Calamagrostis emodensis

HABIT Perennial; caespitose. Rhizomes elongated. Culms erect; 80–130 cm long. Lateral branches lacking. Leaf-sheaths scaberulous. Ligule an eciliate membrane; 1–3(–5) mm long; obtuse. Leaf-blades 25–55 cm long; (4–)8–12 mm wide; glaucous. Leaf-blade surface scabrous; rough adaxially. Leaf-blade apex attenuate.

INFLORESCENCE Inflorescence a panicle. Peduncle smooth, or scaberulous above.

Panicle open; lanceolate, or ovate; effuse; nodding; 13–35 cm long.

Spikelets solitary. Fertile spikelets pedicelled.

FERTILE SPIKELETS Spikelets comprising 1 fertile florets; without rhachilla extension, or with a barren rhachilla extension. Spikelets lanceolate; laterally compressed; 5–8 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus bearded. Floret callus hairs 6–7 mm long; 2–3 length of lemma.

GLUMES Glumes persistent; similar; exceeding apex of florets; firmer than fertile lemma; gaping. Lower glume linear; 5–8 mm long; 1 length of upper glume; membranous; 1-keeled; 1 -veined. Lower glume primary vein smooth, or scaberulous. Lower glume lateral veins absent. Lower glume apex acuminate. Upper glume linear; 5–8 mm long; 2 length of adjacent fertile lemma; membranous; 1-keeled; 3 -veined. Upper glume apex acuminate.

FLORETS Fertile lemma oblong; 2.5–4 mm long; hyaline; without keel; 5 -veined. Lemma apex dentate; 2 -fid; truncate; awned; 1 -awned. Principal lemma awn dorsal; arising 0.5–0.66 way up back of lemma; geniculate; 4–9 mm long overall; 1.5–2.5 length of lemma; clearly exserted from spikelet; with twisted column. Palea 2.5 mm long; hyaline; 2 -veined.

FLOWER Lodicules 2. Anthers 3. Stigmas 2.

FRUIT Caryopsis with adherent pericarp. Hilum punctiform.

DISTRIBUTION Asia-temperate: western Asia and China. Asia-tropical: India.

NOTES Aveneae. Fl Pak 1993.

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