Muhlenbergia subg. Ramulosae P.M. Peterson, subgen. nov.

Peterson, Paul M., Herrera Arrieta, Yolanda, Lobo Cabezas, Silvia & Romaschenko, Konstantin, 2023, Taxonomic revision of Muhlenbergia (Poaceae, Chloridoideae, Cynodonteae, Muhlenbergiinae) in Central America: phylogeny and classification, PhytoKeys 230, pp. 1-106 : 1

Muhlenbergia subg. Ramulosae P.M. Peterson, subgen. nov.

Description.

Delicate annuals. Culms (3-)5-25 cm tall, erect or spreading, not rooting at the lower nodes. Leaf sheaths 3-30 cm long, usually shorter than the internodes; ligules 0.2-0.5 mm long, hyaline, apex truncate; blades 0.5-3.0 cm long, 0.8-1.2 mm wide, involute or flat. Panicles (1-)2-9 cm long, 0.6-2.7 mm wide, exserted, ovoid or deltoid, branches loosely contracted, ascending or spreading. Spikelets 1-flowered; glumes 0.4-0.7 mm long, shorter than the lemma, 1-veined, glabrous, apex obtuse to subacute; lemmas 0.8-1.3 mm long, oval, plump, 3-veined, awnless, mottled with greenish-black and greenish-white areas, apex acute. Stamens 3; anthers 0.2-0.3 mm long. Caryopses 0.5-1 mm long, ellipsoid.