Calamagrostis breweri

Thurb.
Common names: Shorthair reedgrass
Endemic
Treatment appears in FNA Volume 24. Treatment on page 717.

Plants sometimes with sterile culms; densely cespitose, often with rhizomes to 5 cm long, 1-2 mm thick. Culms (18) 29-54 cm, unbranched, smooth beneath the panicles; nodes 1-2 (3). Leaves basally concentrated; sheaths and collars smooth or slightly scabrous; ligules 1.7-4.1 (6) mm, usually lacerate; blades (2) 10-15 cm long, 0.9-1.7 mm wide when flat, 0.4-0.6 mm in diameter when dry and involute, abaxial surfaces scabrous, adaxial surfaces sparsely hairy. Panicles (4) 5.7-8.5 cm long, 0.7-5.2 cm wide, usually open, sometimes contracted, mostly erect, dark purple; branches (1) 2-3 (3.5) cm, smooth, spikelets usually confined to the ends of the branches. Spikelets 3-5 mm; rachilla prolongations about 1.5 mm, hairs 1.5-2 mm. Glumes rounded, usually smooth, occasionally scabrous at the apices, lateral-veins obscure, apices acute to attenuate; callus hairs 0.3-1.2 mm, 0.2-0.5 times as long as the lemmas, sparse; lemmas 2.5-4 mm, 0.5-1 mm shorter than the glumes; awns 3.5-5.5 mm, attached to the lower 1/10 – 3/10 of the lemmas, exserted, bent; anthers 1.3-2.6 mm. 2n = 42.

Discussion

Calamagrostis breweri grows in moist subalpine and alpine meadows, lake margins, and stream banks, at 1700-2600 m, from Mount Hood in Oregon south to north of the Carson Pass area in Alpine and Amador counties, California. It differs from C. bolanderi (p. 719) in having basally concentrated leaves.

Selected References

None.

Lower Taxa

None.

"decumbent" is not a number.

... more about "Calamagrostis breweri"
membranous +  and scarious +
0.13 cm1.3 mm <br />0.0013 m <br /> (0.26 cm2.6 mm <br />0.0026 m <br />) +
Acute (?) +  and Attenuate (?) +
Kendrick L. Marr +, Richard J. Hebda +  and Craig W. Greenef +
Thurb. +
1 (?) +  and 3 (?) +
straight +
attached +
exserted +  and lower +
indistinct +
1/10 +  and 3/10 +
0.35 cm3.5 mm <br />0.0035 m <br /> (0.55 cm5.5 mm <br />0.0055 m <br />) +
keeled +  and rounded +
pseudopetiolate +  and branching +
intravaginal +, extravaginal +, branching +  and basal +
swelling +
0.04 cm0.4 mm <br />4.0e-4 m <br /> (0.06 cm0.6 mm <br />6.0e-4 m <br />) +
10 cm100 mm <br />0.1 m <br /> (15 cm150 mm <br />0.15 m <br />) +
not evident +
flat +  and involute +
0.9mm;1.7mm +
1 cm10 mm <br />0.01 m <br /> (?) +
appressed;more or less drooping +
spikelike +
0.2-0.5 times as long as the lemmas +
0.03 cm0.3 mm <br />3.0e-4 m <br /> (0.12 cm1.2 mm <br />0.0012 m <br />) +
Shorthair reedgrass +
ascending +  and erect +
29 cm290 mm <br />0.29 m <br /> (54 cm540 mm <br />0.54 m <br />) +
not woody +
Calif. +  and Oreg. +
1/4 +  and 1/3 +
liquid +, soft +  and hard +
capillary +
pistillate +  and staminate +
sometimes longer +
sterile +  and bisexual +
compressed +
reduced +
subtending +
rounded +
subequal +
membranous +
sparse +  and abundant +
uncinate +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
lanceolate +  and ovate +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.1 cm1 mm <br />0.001 m <br />) +
lacerate +
0.17 cm1.7 mm <br />0.0017 m <br /> (0.41 cm4.1 mm <br />0.0041 m <br />) +
membranous +
inconspicuous +
lanceolate +
concealed +  and prominent +
1 +  and 2 +
2 +  and 1 +
hairy +  and glabrous +
2-keeled +
5.7cm +  and 8.5cm +
spikelike +
0.7 cm7 mm <br />0.007 m <br /> (5.2 cm52 mm <br />0.052 m <br />) +
dry +  and fleshy +
1 +  and 60 +
compressed +
0.3 cm3 mm <br />0.003 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
1 (?) +  and 3 (?) +
simple +  and compound +
2 (?) +  and 3 (?) +
Gramineae +
Calamagrostis breweri +
Calamagrostis +
species +
membranous +
parallel +  and converging +
obscure +  and prominent +
plant +  and cespitose +
aquatic +  and terrestrial +