rugospermum Holz. (Portulacaceae) reported new Oklahoma. was discovered The Nature Conservancy's Boehler Seeps is to It at and SandhiUs Preserve in Atoka County. RESUMEN Oklahoma Se cita cono nuevo para Talinum rugospermum Holz. (Portulacaceae). Se ha descubierto en la reserva Nature Conservancy's Boehler Seeps and Sandhills en condado de Atoka. el Oklahoma Talinum rugospermum Holz. has not been reported from although occurs in Texas, Arkansas, it & & Kansas, and Louisiana (Cochrane 1993; Tayor Taylor 1994; Singhurst 1996; MacRoberts MacRoberts & NRCS Meacham USDA, Oklahoma 1997: Kartesz 1999: Kiser 2003: 2006: NatureServe 2006: Natural Heritage Inventory 2003; Hoagland 2004, Bruce Hoagland pers. comm., Jason Singhurst, pers. comm.). et al. On May we 18 and 2006, found over one hundred rugospermum plants in flower in xeric sandylands 19, T. at known The Nature Conservancy's Boehler Seeps and Sandhills Preserve, Atoka County, Oklahoma. Also as a bluejack oak sandhill community or Quercus incana-Quercus woodland association, xeric sandylands steZ/ata occur in eastern Texas, southern Oklahoma, southwestern Arkansas, and western Louisiana, and are rare in but Texas (Jones 1993; Hoagland 2000; MacRoberts 2002a; Diggs 2006). Xeric sandylands all et al. et al. are characterized by deep sands, an open understory, sparse vegetation, and distinct assemblage of plants, a many of which are endemic the West Gulf Coastal Plain (MacRoberts 2002a, 2002b). In Oklahoma, to et al. & Boehler Seeps and Sandhill Preserve is the best remaining site for this community (Jones Carpenter 1995; Gatti Clark 1997). The global conservation status rank for rugospermum assigned by NatureServe (2006) T. G3G4, meaning that either vulnerable across range (G3) or apparently secure (G4). Associate spe- is is its it cies at the site included Cnidoscolus texanus, Collinsia violacea, Commelina erecta, Eriogonum longijolium, Evax prolijera, Loejlingia squarrosa, Opuntia humijusa, Paronychia drummondii, Phacelia strictijlora, Quercus incana, and Selaginella arenicola ssp. Stylisma pickeringii. riddellii, W Voucher specimen: U.S.A. Oklahoma. Atoka Co.: Boehler Seeps and Sandhills Preserve, just of Boehler, SEl/4 SEl/4 S25 and NEl/4 NEl/4 S36, T4S R13E. 18 May 2006, Reid, Faulkner, MacRoberts, MacRoberts 5754 (LSU, OKL) ACKNOWLEDGMENTS We Amy thank Buthod and Lawrence K. Magrath reviewing the manuscript and providing helpful feed- for Oklahoma back. Bruce Hoagland, Biological Survey, and Jason Singhurst, Texas Parks and Wildlife Depart- We ment, provided information on the distribution of rugospermum. appreciate The Nature Conservancy T. Oklahoma of allowing access the property. for to REFERENCES and rugospermum Cochrane, TS. 1993. Status distribution of Talinunn Holzinger (Portulacaceae). Nat. Areas J. 13:33-41. - J. Bot. Res. Inst. Texas 1 (1): 777 778. 2007 778 Journal of the Botanical Research Institute of Texas 1(1) and DiGGS, G.M., B.L Lipscomb, M.D. Reed, RJ. O'Kennon. 2006. Illustrated flora of east Texas. Sida, Bot. Misc. 26:1-1 594. LC and Gatti Clark, 1997. 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