Calamagrostis lapponica
Calamagrostis bolanderi
calamagrostide de lapponie, Lapland reedgrass
Bolander's reed grass
(12)35-50(90) cm, unbranched, smooth beneath the panicles;
nodes 1-2(3).
50-150 cm, unbranched, smooth or slightly scabrous beneath the panicles;
nodes 2-4.
and collars usually smooth, rarely with short hairs;
ligules (0.5)2-4(5.5) mm, usually truncate, entire;
blades (4)8-18(26) cm long, (1.5)2-3.5(4) mm wide, flat to involute, abaxial surfaces usually smooth, rarely slightly scabrous, adaxial surfaces usually smooth or scabrous, rarely 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)8-11(16) cm long, (0.7)1-2(2.8) cm wide, mostly erect, loosely contracted, purple;
branches (2.1)2.5-3.5(5.4) cm, smooth or slightly scabrous, sometimes spikelet-bearing to the base, sometimes only on the distal 2/3.
(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.
(3.5)4-5(5.5) mm;
rachilla prolongations 0.4-1 mm, hairs 1.8-3 mm.
3-4(5) mm;
rachilla prolongations 0.5-1 mm, hairs 1-1.5 mm.
usually more than 3 times as long as wide, rounded to slightly keeled, usually purple for most of their length and smooth, keels rarely slightly scabrous, lateral veins obscure, apices acute to acuminate;
callus hairs (2)3-3.5(4.7) mm, (0.6)0.8-1(1.2) times as long as the lemmas, abundant;
lemmas (2.5)3-4(5) mm, 0.3-1.5 (2.3) mm shorter than the glumes;
awns 1.5-3 mm, attached to the lower 1/10 – 2/5 of the lemmas, usually not exserted, usually slender and similar to the callus hairs, sometimes stouter, straight to somewhat bent;
anthers (1.1)1.3-1.7(2) mm, usually poorly developed, sterile.
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, 42-112, 140.
= 56.
Calamagrostis lapponica
Calamagrostis bolanderi
Calamagrostis lapponica grows in northern and alpine tundra, particularly on ridgecrests and upper slopes, often with low shrubs including heathers, dwarf willows, and dwarf birch, usually on well-drained and coarse-textured (sand and gravel) soils, infrequently in meadows beside streams and lakeshores, very rarely in standing water, at 30-2300 m. It is circumboreal and circumpolar, ranging from Alaska to western Greeneland and Labrador, including the islands of the high arctic, south into the mountains of northern British Columbia and the west-central Rocky Mountains of Alberta. In Europe it extends south to about 60° N latitude, and in Asia south to North Korea.
Calamagrostis lapponica is sometimes easily confused with C. stricta (see next), but the two grow in different habitats. In addition, the glumes of C. lapponica have a smoother, more glossy appearance than those of C. stricta and are typically purple for most of their length, including the apices; the glumes of C. stricta are generally brown at the apices. A specimen from Nakat Inlet, Alaska (ALA #V116195, J. DeLapp and M. Duffy 93-339) appears to be C. lapponica, although it is in a very different habitat and at an unusually low elevation for the species.
(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.)
BC
PNW Herbaria
WildflowerSearch
iNaturalist
USDA Plants Database
CA
