Isachne myosotis

HABIT Annual; mat forming, or caespitose. Culms prostrate; 2–6 cm long. Lateral branches ample. Leaf-sheaths pilose; with simple hairs, or tubercle-based hairs; outer margin hairy. Ligule a fringe of hairs; 1 mm long. Leaf-blades lanceolate, or ovate; 5–15 cm long; 2–4 mm wide. Leaf-blade surface pubescent, or pilose; densely hairy; with tubercle-based hairs.

INFLORESCENCE Inflorescence a panicle.

Panicle contracted; elliptic; 7–16 cm long; bearing few spikelets. Panicle branches smooth.

Spikelets solitary. Fertile spikelets pedicelled.

FERTILE SPIKELETS Spikelets comprising 2 fertile florets; without rhachilla extension. Spikelets orbicular; dorsally compressed; 1–1.5 mm long; breaking up at maturity; disarticulating below each fertile floret.

GLUMES Glumes deciduous; similar; shorter than spikelet; thinner than fertile lemma. Lower glume ovate; 1–1.5 mm long; 1 length of upper glume; 1 length of spikelet; membranous; without keels. Lower glume surface glabrous, or hispidulous. Lower glume apex obtuse. Upper glume ovate; 1–1.5 mm long; 1 length of adjacent fertile lemma; membranous; without keels. Upper glume surface glabrous, or hispidulous. Upper glume apex obtuse.

FLORETS Fertile lemma elliptic, or orbicular; 1–1.3 mm long; coriaceous; without keel. Lemma surface puberulous. Lemma margins involute. Lemma apex obtuse. Palea coriaceous; 2 -veined.

FLOWER Anthers 3.

DISTRIBUTION Asia-temperate: China and eastern Asia. Asia-tropical: Indo-China, Malesia, and Papuasia. Australasia: Australia.

NOTES Isachneae. Reeder 1993.

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