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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 parva
HABIT Perennial; caespitose. Butt sheaths persistent and investing base of culm; with compacted dead sheaths. Basal innovations extravaginal and intravaginal. Culms erect; 2.5–4 cm long. Leaf-sheaths smooth; glabrous on surface. Ligule an eciliate membrane; 0.5–0.75 mm long; glabrous on abaxial surface; acute. Leaf-blades erect; straight, or curved; filiform; involute; 1.4–1.8 cm long; 0.4–0.75 mm wide; stiff. Leaf-blade surface smooth; glabrous. Leaf-blade apex abruptly acute.
INFLORESCENCE Inflorescence a panicle; comprising 4–5 fertile spikelets.
Panicle contracted; linear; 1–1.5 cm long; 0.1–0.2 cm wide; bearing few spikelets. Primary panicle branches appressed; 1 -nate; 0.45–0.7 cm long; bearing 1 fertile spikelets on each lower branch. Panicle branches smooth.
Spikelets solitary. Fertile spikelets pedicelled.
FERTILE SPIKELETS Spikelets comprising 1 fertile florets; with a barren rhachilla extension. Spikelets ovate; laterally compressed; 2.5–3 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus glabrous.
GLUMES Glumes persistent; similar; shorter than spikelet. Lower glume ovate; 1.25–1.6 mm long; 0.75 length of upper glume; membranous; 1-keeled; 1 -veined. Lower glume lateral veins absent. Lower glume apex acute. Upper glume ovate; 1.75–2.1 mm long; 0.75 length of adjacent fertile lemma; membranous; 1-keeled; 3 -veined. Upper glume apex acute.
FLORETS Fertile lemma lanceolate; 2.4–2.65 mm long; membranous; keeled; 5 -veined. Lemma lateral veins obscure. Lemma apex acute. Palea 0.9–1 length of lemma. Palea keels smooth.
FLOWER Lodicules 2; membranous. Anthers 3; 0.75 mm long.
FRUIT Caryopsis with adherent pericarp. Hilum punctiform.
DISTRIBUTION Asia-tropical: Papuasia.
NOTES Poeae. Veldkamp 1997.
Please cite this publication as detailed in How to Cite Version: 3rd February 2016.