Calamagrostis cuzcoensis

HABIT Perennial; caespitose. Culms 20–50 cm long; 2–3 -noded. Ligule an eciliate membrane; 0.5–2 mm long. Leaf-blades 3–13 cm long; 1–2 mm wide. Leaf-blade apex obtuse.

INFLORESCENCE Inflorescence a panicle.

Panicle open; elliptic; 7–10 cm long; 1–2 cm wide.

Spikelets solitary. Fertile spikelets pedicelled.

FERTILE SPIKELETS Spikelets comprising 1 fertile florets; with a barren rhachilla extension. Spikelets lanceolate; laterally compressed; 5–5.2 mm long; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes elongated below proximal fertile floret. Rhachilla elongation 0.6–0.8 mm long. Floret callus pilose. Floret callus hairs 2–2.5 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; 5–5.2 mm long; 1.4–1.6 length of adjacent fertile lemma; membranous; 1-keeled; 3 -veined. Upper glume apex acute.

FLORETS Fertile lemma lanceolate; 3.2–3.8 mm long; membranous; without keel. Lemma apex erose; awned; 1 -awned. Principal lemma awn dorsal; geniculate; 8–10 mm long overall; with a straight or slightly twisted column. Rhachilla extension 1.7–1.9 mm long; pilose.

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.