Dichanthelium arenicoloides (Ashe) LeBlond. Phen: May-Nov. Hab: Open sandy soil of pinelands and dunes, primarily near the coast; probably occasional to frequent, but long overlooked. Dist: NC south to FL and west to TX and AR; West Indies; Central America, and n. South America.
Origin/Endemic status: Native
Other Comments: Vernal form intermediate between D. aciculare and D. angustifolium. Vernal cauline leaves are longer than those of D. aciculare but of similar width. Panicle branches often ascending. Autumnal form strongly resembling D. aciculare but with larger, attenuate spikelets, longer first glumes, and both glumes attached 0.3-0.5 mm below expansion of fertile lemma.
Synonymy: = LeBlond (2017a) in Weakley et al (2017); = n/a – RAB; = Panicum arenicoloides Ashe – HC, S; < Dichanthelium aciculare (Desv. ex Poir.) Gould & C.A.Clark – K1, K3, K4, Mex, Gould & Clark (1978); < Dichanthelium aciculare (Desv. ex Poir.) Gould & C.A.Clark ssp. angustifolium (Elliott) Freckmann & Lelong – FNA25; < Panicum aciculare Desv. ex Poir. – C; < Panicum angustifolium Elliott – Tx