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.

Poa celebica

HABIT Perennial; caespitose. Basal innovations extravaginal and intravaginal. Culms erect; 4–9 cm long. Lateral branches lacking. Leaves mostly basal. Ligule an eciliate membrane; 0.85–1.6 mm long; 0.85–1.6 mm long on basal shoots; glabrous on abaxial surface; acute. Leaf-blades erect; filiform; involute; 2.5–3.2 cm long; 0.5 mm wide. Leaf-blade surface smooth. Leaf-blade apex acute.

INFLORESCENCE Inflorescence a panicle.

Panicle open; ovate; 1.6–2 cm long; 0.5–0.8 cm wide. Primary panicle branches ascending; 2 -nate; 0.8–1 cm long; bearing 2 fertile spikelets on each lower branch. Panicle branches scaberulous.

Spikelets solitary. Fertile spikelets pedicelled.

FERTILE SPIKELETS Spikelets comprising (1–)2 fertile florets; with a barren rhachilla extension. Spikelets oblong; laterally compressed; 2.1–2.85 mm long; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes 0.2–0.25 mm long; smooth. Floret callus glabrous.

GLUMES Glumes persistent; similar; shorter than spikelet. Lower glume lanceolate; 1.1–1.75 mm long; 0.75–0.85 length of upper glume; membranous; 1-keeled; 1 -veined. Lower glume primary vein scaberulous. Lower glume lateral veins absent. Lower glume surface smooth. Lower glume apex acute. Upper glume ovate; 1.5–2 mm long; 0.8 length of adjacent fertile lemma; membranous; 1-keeled; 3 -veined. Upper glume primary vein scaberulous. Upper glume surface smooth. Upper glume apex acute.

FLORETS Fertile lemma ovate; 1.85–2.4 mm long; membranous; keeled; 3(–5) -veined. Lemma midvein without distinctive roughness, or scaberulous. Lemma lateral veins obscure. Lemma surface smooth. Lemma apex acute. Palea keels smooth. Rhachilla extension 0.3–0.65 mm long.

FLOWER Lodicules 2; membranous. Anthers 3; retained within floret.

FRUIT Caryopsis with adherent pericarp. Hilum punctiform.

DISTRIBUTION Asia-tropical: Malesia.

NOTES Poeae. Veldkamp 1995.

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