Sporobolus junceus (P. Beauv.) Kunth

Sporobolus poiretii (R. & S.) Hitchc. Bartonia 14: 32. 1932
Agrostis compressa Pair, in Lam. Encyc. Suppl. 1: 258 (no. 78). 1810. Not .1. compressa Willd
1790, nor Poir. op. cit. 1: 259. 1810. Axonopus Poiretii R. 8c S. Syst. Veg. 2: 318. 1817. (Based on Agrostis compressa Poir. "n. 78.,"
and the basis of Sporobolus Poiretii.) Agrostis tenuissima Spreng. Svst. 1: 258. 1825. (Described from Wist Indies and Smith America ; Vilfa exilis Trin. Mem. Acad. St.-Petersb. VI. 6 2 : 89. 1840. (Type from Jalapa, Merit Vilfa Berleroana Trin. Mem. Acad. St.-Petersb. VI. 6 2 : 100. 1840. (Type from Santo Domingo.) Sporobolus angustus Buckl. Proc. Acad. Phila. 1862: 88. 1863. (Type from Tea Vilfa tenacissima var. exilis Fourn. Mex. PI. Cram. 99. 1886. (Based on Vilfa exilis Trin.) Vilfa tenacissima var. intermedia Fourn. Mex. PI. Gram. 99. 1886. (Type from Mexic Vilfa tenacissima var. robusta Fourn. Mex. PI. Gram. 100. 1886. (Tvpe from Mexi< Sporobolus Berteroanus Hitchc. & Chase, Contr. U. S. Nat. Herb. 18: 370. 1917. I Based on Vilfa
Berleroana Trin.)
Perennial; culms erect, solitary or in small tufts, glabrous, 30-100 cm. tall; sheaths glabrous, more or less pubescent on the margin and around the throat, somewhat keeled; ligule firm, less than 0.5 mm. long, ciliolate; blades flat at base, usually more or less involute above, tapering to a long fine point, glabrous or nearly so except the scabrous point; elongate, 2-5 mm. wide at base; panicle usually spikelike, but more or less interrupted, 10-40 cm. long, the branches appressed or ascending, closely flowered, the middle ones mostly less than 1 cm. long; spikelets about 2 mm. long; glumes obtuse, somewhat unequal, about half as long as the spikelet or less; lemma acutish.
Type locality: Carolina (Bosc).
Distribution: Open ground and waste places, Virginia to Tennessee and Arkansas; on ballast in Oregon and New Jersey; also tropical Asia; apparently introduced in America.

Sporobolus junceus Kunth, Rev. Gram. 1: 68. 1829
.4 grostis juncea Michx. Fl. Bor. Am. 1: 52. 1803. (Type from Carolina.) Not A.juncea Lam. 1783.
Heleochloa juncea Beauv. Agrost. 24, 147. 1812. (Based on A grostis juncea Michx.)
Colpodium junceum Trin. in Spreng. Neu. Entd. 2: 37. 1821. (Based on Agrostis juncea Michx.)
Crypsis juncea Steud. Nom. Bot. 1: 242. 1821. (Based on Agrostis juncea Michx.)
Vilfa juncea Trin. Gram. Unifl. 157. 1824. (Based on Agrostis juncea Michx.)
Vilfa Schiedeana Trin. Mem. Acad. St.-Petersb. VI. 6 2 : 73. 1840. (Type from Arkansas.)
Vilfa gracilis Trin. Mem. Acad. St.-Petersb. VI. 6 2 : 74. 1840. (Basis of Sporobolus gracilis.)
Vifa fulvescens Trin. Mem. Acad. St.-Petersb. VI. 6 2 : 76. 1840. (Type from North America.)
Vilfa subsetacea Trin. Mem. Acad. St.-Petersb. VI. 6-: 133 (in note). 1840. (Based on V. gracilis
Trin. [op. cit. page 74, not op. cit. page 104].) Vilfa Vinzenti Steud. Syn. Gram. 155. 1854. (Type from Rusk County, Texas.) Aira triglumis Steud. Syn. Gram. 223. 1854. (Type from Rusk County, Texas.) Sporobolus ejuncidus Nash, in Britton, Man. 106. 1901. (Based on Sporobolus junceus Kunth.) Sporobolus gracilis (Trin.) Merrill, Rhodora 4: 48. 1902.
Perennial; culms densely cespitose, erect, slender, glabrous, about 3-noded, 30-60 cm. tall; sheaths glabrous; ligule very short; blades closely folded or involute, glabrous beneath, puberulent on the upper surface near the base, scabrous-pubescent above the base, less than 1 mm. thick as folded; panicles mostly bronze-brown, oblong or narrowly pyramidal, open, 7-15 cm. long, the axis glabrous, the branches in verticils 1-2 cm. (rarely more) apart, flexuous, ascending or usually widely spreading, 2-3 cm. long, naked at base, the short-pediceled spikelets appressed, not overlapping or only slightly so; spikelets about 3 mm. long, glabrous; first glume about half as long as the spikelet, the second as long as the acute lemma or a little longer.
Type locality': Carolina.
Distribution: Pine barrens of the Coastal Plain, southeastern Virginia to Florida and Texas.