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Descriptions

W.D. Clayton, M. Vorontsova, K.T. Harman & H. Williamson

© Copyright The Board of Trustees, Royal Botanic Gardens, Kew.

Calamagrostis gaoligongensis

HABIT Perennial; caespitose. Culms erect, or geniculately ascending; 10–32 cm long; 2–3 -noded. Ligule an eciliate membrane; 1.5–2.2 mm long. Collar glabrous. Leaf-blades 1.3–8 cm long; 0.5–2.2 mm wide. Leaf-blade surface ribbed; grooved adaxially; scabrous; rough adaxially.

INFLORESCENCE Inflorescence a panicle; comprising 5–60 fertile spikelets.

Panicle open, or contracted; pyramidal; equilateral; 1.6–7 cm long; bearing many spikelets, or few spikelets. Primary panicle branches 2–4 -nate; 0.7–4 cm long. Panicle branches scaberulous.

Spikelets solitary. Fertile spikelets pedicelled. Pedicels tip widened.

FERTILE SPIKELETS Spikelets comprising 1 fertile florets; with a barren rhachilla extension. Spikelets lanceolate; laterally compressed; 3.3–4.5 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus bearded. Floret callus hairs 2.5–3.5 mm long; 0.95–1.32 length of lemma.

GLUMES Glumes persistent; similar; exceeding apex of florets; firmer than fertile lemma; shiny; gaping. Lower glume lanceolate; 3.3–4.5 mm long; 1 length of upper glume; membranous; 1-keeled; 1 -veined. Lower glume lateral veins absent. Lower glume apex acute. Upper glume lanceolate; 3.1–4.4 mm long; 1.4 length of adjacent fertile lemma; membranous; 1-keeled; 3 -veined. Upper glume apex acuminate.

FLORETS Fertile lemma oblong; 2.2–2.8 mm long; hyaline; without keel; 5 -veined. Lemma lateral veins excurrent, or extending close to apex. Lemma apex dentate; awned; 1 -awned. Principal lemma awn dorsal; arising 0.33–0.5 way up back of lemma; geniculate; pungent to with clavate limb; 4.1–8.2 mm long overall; with a straight or slightly twisted column, or with twisted column. Palea 1.9–2.4 mm long; 0.77–0.91 length of lemma; hyaline. Rhachilla extension 0.5–0.85 mm long; glabrous, or pubescent; hairy at tip.

FLOWER Anthers 3; 0.6–0.9 mm long. Ovary glabrous.

FRUIT Caryopsis with adherent pericarp; oblong; 1.5 mm long.

DISTRIBUTION Asia-temperate: China.

NOTES Aveneae. Paszko & Pendry 2013.

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