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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 paramoensis

HABIT Perennial; caespitose; clumped loosely. Basal innovations intravaginal. Culms erect; slender; 15–40 cm long; 0.5 mm diam. Culm-internodes terete; distally glabrous. Leaves mostly basal. Leaf-sheaths longer than adjacent culm internode; glabrous on surface. Ligule an eciliate membrane; 3–4 mm long; scaberulous on abaxial surface; acute. Leaf-blades conduplicate; 3–6 cm long; 2 mm wide. Leaf-blade surface scaberulous; rough adaxially; glabrous. Leaf-blade apex abruptly acute; hooded.

INFLORESCENCE Inflorescence a panicle.

Panicle open; ovate; 6–8 cm long; with spikelets clumped along branches. Primary panicle branches 2–3 in number; drooping; distant; 1 -nate. Panicle branches scabrous.

Spikelets solitary. Fertile spikelets pedicelled. Pedicels clavate; 0.5–2 mm long; scaberulous.

FERTILE SPIKELETS Spikelets comprising 2–3 fertile florets; with diminished florets at the apex. Spikelets lanceolate; laterally compressed; 5–5.5 mm long; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes 1 mm long. Floret callus woolly.

GLUMES Glumes persistent; similar; shorter than spikelet, or reaching apex of florets. Lower glume lanceolate; 4.5–5.5 mm long; 1 length of upper glume; membranous; much thinner on margins; 1-keeled; 1 -veined. Lower glume lateral veins absent. Lower glume apex acute. Upper glume lanceolate; 4.5–5.5 mm long; 1–1.2 length of adjacent fertile lemma; membranous; with scarious margins; 1-keeled; 3 -veined. Upper glume lateral veins obscure. Upper glume apex acute.

FLORETS Fertile lemma lanceolate; elliptic in profile; 4.5 mm long; membranous; much thinner on margins; keeled; 3 -veined. Lemma midvein scabrous. Lemma surface asperulous; rough on veins; glabrous. Lemma apex acute. Palea 3–5 mm long; 0.75 length of lemma. Palea keels scabrous; adorned above. Apical sterile florets resembling fertile though underdeveloped.

FLOWER Lodicules 2; membranous. Anthers 3; 1.8 mm long.

FRUIT Caryopsis with adherent pericarp; lanceolate; 2 mm long. Embryo 0.2 length of caryopsis. Hilum punctiform.

DISTRIBUTION South America: western South America.

NOTES Poeae. Laegaard 2001.

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