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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 minimiflora

HABIT Perennial; caespitose. Butt sheaths persistent and investing base of culm; with fibrous dead sheaths. Basal innovations extravaginal and intravaginal. Culms erect; 15–30 cm long. Leaf-sheaths smooth; glabrous on surface. Ligule an eciliate membrane; 1.5–4.5 mm long; truncate. Leaf-blades filiform; involute; 4–8 cm long; 0.6 mm wide. Leaf-blade surface smooth; glabrous. Leaf-blade apex abruptly acute.

INFLORESCENCE Inflorescence a panicle. Peduncle smooth, or scaberulous above.

Panicle open; lanceolate; 3–5.5 cm long; 0.5–1.4 cm wide. Primary panicle branches appressed, or ascending; 1–3 -nate; 1–2.6 cm long; bearing 2–8 fertile spikelets on each lower branch. Panicle branches scabrous.

Spikelets solitary. Fertile spikelets pedicelled.

FERTILE SPIKELETS Spikelets comprising 2 fertile florets; with a barren rhachilla extension. Spikelets ovate; laterally compressed; 2.25–2.75 mm long; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes 0.2–0.35 mm long; smooth. Floret callus glabrous.

GLUMES Glumes persistent; similar; shorter than spikelet. Lower glume lanceolate; 1.35–2.2 mm long; 0.75 length of upper glume; membranous; 1-keeled; 3 -veined. Lower glume primary vein scabrous. Lower glume lateral veins absent. Lower glume surface asperulous. Lower glume apex acute. Upper glume lanceolate; 1.75–2.5 mm long; 0.75 length of adjacent fertile lemma; membranous; 1-keeled; 3 -veined. Upper glume primary vein scabrous. Upper glume surface asperulous. Upper glume apex acute.

FLORETS Fertile lemma elliptic; elliptic in profile; 2–2.4 mm long; membranous; keeled; 5 -veined. Lemma surface scaberulous; glabrous. Lemma apex acute. Palea keels scaberulous; adorned above. Rhachilla extension 0.4–0.65 mm long.

FLOWER Lodicules 2; membranous. Anthers 3; 0.5–1.2 mm long; yellow, or purple.

FRUIT Caryopsis with adherent pericarp; ellipsoid; 1.4–1.5 mm long. Hilum punctiform.

DISTRIBUTION Asia-tropical: Papuasia.

NOTES Poeae. Alp Fl N Guin 1994.

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