Calamagrostis boyacensis

HABIT Perennial; caespitose. Culms 20–30 cm long. Ligule an eciliate membrane; 10–17 mm long. Leaf-blades flat, or involute; 5–11 cm long; 2–3 mm wide. Leaf-blade surface glabrous. Leaf-blade apex acute.

INFLORESCENCE Inflorescence a panicle.

Panicle contracted; elliptic; interrupted; 6–10 cm long; 2–3 cm wide.

Spikelets solitary. Fertile spikelets pedicelled.

FERTILE SPIKELETS Spikelets comprising 1 fertile florets; with a barren rhachilla extension. Spikelets lanceolate; laterally compressed; 6–7 mm long; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes elongated below proximal fertile floret. Rhachilla elongation 0.5 mm long. Floret callus bearded. Floret callus hairs 4.5 mm long.

GLUMES Glumes persistent; similar; exceeding apex of florets; firmer than fertile lemma. Lower glume lanceolate; 1 length of upper glume; membranous; 1-keeled; 1 -veined. Lower glume lateral veins absent. Lower glume apex acute. Upper glume lanceolate; 6–7 mm long; 2.4–2.5 length of adjacent fertile lemma; membranous; 1-keeled; 3 -veined. Upper glume apex acute.

FLORETS Fertile lemma lanceolate; 2.5–2.8 mm long; membranous; without keel. Lemma apex erose; awned; 1 -awned. Principal lemma awn dorsal; arising 0.1 way up back of lemma; straight; 6–8 mm long overall. Rhachilla extension pilose; with 3–4 mm long hairs.

FLOWER Lodicules 2. Anthers 3. Stigmas 2.

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

DISTRIBUTION South America: western South America.

NOTES Aveneae. Tovar 1995.

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