Agrostis sandwicensis

HABIT Perennial; caespitose; clumped densely. Culms erect; 30–50 cm long. Culm-internodes antrorsely scabrous. Leaf-sheaths antrorsely scabrous. Ligule an eciliate membrane; 3 mm long; acute. Leaf-blades involute; 1–2 mm wide. Leaf-blade surface scabrous.

INFLORESCENCE Inflorescence a panicle.

Panicle spiciform; linear; 5–10 cm long. Panicle branches scabrous.

Spikelets solitary. Fertile spikelets pedicelled. Pedicels scabrous.

FERTILE SPIKELETS Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets elliptic; laterally compressed; 3–4 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus glabrous.

GLUMES Glumes persistent; similar; exceeding apex of florets; firmer than fertile lemma; shiny; gaping. Lower glume lanceolate; 3–4 mm long; 1 length of upper glume; membranous; 1-keeled; 1 -veined. Lower glume primary vein scaberulous. Lower glume lateral veins absent. Lower glume surface scabrous. Lower glume apex acuminate. Upper glume lanceolate; 3–4 mm long; 1.5–2 length of adjacent fertile lemma; membranous; 1-keeled; 1 -veined. Upper glume primary vein scaberulous. Upper glume lateral veins absent. Upper glume surface scabrous. Upper glume apex acuminate.

FLORETS Fertile lemma oblong; 2 mm long; hyaline; without keel; 5 -veined. Lemma apex dentate; 4 -fid; muticous, or awned; 1 -awned. Principal lemma awn dorsal; arising 0.5 way up back of lemma; geniculate; 0.5–4 mm long overall; with twisted column. Palea absent or minute.

FLOWER Lodicules 2; membranous. Anthers 3.

FRUIT Caryopsis with adherent pericarp.

DISTRIBUTION Pacific: north-central.

NOTES Aveneae. Hitchcock 1993.

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