Oregon Bent

Agrostis oregonensis Vasey, Bull. Torrey Club 13: 55. 1886
Agrostis allenuala Vasey, Bot. Gaz. 11: 337. 1886. (Mount Hood, Oregon, Ho-well 210.)
Agrostis Hallii var. californica Vasey, Contr. U. S. Nat. Herb. 3: 74. 1892. (Type from California,
Bolander 6103.) »
Agrostis Schiedeana var. armata Suksdorf, Werdenda l 2 : 1. 1923. (Type from Klickitat County,
Washington, Suksdorf 6310.)
Perennial; culms erect, cespitose, glabrous, 60-90 cm. tall; sheaths glabrous or scaberulous; ligule acute, 2-4 mm. long; blades flat, scabrous, 2-4 mm. wide; panicle oblong, open, 10-30 cm. long, rather narrow, the branches verticillate, capillary, scabrous, usually rather stiffly ascending, unequal, naked on the lower half; glumes acuminate, scabrous on the keel and scaberulous on the back, 2.5-3 mm. long; lemma 1.5 mm. long, awnless; palea about 0.5 mm. long.
Type locality: Oregon {Hoivell 49).
Distribution: Marshes, bogs, and wet meadows. Montana to British Columbia, and southward to Wyoming and California.

Perennials, Terrestrial, not aquatic, Stems nodes swollen or brittle, Stems erect or ascending, Stems caespitose, tufted, or clustered, Stems terete, round in cross section, or polygonal, Stem internodes hollow, Stems with inflorescence less than 1 m tall, Stems, culms, or scapes exceeding basal leaves, Leaves mostly basal, below middle of stem, Leaves conspicuously 2-ranked, distichous, Leaves sheathing at base, Leaf sheath mostly open, or loose, Leaf sheath smooth, glabrous, Leaf sheath and blade differentiated, Leaf blades linear, Leaf blades 2-10 mm wide, Leaf blades mostly flat, Leaf blade margins folded, involute, or conduplicate, Leaf blades mostly glabrous, Leaf blades more or less hairy, Ligule present, Ligule an unfringed eciliate membrane, Inflorescence terminal, Inflorescence an open panicle, openly paniculate, branches spreading, Inflorescence solitary, with 1 spike, fascicle, glomerule, head, or cluster per stem or culm, Inflorescence branches more than 10 to numerous, Lower panicle branches whorled, Flowers bisexual, Spikelets laterally compressed, Spikelet less than 3 mm wide, Spikelets with 1 fertile floret, Spikelets solitary at rachis nodes, Spikelets all alike and fertille, Spikelets bisexual, Spikelets disarticulating above the glumes, glumes persistent, Spikelets disarticulating beneath or between the florets, Rachilla or pedicel glabrous, Glumes present, empty bracts, Glumes 2 clearly present, Glumes equal or subequal, Glumes equal to or longer than adjacent lemma, Glume equal to or longer than spikelet, Glumes 1 nerved, Lemmas thin, chartaceous, hyaline, cartilaginous, or membranous, Lemma 5-7 nerved, Lemma glabrous, Lemma apex truncate, rounded, or obtuse, Lemma awnless, Lemma margins thin, lying flat, Lemma straight, Callus or base of lemma evidently hairy, Callus hairs shorter than lemma, Palea present, well develope d, Palea membranous, hyaline, Palea shorter than lemma, Stamens 3, Styles 2-fid, deeply 2-branched, Stigmas 2, Fruit - caryopsis, Caryopsis ellipsoid, longitudinally grooved, hilum long-linear.

Agrostis oregonensis is a species of grass known by the common name Oregon bent grass. It is native to western North America from Alaska to California to Wyoming, where it grows in several habitat types.