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Descriptions

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

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

Coelachne madayensis

HABIT Annual. Culms erect; 3–8 cm long; rooting from lower nodes. Culm-internodes 0.3–0.5 cm long; distally glabrous. Culm-nodes glabrous. Leaf-sheaths loose; 0.3–0.6 cm long; mostly shorter than adjacent culm internode, or subequal to internodes; striately veined; hispid. Ligule absent. Leaf-blade base cordate. Leaf-blades ovate; 0.8–1.2 cm long; 5–6 mm wide. Leaf-blade venation with 7–15 secondary veins. Leaf-blade surface puberulous; hairy abaxially. Leaf-blade margins ciliate; hairy at base. Leaf-blade apex acute.

INFLORESCENCE Inflorescence a panicle; comprising 5–15 fertile spikelets.

Panicle open; ovate; 3–6 cm long. Primary panicle branches 0.4–0.8 cm long; bearing 1–3 fertile spikelets on each lower branch. Panicle branches glandular (at base).

Spikelets solitary. Fertile spikelets pedicelled.

FERTILE SPIKELETS Spikelets comprising 2 fertile florets; without rhachilla extension. Spikelets elliptic; laterally compressed; 1–1.5 mm long; 0.5–0.7 mm wide; breaking up at maturity; disarticulating below each fertile floret. Floret callus woolly.

GLUMES Glumes persistent; similar; shorter than spikelet; thinner than fertile lemma. Lower glume ovate; 0.75 mm long; 0.75 length of upper glume; 0.5 length of spikelet; membranous; much thinner on margins; purple; without keels. Upper glume ovate; 0.9 mm long; 0.6–0.9 length of spikelet; membranous; with hyaline margins; purple.

FLORETS Fertile florets female (upper); with the lowest dissimilar. Lowest fertile lemma bisexual; lanceolate; 1.5 mm long; 1.25 length of adjacent lemma; firmer than adjacent lemma; hairy. Fertile lemma lanceolate; 1.2 mm long; 0.5 mm wide; hyaline; purple; without keel; 0 -veined. Lemma surface pilose. Lemma apex acute. Palea 1 length of lemma.

FLOWER Anthers 3; 1.25 mm long. Stigmas 2.

FRUIT Caryopsis with adherent pericarp; ellipsoid; 1 mm long; purple.

DISTRIBUTION Asia-tropical: India.

NOTES Isachneae. Pramod et al 2014.

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