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GrassBase - The Online World Grass Flora
Descriptions
W.D. Clayton, M. Vorontsova, K.T. Harman & H. Williamson
© Copyright The Board of Trustees, Royal Botanic Gardens, Kew.
Muhlenbergia rakhchamensis
HABIT Annual; caespitose. Culms erect; 25–35 cm long; rooting from lower nodes. Culm-internodes scaberulous. Culm-nodes brown, or purple; glabrous. Leaves mostly basal. Leaf-sheaths 0.5–4.1 cm long; without keel; glabrous on surface. Ligule an eciliate membrane; 0.2–0.5 mm long; lacerate; truncate. Leaf-blades linear, or lanceolate; 0.5–1.7 cm long; 2–4 mm wide. Leaf-blade midrib evident. Leaf-blade surface scaberulous; rough on both sides. Leaf-blade margins scabrous. Leaf-blade apex acute.
INFLORESCENCE Inflorescence a panicle. Peduncle 5.5–13 cm long.
Panicle spiciform; linear, or oblong; continuous, or interrupted; 1.5–4 cm long; 0.3–0.5 cm wide. Primary panicle branches ascending. Panicle axis scaberulous. Panicle branches scabrous.
Spikelets solitary. Fertile spikelets pedicelled. Pedicels 0.3–1.8 mm long; scabrous.
FERTILE SPIKELETS Spikelets comprising 1 fertile florets (with an apical sterile floret), or 2 fertile florets; without rhachilla extension, or with diminished florets at the apex. Spikelets elliptic; laterally compressed; 1.5 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus pilose.
GLUMES Glumes persistent; similar; shorter than spikelet. Lower glume lanceolate; 1.9–2.3 mm long; 1 length of upper glume; chartaceous; light green; 1-keeled; 1 -veined. Lower glume primary vein scabrous. Lower glume lateral veins absent. Lower glume apex acute; muticous, or mucronate. Upper glume lanceolate, or elliptic; 2–2.3 mm long; 0.9–1 length of adjacent fertile lemma; membranous; light green; 1-keeled; 1 -veined. Upper glume primary vein scabrous. Upper glume lateral veins absent. Upper glume apex acute.
FLORETS Fertile lemma lanceolate; 2–2.5 mm long; 0.3–0.8 mm wide; membranous; dark green; without keel; 3–5 -veined. Lemma surface scabrous. Lemma apex acute; awned; 1 -awned. Principal lemma awn 2–7 mm long overall. Palea lanceolate, or elliptic; 2–2.5 mm long; 1 length of lemma; 2 -veined. Palea surface pilose; hairy on back; hairy in the middle. Apical sterile florets resembling fertile though underdeveloped.
FLOWER Lodicules 2; cuneate; 0.3 mm long; truncate. Anthers 3; 0.7–0.9 mm long; yellow, or purple. Stigmas plumose.
DISTRIBUTION Asia-tropical: India.
NOTES Eragrostideae. S. Arumugam 2014.
Please cite this publication as detailed in How to Cite Version: 3rd February 2016.
