Calamagrostis killipii

HABIT Perennial; caespitose. Culms erect; 20–28 cm long. Leaf-sheaths longer than adjacent culm internode; glabrous on surface, or puberulous. Ligule an eciliate membrane; 0.8 mm long; erose. Leaf-blades erect; involute; 6–15 cm long. Leaf-blade venation prominent. Leaf-blade surface scabrous; rough adaxially; glabrous. Leaf-blade margins ciliate; hairy at base.

INFLORESCENCE Inflorescence a panicle.

Panicle contracted; linear; 5–8 cm long; 0.8–1.2 cm wide. Primary panicle branches appressed.

Spikelets solitary. Fertile spikelets pedicelled.

FERTILE SPIKELETS Spikelets comprising 1 fertile florets; with a barren rhachilla extension. Spikelets lanceolate; laterally compressed; 6.5–7.5 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus pilose. Floret callus hairs 1 mm long; 0.2 length of lemma.

GLUMES Glumes persistent; similar; exceeding apex of florets; firmer than fertile lemma; gaping. Lower glume lanceolate; 6.5–7.5 mm long; 1 length of upper glume; membranous; much thinner above; purple; 1-keeled. Lower glume apex acuminate. Upper glume lanceolate; 6.5–7.5 mm long; 1.3–1.5 length of adjacent fertile lemma; membranous; much thinner above; purple; 1-keeled. Upper glume apex acuminate.

FLORETS Fertile lemma lanceolate; 5 mm long; membranous; without keel; 5 -veined. Lemma apex dentate; 2 -fid; awned; 1 -awned. Principal lemma awn dorsal; arising 0.5 way up back of lemma; straight; 7 mm long overall; with twisted column. Rhachilla extension 3 mm long; villous; hairy throughout but longer above; with 7 mm long hairs.

FLOWER Anthers 3.

FRUIT Caryopsis with adherent pericarp.

DISTRIBUTION South America: western South America.

NOTES Aveneae. Swallen 2004.

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