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Descriptions

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

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

Axonopus micay

HABIT Perennial; caespitose. Stolons present. Butt sheaths purple (violet tinged). Culms erect, or decumbent; 30–150 cm long; 3–8 mm diam.; without nodal roots, or rooting from lower nodes. Culm-internodes purple (violet tinged); distally glabrous. Culm-nodes glabrous. Lateral branches sparse. Leaves cauline. Leaf-sheaths glabrous on surface, or pubescent; outer margin glabrous, or hairy. Ligule a ciliolate membrane; 0.5 mm long. Collar glabrous, or pubescent. Leaf-blades linear, or lanceolate; flat; 15–38 cm long; 12–22 mm wide. Leaf-blade surface glabrous to pubescent; sparsely hairy; hairy adaxially. Leaf-blade margins ciliate; hairy at base. Leaf-blade apex obtuse, or acute.

INFLORESCENCE Inflorescence composed of racemes; terminal and axillary; with 1–2 peduncles per sheath.

Racemes 3–24; digitate, or borne along a central axis; ascending; unilateral; 6–16 cm long; simple, or with branchlets at base of longer racemes. Central inflorescence axis 4–7 cm long. Rhachis angular; 0.4–0.7 mm wide; with scattered hairs, or glabrous on surface; scabrous on margins; glabrous on margins. Spikelet packing adaxial.

Spikelets appressed; solitary. Fertile spikelets sessile.

FERTILE SPIKELETS Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets elliptic; dorsally compressed; 2.2–3 mm long; falling entire.

GLUMES Glumes one the lower absent or obscure; reaching apex of florets; thinner than fertile lemma. Upper glume ovate; 1 length of spikelet; membranous; without keels; 4 -veined. Upper glume primary vein absent. Upper glume margins pubescent.

FLORETS Basal sterile florets barren; without significant palea. Lemma of lower sterile floret similar to upper glume; ovate; 1 length of spikelet; 4 -veined; without midvein; pubescent on margins. Fertile lemma oblong; 2.2–2.8 mm long; indurate; yellow; without keel. Lemma margins involute. Lemma apex obtuse; pubescent. Palea involute; indurate.

FLOWER Anthers 3; 1–1.5 mm long.

FRUIT Caryopsis with adherent pericarp.

DISTRIBUTION South America: Mesoamericana and western South America.

NOTES Paniceae. SAR 2000.

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