Perotis rara

HABIT Annual. Culms erect, or geniculately ascending; 15–35 cm long. Culm-nodes glabrous. Leaves cauline. Leaf-sheaths glabrous on surface. Leaf-sheath oral hairs bearded. Ligule a fringe of hairs. Leaf-blades lanceolate; 2–5 cm long; 2–3 mm wide. Leaf-blade surface glabrous. Leaf-blade margins ciliate.

INFLORESCENCE Inflorescence composed of racemes.

Racemes 1; single; multilateral; 10–20 cm long. Spikelet packing crowded, or contiguous; irregular.

Spikelets ascending, or spreading, or deflexed; solitary. Fertile spikelets sessile.

FERTILE SPIKELETS Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets linear, or lanceolate; subterete; 7–9 mm long; falling entire. Spikelet callus linear; 0.5–0.7 mm long; pubescent; base pungent.

GLUMES Glumes similar; exceeding apex of florets; firmer than fertile lemma. Lower glume linear; 7–9 mm long; 1 length of upper glume; membranous; without keels; 1 -veined. Lower glume primary vein scaberulous. Lower glume lateral veins absent. Lower glume margins ciliolate. Lower glume apex acuminate; awned; 1 -awned. Lower glume awn 30–40 mm long. Upper glume linear; 7–9 mm long; 2–3.5 length of adjacent fertile lemma; membranous; without keels; 1 -veined. Upper glume primary vein distinct; scaberulous. Upper glume lateral veins absent. Upper glume margins ciliolate. Upper glume apex acuminate; awned; 1 -awned. Upper glume awn 30–40 mm long.

FLORETS Fertile lemma lanceolate; 2–4 mm long; hyaline; without keel; 1 -veined. Lemma apex obtuse. Palea hyaline; 0 -veined; without keels.

FLOWER Anthers 3; 0.3 mm long.

FRUIT Caryopsis with adherent pericarp.

DISTRIBUTION Asia-temperate: China and eastern Asia. Asia-tropical: Indo-China, Malesia, and Papuasia. Australasia: Australia.

NOTES Cynodonteae. Tothill.

Please cite this publication as detailed in How to Cite Version: 3rd February 2016.