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Descriptions

W.D. Clayton, M. Vorontsova, K.T. Harman & H. Williamson

© Copyright The Board of Trustees, Royal Botanic Gardens, Kew.

Enteropogon dolichostachyus

HABIT Perennial; caespitose. Culms geniculately ascending; 60–100 cm long. Leaf-sheaths outer margin hairy. Ligule a fringe of hairs. Leaf-blades flat, or involute; 12–30 cm long; 8 mm wide; glaucous. Leaf-blade margins scabrous.

INFLORESCENCE Inflorescence composed of racemes.

Racemes 4–10; digitate; drooping; unilateral; 10–20 cm long. Rhachis angular. Spikelet packing broadside to rhachis; regular; 2 -rowed.

Spikelets appressed; solitary. Fertile spikelets sessile.

FERTILE SPIKELETS Spikelets comprising 1 fertile florets; with diminished florets at the apex. Spikelets elliptic; dorsally compressed; 4.5–5 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus evident; pilose; obtuse.

GLUMES Glumes persistent; dissimilar; shorter than spikelet; thinner than fertile lemma; gaping. Lower glume lanceolate; 1.7 mm long; 0.4 length of upper glume; membranous; without keels; 1 -veined. Lower glume primary vein scaberulous. Lower glume lateral veins absent. Lower glume apex acuminate. Upper glume lanceolate; 4.5 mm long; 0.8 length of adjacent fertile lemma; membranous; without keels; 1 -veined. Upper glume primary vein scaberulous. Upper glume lateral veins absent. Upper glume mucronate.

FLORETS Fertile lemma elliptic; dorsally compressed; 4.5–5 mm long; coriaceous; keeled; 3 -veined. Lemma midvein scaberulous. Lemma lateral veins excurrent. Lemma surface scaberulous; rough on veins. Lemma apex awned; 1 -awned. Principal lemma awn 8 mm long overall. Palea 2 -veined. Palea keels scaberulous. Apical sterile florets 1 in number; lanceolate; 1 mm long. Apical sterile lemmas awned; 1 -awned.

FLOWER Anthers 3; 1.4 mm long.

FRUIT Caryopsis with free soft pericarp; ellipsoid; flattened; concavo-convex.

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

NOTES Cynodonteae. Gilliland.

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