Dichanthelium filiramum (Ashe) LeBlond. Phen: May-Oct. Hab: Dry to moist sandy pinelands. Dist: DE south to FL, west to TX and AR; West Indies.
Origin/Endemic status: Native
Other Comments: This species has the longitudinally wrinkled leaves 15-20+ times as long as wide plus the strongly nerved spikelets associated with the D. aciculare group. The villous nodes and longer ligules lead it towards the D. acuminatum group. The Ashe type for Panicum filiramum was treated as a synonym of P. aciculare by Hitchcock & Chase (1910), but it is the same as Nash’s P. chrysopsidifolium published three years later. Lower leaves of the Florida type of P. chrysopsidifolium are up to 10 mm wide, but no plants have been seen outside of Florida with leaves wider than 5 mm. The specific epithet filiramum was changed to filirameum by Hitchcock & Chase, but Ashe’s original spelling has been determined to be legitimate.
Synonymy: = LeBlond (2016), LeBlond (2017a) in Weakley et al (2017); = Dichanthelium chrysopsidifolium (Nash) J.R.Thomas & Wipff – Wipff (2020); = Panicum chrysopsidifolium Nash – G, HC, S; = Panicum filiramum Ashe; < Dichanthelium acuminatum (Sw.) Gould & C.A.Clark var. acuminatum – K1, K3, Gould & Clark (1978); < Dichathelium acuminatum – FNA25, Freckmann et al. (2008); < Panicum aciculare Desv. ex Poir. – F; < Panicum consanguineum Kunth – RAB; < Panicum lanuginosum Elliott var. lanuginosum – C