Calamagrostis mulleri

HABIT Perennial; caespitose. Culms erect; 20–30 cm long. Lateral branches lacking. Leaves mostly basal. Leaf-sheaths smooth; glabrous on surface. Ligule an eciliate membrane; 5–6 mm long; acute. Leaf-blades 3–8 cm long; 3–4 mm wide. Leaf-blade surface scaberulous. Leaf-blade margins ciliate.

INFLORESCENCE Inflorescence a panicle.

Panicle contracted; lanceolate; 3–8 cm long; 1–1.5 cm wide. Primary panicle branches ascending.

Spikelets solitary. Fertile spikelets pedicelled.

FERTILE SPIKELETS Spikelets comprising 1 fertile florets; with a barren rhachilla extension. Spikelets lanceolate; laterally compressed; 4.5 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus pubescent. Floret callus hairs 0.1 length of lemma.

GLUMES Glumes persistent; similar; exceeding apex of florets; firmer than fertile lemma; gaping. Lower glume lanceolate; 4.5 mm long; 1.1 length of upper glume; membranous; purple; 1-keeled; 1 -veined. Lower glume primary vein scabrous. Lower glume lateral veins absent. Lower glume apex acute. Upper glume lanceolate; 4 mm long; 1.1 length of adjacent fertile lemma; membranous; purple; 1-keeled; 1–3 -veined. Upper glume primary vein scabrous. Upper glume lateral veins absent, or obscure. Upper glume apex acute.

FLORETS Fertile lemma oblong; 3.5–3.7 mm long; membranous; without keel; 5 -veined. Lemma lateral veins obscure. Lemma apex dentate; 4 -fid; with lobes 0.5 mm long; awned; 1 -awned. Principal lemma awn dorsal; arising 0.5 way up back of lemma; geniculate; 4–5 mm long overall; with twisted column. Rhachilla extension 0.2–0.25 length of fertile floret; pilose.

FLOWER Lodicules 2. Anthers 3. Stigmas 2.

FRUIT Caryopsis with adherent pericarp. Hilum punctiform. Disseminule comprising a floret.

DISTRIBUTION South America: northern South America.

NOTES Aveneae. Luces 1996.

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