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Descriptions

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

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

Poa muricata

HABIT Perennial; caespitose. Basal innovations extravaginal and intravaginal. Culms erect; 7–23 cm long. Lateral branches lacking. Leaves mostly basal. Ligule an eciliate membrane; 2.3–3.5 mm long; 0.5–2 mm long on basal shoots; glabrous on abaxial surface, or scaberulous on abaxial surface; acute. Leaf-blades erect; straight, or curved; aciculate; 2.7–8 cm long; 0.6–1.3 mm wide. Leaf-blade surface scaberulous. Leaf-blade apex acute.

INFLORESCENCE Inflorescence a panicle.

Panicle contracted; linear; 2.5–4.5 cm long; 0.4–1.1 cm wide. Primary panicle branches appressed; 1–3 -nate; 0.9–2 cm long; bearing 5–16 fertile spikelets on each lower branch. Panicle branches scabrous.

Spikelets solitary. Fertile spikelets pedicelled.

FERTILE SPIKELETS Spikelets comprising (1–)2 fertile florets; with a barren rhachilla extension. Spikelets oblong; laterally compressed; 2.85–3.25 mm long; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes 0.3–0.5 mm long; smooth. Floret callus glabrous.

GLUMES Glumes persistent; similar; exceeding apex of florets. Lower glume lanceolate; 2.25–2.75 mm long; 1 length of upper glume; membranous; 1-keeled; 1–3 -veined. Lower glume lateral veins absent, or obscure. Lower glume surface scabrous. Lower glume apex acute. Upper glume ovate; 2.25–3 mm long; 1.1 length of adjacent fertile lemma; membranous; 1-keeled; 3 -veined. Upper glume lateral veins obscure. Upper glume surface scabrous. Upper glume apex acute.

FLORETS Fertile lemma ovate; elliptic in profile; 2.4–2.8 mm long; membranous; keeled; 3 -veined. Lemma midvein scabrous. Lemma lateral veins obscure. Lemma surface smooth, or asperulous; glabrous. Lemma apex acute. Palea keels scabrous; adorned above. Rhachilla extension 0.5–0.8 mm long.

FLOWER Lodicules 2; membranous. Anthers 3; 0.6–1 mm long.

FRUIT Caryopsis with adherent pericarp. Hilum punctiform.

DISTRIBUTION Asia-tropical: Papuasia.

NOTES Poeae. Veldkamp 1995.

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