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.

Axonopus compressus

HABIT Perennial; mat forming. Stolons present. Basal innovations flabellate. Culms decumbent; 15–60 cm long. Culm-nodes pubescent. Leaf-sheaths keeled. Ligule a ciliolate membrane. Leaf-blades linear, or lanceolate; flat, or conduplicate; 3–20 cm long; 3–12 mm wide. Leaf-blade apex obtuse, or abruptly acute.

INFLORESCENCE Inflorescence composed of racemes.

Racemes 2–5; paired, or digitate; unilateral; 3–10 cm long. Rhachis angular; glabrous on surface; glabrous on margins. Spikelet packing adaxial; regular; 2 -rowed.

Spikelets appressed; solitary. Fertile spikelets sessile.

FERTILE SPIKELETS Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets lanceolate; dorsally compressed; obtuse; 2–2.5 mm long; falling entire.

GLUMES Glumes one the lower absent or obscure; reaching apex of florets; thinner than fertile lemma. Upper glume elliptic; 1.2–1.3 length of adjacent fertile lemma; 1 length of spikelet; membranous; without keels; 4–5 -veined. Upper glume surface glabrous, or pubescent; hairy between veins. Upper glume apex acute.

FLORETS Basal sterile florets barren; without significant palea. Lemma of lower sterile floret similar to upper glume; elliptic; 1.2–1.3 length of fertile lemma; 1 length of spikelet; 4–5 -veined; pubescent; hairy between veins; acute. Fertile lemma obovate; 1.5–2 mm long; indurate; pallid; without keel; 4 -veined. Lemma margins involute. Lemma apex obtuse; pubescent. Palea involute; indurate.

DISTRIBUTION Africa: west tropical, west-central tropical, east tropical, southern tropical, and western Indian ocean. Asia-temperate: China and eastern Asia. Asia-tropical: India, Indo-China, Malesia, and Papuasia. Australasia: Australia. Pacific: southwestern, south-central, northwestern, and north-central. North America: southeast USA and Mexico. South America: Mesoamericana, Caribbean, northern South America, western South America, Brazil, and southern South America.

NOTES Paniceae. FTEA.

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