Common names: Hovell's reedgrass
Endemic
Treatment appears in FNA Volume 24. Treatment on page 712.

Plants sometimes with sterile culms; usually densely cespitose, occasionally with rhizomes shorter than 1 cm. Culms (25) 35^45 (60) cm, unbranched, smooth or slightly scabrous beneath the panicles; nodes 1-2. Sheaths 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. Panicles (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. Spikelets (5.5) 6-8 mm; rachilla prolongations 1-1.5 (2) mm, hairs (1.5) 2-2.5 (3) mm. Glumes 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. 2n = 28.

Discussion

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.

Selected References

None.

Lower Taxa

None.

"decumbent" is not a number.

... more about "Calamagrostis howellii"
membranous +  and scarious +
hairy +, glabrous +  and scabrous +
2 cm20 mm <br />0.02 m <br /> (?) +
0.25 cm2.5 mm <br />0.0025 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
Kendrick L. Marr +, Richard J. Hebda +  and Craig W. Greenef +
Adans. +
1 (?) +  and 3 (?) +
10 cm100 mm <br />0.1 m <br /> (?) +
straight +
attached +
exserted +  and lower +
distinguished +
1/5 +  and 2/5 +
1.3 cm13 mm <br />0.013 m <br /> (1.6 cm16 mm <br />0.016 m <br />) +
keeled +  and rounded +
pseudopetiolate +  and branching +
intravaginal +, extravaginal +, branching +  and basal +
swelling +
12 cm120 mm <br />0.12 m <br /> (20 cm200 mm <br />0.2 m <br />) +
not evident +
flat +  and involute +
1mm;2.5mm +
2 cm20 mm <br />0.02 m <br /> (?) +
appressed;more or less drooping +
spikelike +
0.4-0.6(0.7) times as long as the lemmas +
0.2 cm2 mm <br />0.002 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
Hovell's reedgrass +
ascending +  and erect +
45 cm450 mm <br />0.45 m <br /> (?) +
not woody +
Oreg. +  and Wash. +
1/4 +  and 1/3 +
liquid +, soft +  and hard +
capillary +
pistillate +  and staminate +
sometimes longer +
sterile +  and bisexual +
compressed +
reduced +
subtending +
rounded +  and slightly keeled +
subequal +
membranous +
1.5 cm15 mm <br />0.015 m <br /> (?) +
sparse +  and abundant +
uncinate +
0.2 cm2 mm <br />0.002 m <br /> (0.25 cm2.5 mm <br />0.0025 m <br />) +
raised +  and prominent +
lanceolate +  and ovate +
2 cm20 mm <br />0.02 m <br /> (0.45 cm4.5 mm <br />0.0045 m <br />) +
lacerate +  and acute +
0.35 cm3.5 mm <br />0.0035 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
membranous +
inconspicuous +
lanceolate +
concealed +  and prominent +
1 +  and 2 +
2 +  and 1 +
hairy +  and glabrous +
2-keeled +
green +  and purplish +
7cm +  and 12cm +
spikelike +
3.5 cm35 mm <br />0.035 m <br /> (6.5 cm65 mm <br />0.065 m <br />) +
dry +  and fleshy +
compressed +
0.6 cm6 mm <br />0.006 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
1 (?) +  and 3 (?) +
simple +  and compound +
2 (?) +  and 3 (?) +
Gramineae +
Calamagrostis howellii +
Calamagrostis +
species +
membranous +
parallel +  and converging +
obscure +  and prominent +
plant +  and cespitose +
aquatic +  and terrestrial +