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NOTES NEW DESMANTHA TO ARISTIDA MISSOURI.— (POACEAE), & Aristida desmantha Trin. Rupr. an annual grass occurring on sandy dry, is Texas, Louisiana, and Nebraska (Hitchcock soil in Illinois, 1951; Mohlenbrock Gould During 1973; 1975; Allen 1992). recent surveys for Mohlenbrock Cyperus grayoides in southeastern Missouri, a population of was Aristida desmantha discovered in Scott County. MISSOURI. Voucher specimens: U.S.A. Scott Co.: ca. mi E of the intersection of Rt. 1 H and Co. Rd. 504; last field on north side of Co. Rd. 504 before intersection with Co. Rd. 505; T28N, R14E, SWl/4 of SEL/4 of SEI/4 of Sec. 28, 15 Oct 1992, McKenzie 1163 MO, NMC, UMO); (LSU, same location, 7 Sep 1993, McKenzte 1286 with Sherry Holmes and John Logan (MO). Habitat at the discovery site a dry, remnant sand prairie with recent is The wind history of disturbance. deep, sandy eolian deposited) soil is (i.e., & in origin (Saucier 1978; Bridges Orzell 1989), and has been classified as & belonging to the Scotco Association (Festervand 1981; Carter Bryson 1991). Such habitats in southeastern Missouri are remnants of what were formerly more extensive sand by Nelson These prairies as classified (1985). sand were apparently derived from sand dune formations prairies associated with deposition of Wisconsinan Stage glacial outwash by the Missis- and Ridge sippi-Missouri rivers east west of Crowley's in southeastern Mis- souri and northeastern Arkansas (Saucier 1978). Most remaining tracts of human remnant sand prairies the region have been greatly altered by in & Bryson At acrivities (Carter 1991). the discovery Aristida desmantha site, was associated with Andropogon ternarius Michx., Digitaria cognata (Schultes) Pilger, Dtodia teres Walt. var. teres, Froelichia gracilis (Hook.) Moq., Cyperus grayoides, Opuntia humifusa Raf. var. hmnifusa, and Trip las purpurea (Walt.) is Chapman. During the 7 Sep 1993 tens of thousands of plants were visit, estimated to occur at the Searches in similar, adjacent habitat have site. produce any The County failed to additional populations. Scott site ca. is km SSW WhAt 320 of the nearest locality in west central Illinois. Aristida known desmantha currently only from the discovery further surveys is site, in appropriate sand prairie habitat in southeastern Missouri are likely to The yield additional records. species should be considered as a candidate for state-endangered status following guidelines established by the Mis- Department souri of Conservation (1992). thank the following for assistance: George Yatskievych, Missouri De- I New partment of Conservation- Flora of Missouri project; and Kelly AUred, Doug Tim Mexico Sate University. Ladd, The Nature Conservancy; and Doug Newman, Smith and Missouri Department of Conservation reviewed manuscript.— and mid- an earlier draft of the P^/^/M. McKenzie, U.S. Fish MO 608 Cherry Rm. 200, Columbia, 65201, U.S.A. Service, E. Si., life CM. Allen, 1992. Grasses of Louisiana. 2nd ed. Cajun Prairie Habitat Preservation Soci- LA. Eunice, ety, Bridges, E.L. and S.L. Orzell. 989. Additions and noteworthy vascular plant collections 1 from Texas and Louisiana, with historical ecological and geographical notes. Phytologia 66:12-69. A Carter, R. and C.T. Bryson. 1991. report oi Cyperus grayoides and Cyperus retroflexus (Cyperaceae) new to Missouri and notes on other selected Missouri Cyperus. Sida 14:475- Festervand, D.E. 1981. Soil survey of Cape Girardeau, Mississippi, and Scott counties, Missouri. U.S.D.A./Soil Conserv. Serv., in cooperation with the Missouri Agric. Exp. Sta. A&M Gould, The F.W. 1975. grasses of Texas. Texas Press, College Station. Hitchcock, A.S.. 1951. Manual of the grasses of the United States. 2nd ed., revised by Agnes Chase. U.S.D.A. Misc. Publ. 200. Committee, Areas Jefferson Cit Saucier, R.T. 1978. Sand dunes ai & Man alluvial valley. Geosci. 1