GrassBase - The Online World Grass Flora


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

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

Axonopus arcuatus

HABIT Perennial. Basal innovations flabellate. Culms slender; 45 cm long; 1 -noded. Culm-internodes distally glabrous. Leaf-sheaths 5–8 cm long. Ligule a ciliate membrane; 0.4 mm long. Leaf-blades curved, or curled; conduplicate; 6–8 cm long; 1 mm wide; stiff. Leaf-blade surface glabrous. Leaf-blade apex obtuse.

INFLORESCENCE Inflorescence composed of racemes; with 1 peduncles per sheath. Peduncle 24 cm long.

Racemes 4; digitate; unilateral; 7–9 cm long. Rhachis angular; 0.3 mm wide; scaberulous on margins; glabrous on margins. Spikelet packing adaxial. Raceme-bases brief; pilose.

Spikelets appressed; solitary. Fertile spikelets pedicelled. Pedicels reduced to a stump; 0.1–0.2 mm long; ciliate; hairy at base; with 0.5–1 mm long hairs.

FERTILE SPIKELETS Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets elliptic, or oblong; dorsally compressed; obtuse; 1.7–1.8 mm long; 0.6–0.7 mm wide; falling entire.

GLUMES Glumes one the lower absent or obscure; shorter than spikelet; thinner than fertile lemma. Upper glume 1.6–1.7 mm long; 0.9 length of spikelet; hyaline; 2 -veined. Upper glume primary vein absent. Upper glume surface glabrous.

FLORETS Basal sterile florets barren; without significant palea. Lemma of lower sterile floret similar to upper glume; 1.6–1.7 mm long; 0.9 length of fertile lemma; hyaline; 2 -veined; without midvein; glabrous. Fertile lemma 1.7–1.8 mm long; indurate; light brown; shiny; without keel. Lemma margins involute. Palea involute; indurate.

FRUIT Caryopsis with adherent pericarp.

DISTRIBUTION South America: Brazil.

NOTES Paniceae. Black 2004.

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