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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 kelloggii
HABIT Perennial. Rhizomes elongated. Culms 30–60 cm long. Lateral branches lacking. Leaves mostly basal. Leaf-sheaths scaberulous; glabrous on surface. Ligule an eciliate membrane; obtuse. Leaf-blades flat, or conduplicate; 15–30 cm long; 2–4 mm wide.
INFLORESCENCE Inflorescence a panicle.
Panicle open; pyramidal; 7–15 cm long. Primary panicle branches spreading, or reflexed; 1–2 -nate. Panicle branches scabrous.
Spikelets solitary. Fertile spikelets pedicelled.
FERTILE SPIKELETS Spikelets comprising 3–4 fertile florets; with diminished florets at the apex. Spikelets ovate; laterally compressed; 4–6 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus woolly.
GLUMES Glumes persistent; similar; shorter than spikelet. Lower glume lanceolate; 3 mm long; 0.75 length of upper glume; membranous; 1-keeled; 3 -veined. Lower glume apex acute. Upper glume ovate; 4 mm long; 0.8–1 length of adjacent fertile lemma; membranous; 1-keeled; 3 -veined. Upper glume apex acute.
FLORETS Fertile lemma ovate; elliptic in profile; 4–5 mm long; membranous; keeled; 5 -veined. Lemma lateral veins obscure. Lemma surface glabrous. Lemma apex acute, or cuspidate. Palea 1 length of lemma. Apical sterile florets resembling fertile though underdeveloped.
FLOWER Lodicules 2; membranous. Anthers 3.
FRUIT Caryopsis with adherent pericarp. Hilum punctiform.
DISTRIBUTION North America: northwest USA and southwest USA.
NOTES Poeae. Man US Gr 1994.
Please cite this publication as detailed in How to Cite Version: 3rd February 2016.