Pkytologia (October 1992) 73(4):274-276. EUSTACHYS RETUSA (POACEAE), THE FIRST REPORT IN FLORIDA AND A KEY TO EUSTACHYS IN FLORIDA Stanley D. Jones & J.K. WipfF S.M. Tracy Herbarium (TAES), Department of Rangeland Ecology and Management, Texas A&M University, College Station, Texas 77843-2126 U.S.A. ABSTRACT Eustachys reiusa (Lag.) Kunth, ChlorideaerPoaceae, previously un-reported in Florida h«« been foimd in the southern coastal plain of the panhzuidle in Okaloosa County. KEY WORDS: Eustachys, Eustachys retusa, tribe Chlorideae, Poaceae, Florida Eustachys Desv. m Nouv. is composed of ten species, principally of the New World tropiczd savannas (Clayton & Renvoize 1986). Six species of Eustachys are now found in Florida: Eustachys distichophylla (Lag.) Nees, E. flortdana Chapm., E. glauca Chapm., E. neglecta (Nash) Nash, E. petraea (Swartz) Desv., and E. retusa (Lag.) Kunth. Long & Lakela (1971), Wunderlin (1982), Clewell (1985), nor Anderson (1984, 1986, 1988) have listed E. re^twa as occur-ring in Florida. It has been recorded in Georgia, New York, South Carolina, and Texas (McKenzie et al. 1987). Eustachys retusa can be confused with small or depauperate specimens of E. distichophylla. Eustachys distichophylla is usually a much larger and more robust plant with more numerous panicle branches, much longer, flexuous spikes, and upper, acute, sterile florets. The following key will separate the taxa of Eustachys found in Florida (modified from McKenzie et al. 1987). KEY TO EUSTACHYS IN FLORIDA 1. Lateral veins of the fertile lemma glabrous E. glauca 1' Lateral veins of the fertile lemma pubescent 2 274
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