Calamagrostis koelerioides
Calamagrostis bolanderi
dense-pine reed grass, fire reedgrass
Bolander's reed grass
(26)60-85(120) cm, unbranched, slightly scabrous;
nodes 2-3(5).
50-150 cm, unbranched, smooth or slightly scabrous beneath the panicles;
nodes 2-4.
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.
distributed along the culms;
sheaths and collars smooth or scabrous, glabrous;
ligules (2)3(5) mm, more or less obtuse, entire to lacerate;
blades (5)15-26(30) cm long, (2)3-7(10) mm wide, flat or involute, smooth or slightly 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.
(4)10-16(25) cm long, (2.5)4-5.5(6) cm wide, open, erect to nodding, pale green to bronze or purple;
branches (4)5.5-8(9) cm, sparsely scabrous, spreading to ascending, spikelets confined to the distal 1/4-1/2.
(4)4.5-6(7) mm;
rachilla prolongations 1.5-2.5(3) mm, hairs 1.5-2 mm.
3-4(5) mm;
rachilla prolongations 0.5-1 mm, hairs 1-1.5 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, keels scabrous distally, lateral veins obscure, apices acute;
callus hairs 0.5-1 mm, 0.2-0.4 times as long as the lemmas, appearing sparse primarily because of their shortness;
lemmas 2.5-3 mm, 0-1(2) mm shorter than the glumes;
awns 3.5-5(6) mm, attached to the lower 1/10 – 1/5 of the lemmas, usually exserted, strongly bent;
anthers (1.5)2-3 mm.
= 28.
= 56.
Calamagrostis koelerioides
Calamagrostis bolanderi
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 bolanderi grows in marshes, swamps, bogs, fens, seeps, moist meadows, open and closed coniferous and broadleaf forests, prairies, and coastal scrub, from sea level to 500 m. It is known only from sites near the coast in Humboldt, Mendocino, and Sonoma counties, California. It differs from C. breweri and C. muiriana in having leaves evenly distributed along the culms.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
CA
OR
Flora NW
PNW Herbaria
WildflowerSearch
iNaturalist
USDA Plants Database
