Hygroryza aristata

HABIT Perennial. Stolons present. Culms prostrate; 5–20 cm long; spongy; rooting from lower nodes. Leaf-sheaths inflated; longer than adjacent culm internode. Ligule an eciliate membrane. Leaf-blade base cordate. Leaf-blades floating; elliptic, or oblong, or ovate; 2.5–5 cm long; 12–15 mm wide.

INFLORESCENCE Inflorescence a panicle.

Panicle open; pyramidal; 3–5 cm long. Primary panicle branches whorled at lower nodes.

Spikelets solitary. Fertile spikelets pedicelled.

FERTILE SPIKELETS Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets lanceolate; laterally compressed; 6–7 mm long; falling entire. Floret callus elongated; 2–10 mm long.

GLUMES Glumes both absent or obscure.

FLORETS Fertile lemma linear; 6–7 mm long; chartaceous; keeled; 5 -veined. Lemma midvein ciliate. Lemma margins ciliate. Lemma apex acuminate; awned; 1 -awned. Principal lemma awn 5–10 mm long overall. Palea lanceolate; 1 length of lemma; chartaceous; 3 -veined; 1-keeled. Palea keels ciliate.

FLOWER Lodicules 2. Anthers 6.

DISTRIBUTION Asia-temperate: China and eastern Asia. Asia-tropical: India and Indo-China.

NOTES Oryzeae. Fl Cey.

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