Calamagrostis koelerioides
Calamagrostis pickeringii
dense-pine reed grass, fire reedgrass
calamagrostide de Pickering, Pickering's reed bentgrass, Pickering's reed grass
(26)60-85(120) cm, unbranched, slightly scabrous;
nodes 2-3(5).
(17)25-55(90) cm, solitary or in small clusters, unbranched, sparsely scabrous;
nodes 1-3.
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 2-3(5) mm, truncate to obtuse, entire, sometimes weakly lacerate;
blades (3)6-17(38) cm long, (2)3-4(7) mm wide, flat, stiff, abaxial surfaces smooth or scabrous, adaxial surfaces 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.
(3.5)5-12(15) cm long, (0.5)1-2(3.5) cm wide, contracted, erect, greenish to purplish;
branches (1.5)2-3(4) cm, sparsely scabrous, usually spikelet-bearing on the distal 1/2 - 2/3, sometimes to the base.
(4)4.5-6(7) mm;
rachilla prolongations 1.5-2.5(3) mm, hairs 1.5-2 mm.
(2.5)3-4(4.5) mm;
rachilla prolongations 0.2-1.3(1.5) mm, sparsely bearded, hairs about 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.
keeled, usually scabrous on the keel tips, lateral veins obscure, not raised, apices acute;
callus hairs (0.3)0.5-1 mm, 0.2-0.3 times as long as the lemmas, sparse;
lemmas 2.5-3(3.5) mm, (0)0.5-1 mm shorter than the glumes;
awns 1.5-2(2.5) mm, attached to the lower 2/5 – 3/5 of the lemmas, sometimes slightly exserted, distinct from the callus hairs, bent;
anthers 1.5-2 mm.
= 28.
= 28.
Calamagrostis koelerioides
Calamagrostis pickeringii
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 pickeringii grows in bogs, open white spruce scrub, wet meadows, coastal peatlands and lake shores, heaths, frost pockets (hollows), pitch pine barrens, and on sandy beaches, at 0-1600 m. It is found from Newfoundland and Nova Scotia south to the mountains of New Hampshire, New York, and New Jersey.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
CA
OR
Flora NW
PNW Herbaria
WildflowerSearch
iNaturalist
USDA Plants Database
Go Botany
