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Descriptions
W.D. Clayton, M. Vorontsova, K.T. Harman & H. Williamson
© Copyright The Board of Trustees, Royal Botanic Gardens, Kew.
Colpodium ponticum
HABIT Perennial; caespitose. Rhizomes short. Butt sheaths persistent and investing base of culm; with fibrous dead sheaths. Culms 20–40 cm long. Ligule an eciliate membrane. Leaf-blades conduplicate; 5–12 cm long; 1–2.5 mm wide. Leaf-blade surface glabrous.
INFLORESCENCE Inflorescence a panicle.
Panicle open; lanceolate, or ovate; 4–10 cm long; 2.5–6 cm wide. Primary panicle branches 2 -nate. Panicle branches capillary.
Spikelets solitary. Fertile spikelets pedicelled.
FERTILE SPIKELETS Spikelets comprising 3–4 fertile florets; without rhachilla extension. Spikelets cuneate; laterally compressed; 5–7 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus woolly.
GLUMES Glumes persistent; similar; shorter than spikelet; similar to fertile lemma in texture; gaping. Lower glume lanceolate, or oblong; 4–4.5 mm long; 1 length of upper glume; membranous; much thinner above; much thinner on margins; purple; 1-keeled; keeled below; 1 -veined. Lower glume lateral veins absent. Lower glume apex acute. Upper glume lanceolate, or oblong; 4.5–5.2 mm long; 1 length of adjacent fertile lemma; membranous; much thinner above; with hyaline margins; purple; 1-keeled; keeled below; 3 -veined. Upper glume lateral veins all falling short of apex. Upper glume apex obtuse.
FLORETS Fertile lemma oblong; 4.2–4.6 mm long; membranous; much thinner above; purple; keeled; 3 -veined. Lemma lateral veins less than two thirds length of lemma. Lemma surface pubescent; hairy below; hairy on veins. Lemma apex erose; obtuse. Palea 0.75 length of lemma. Palea keels smooth; eciliate.
FLOWER Anthers 3; 2.1–2.2 mm long.
FRUIT Hilum elliptic.
DISTRIBUTION Asia-temperate: Caucasus and western Asia.
NOTES Poeae. Fl Turk 1993.
Please cite this publication as detailed in How to Cite Version: 3rd February 2016.