Calamagrostis koelerioides
Calamagrostis howellii
dense-pine reed grass, fire reedgrass
Hovell's reedgrass, Howell's reedgrass
(26)60-85(120) cm, unbranched, slightly scabrous;
nodes 2-3(5).
(25)35^45(60) cm, unbranched, smooth or slightly scabrous beneath the panicles;
nodes 1-2.
and collars usually scabrous, rarely smooth, glabrous;
ligules (1.5) 2-4.5(7) mm, truncate to obtuse, entire or sometimes lacerate;
blades (2)9-20(30) cm long, (2)2.5-4.5(8) mm wide, flat, slightly scabrous, adaxial surfaces glabrous or sparsely hairy.
and collars smooth;
ligules (2.5)3.5-6 mm, acute, lacerate;
blades (9)12-20(25) cm long, 1-2.5(3) mm wide, flat to involute, abaxial surfaces smooth, adaxial surfaces finely scabrous, glabrous or sparsely hairy.
(4)10-13(16) cm long, about 1 cm wide, contracted, erect to slightly nodding, often slightly interrupted towards the base, straw-colored or pale green to pale purple;
branches (1.1)2.8-4(6) cm, scabrous, spikelet-bearing to the base.
(5)7-12(15) cm long, (2)3.5-6.5(8) cm wide, loose, open, straw-colored or green to purplish;
branches (2)3.5-5(7) cm, smooth or sparsely scabrous, spikelets usually confined to the distal 1/2.
(4)4.5-6(7) mm;
rachilla prolongations 1.5-2.5(3) mm, hairs 1.5-2 mm.
(5.5)6-8 mm;
rachilla prolongations 1-1.5(2) mm, hairs (1.5)2-2.5(3) mm.
slightly keeled, keels smooth or slightly scabrous distally, lateral veins visible but not prominent, apices acute;
callus hairs 1.5-2 mm, 0.3-0.4 times as long as the lemmas, sparse;
lemmas (3.5)4-5(6) mm, 0.5-1.5 mm shorter than the glumes;
awns 4-5.5 mm, attached to the lower 1/10 – 1/5 of the lemmas, exserted, sometimes barely so, stout, distinguishable from the callus hairs, bent;
anthers 2-3.5 mm.
rounded to slightly keeled, smooth or scabrous distally, lateral veins usually prominent and raised, apices acuminate;
callus hairs 2-3(4.5) mm, 0.4-0.6(0.7) times as long as the lemmas, abundant;
lemmas 4.5-5 mm, about 2 mm shorter than the glumes;
awns (10)13-16 mm, attached to the lower 1/5 – 2/5 of the lemmas, exserted, stout, easily distinguished from the callus hairs, strongly bent;
anthers (2)2.5-3(4) mm.
= 28.
= 28.
Calamagrostis koelerioides
Calamagrostis howellii
Calamagrostis koelerioides grows in mountain meadows, chaparral, and Jeffrey pine and blue spruce forests, and on talus slopes, dry hills, and ridges, occasionally on serpentine soils, at 50-2100 m. It extends from Washington south to southern California and east to Montana and western Wyoming.
Calamagrostis koelerioides is similar to C. rubescens (p. 723). The two have traditionally been distinguished by the presence of hairs on the leaf collars in C. rubescens, and their absence in C. koelerioides; a more reliable differentiation is the longer lemmas, glumes, and awns of C. koelerioides compared to C. rubescens.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
Calamagrostis howellii grows on dry rocky slopes, banks, ledges, and in cliff crevices, sometimes on basalt, from 100-500 m. It grows only in the Columbia River Gorge of Washington and Oregon.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
CA
OR
Flora NW
PNW Herbaria
WildflowerSearch
iNaturalist
USDA Plants Database
WA
