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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.
Isachne minutula
HABIT Perennial; caespitose; clumped loosely. Culms erect, or geniculately ascending, or decumbent; 5–45 cm long; 4 -noded; rooting from lower nodes. Culm-internodes 0.6–4.5 cm long. Culm-nodes pubescent. Leaf-sheaths 0.4–1.75 cm long; glabrous on surface, or pubescent; with tubercle-based hairs; outer margin hairy. Ligule a fringe of hairs; 0.7–1.5 mm long. Leaf-blades linear, or lanceolate, or ovate; 0.9–5.5 cm long; 2–5 mm wide. Leaf-blade venation with 5 secondary veins. Leaf-blade surface scaberulous; glabrous, or puberulous. Leaf-blade margins scaberulous.
INFLORESCENCE Inflorescence a panicle.
Panicle contracted; lanceolate, or elliptic; 2.5–5 cm long; 1–3 cm wide. Primary panicle branches 3–12 in number; 1–1.8 cm long; bearing 6–17 fertile spikelets on each lower branch. Panicle branches eglandular, or glandular; smooth, or scaberulous.
Spikelets in pairs. Fertile spikelets pedicelled. Pedicels filiform; glandular; smooth, or scaberulous.
FERTILE SPIKELETS Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets obovate; dorsally compressed; 1.3–2 mm long; 0.8–2 mm wide; breaking up at maturity; disarticulating below each fertile floret.
GLUMES Glumes deciduous; similar; reaching apex of florets; thinner than fertile lemma. Lower glume elliptic; 1.4–1.9 mm long; 1 length of upper glume; 1 length of spikelet; herbaceous; without keels; 7 -veined. Lower glume surface asperulous; rough above. Lower glume apex obtuse. Upper glume elliptic, or obovate; 1.4–1.9 mm long; 1 length of spikelet; herbaceous; without keels; 7(–9) -veined. Upper glume surface asperulous; rough above. Upper glume apex obtuse.
FLORETS Basal sterile florets male; with palea. Lemma of lower sterile floret oblong; 1.25–2 mm long; sulcate; obtuse. Palea of lower sterile floret 1.2–1.85 mm long. Fertile florets female. Fertile lemma elliptic; 0.9–1.4 mm long; 0.65–1.05 mm wide; coriaceous; without keel. Lemma surface pubescent. Lemma margins involute. Lemma apex obtuse. Palea 0.75–1.3 mm long; coriaceous. Palea surface puberulous.
FLOWER Anthers 3.
DISTRIBUTION Asia-tropical: India, Indo-China, Malesia, and Papuasia. Australasia: Australia. Pacific: northwestern.
NOTES Isachneae. Veldkamp 2007.
Please cite this publication as detailed in How to Cite Version: 3rd February 2016.
