Louisiella

Landge, Shahid Nawaz & Shinde, Rajendra D., 2021, A new combination in the genus Louisiella (Poaceae: Paniceae), Phytotaxa 512 (2), pp. 107-111 : 110

Key to the species of Louisiella in the world

1. Spikelets 7.0– 8.2 mm long; lower palea absent; upper floret with sparse macrohairs at the apex; hilum linear, 2/3–1/1 the length of the caryopsis; panicles 4.0– 11 cm long ............................................................................................................................... L. fluitans

1. Spikelets (2.8–) 3.2–5.6 mm long; lower palea present; upper floret glabrous or slightly hairy; hilum linear, nearly 1/2 the length of the caryopsis or little shorter; panicles 25–50 cm long..................................................................................................................2

2. Lower lemma 2.8–3.8 mm long, 9 (–11) nerved; upper lemma 2.25–2.7 (–3.0) mm long, glabrous at the apex; caryopsis oblong, 1.5–2 mm long; embryo equal to hilum ............................................................................................................................ L. paludosa

2. Lower lemma 4.0–5.0 mm long, 7–9 nerved; upper lemma 2.4–4.6 mm long, glabrous or slightly hairy at the apex; caryopsis fusiform, 2.2–2.3 mm long; embryo shorter than hilum ............................................................................................. L. elephantipes