Calamagrostis cainii

Hitchc.
Common names: Cain's reedgrass
Endemic
Treatment appears in FNA Volume 24. Treatment on page 719.

Plants sometimes with sterile culms; densely cespitose, without obvious rhizomes. Culms (30) 45-55 (60) cm, unbranched, smooth beneath the panicles; nodes 1-3. Sheaths and collars smooth; ligules 0.5-1.5 (2) mm, usually truncate, sometimes obtuse, entire; blades (5) 15-30 (39) cm long, (1) 2-3 (4) mm wide, flat, pale green, abaxial surfaces smooth, adaxial surfaces slightly scabrous, glabrous or sparsely hairy. Panicles (6) 8-12 (15) cm long, 1.5-3.5 (4) cm wide, open, often drooping, pale green and purple; branches (2) 2.5-4.5 (5) cm, smooth or slightly scabrous, spikelets usually confined to the distal 1/2-2/3. Spikelets 4-5 (6) mm; rachilla prolongations 1-2 mm, hairs 1.5-2 mm. Glumes rounded to slightly keeled, usually smooth, keels rarely finely scabrous distally, lateral-veins obscure, apices acute to acuminate; callus hairs 1.5-2 mm, 0.3-0.5 times as long as the lemmas, abundant; lemmas 3.5-4.5 mm, 0.5-1 mm shorter than the glumes; awns 4-5 (6) mm, attached from near the base to the lower 1/3 of the lemmas, exserted, stout and easily distinguished from the callus hairs, strongly bent; anthers (1) 2-2.5 mm. 2n = 28.

Discussion

Calamagrostis cainii grows on bouldery subtrates and in soil pockets, landslides, and disturbed sites, at 1200-2100 m. It has been found in only three locations: the slopes of Mount LeConte, Sevier County, Tennessee; and in North Carolina on Craggy Pinnacle, Buncombe County, and the summit of Mount Craig, Yancey County. The species is of conservation concern because of its limited distribution.

Selected References

None.

Lower Taxa

None.

"decumbent" is not a number.

... more about "Calamagrostis cainii"
membranous +  and scarious +
hairy +, glabrous +  and scabrous +
1 cm10 mm <br />0.01 m <br /> (?) +
0.2 cm2 mm <br />0.002 m <br /> (0.25 cm2.5 mm <br />0.0025 m <br />) +
Acute (?) +  and Acuminate (?) +
Kendrick L. Marr +, Richard J. Hebda +  and Craig W. Greenef +
Hitchc. +
1 (?) +  and 3 (?) +
6 cm60 mm <br />0.06 m <br /> (?) +
straight +
attached +
exserted +
distinguished +
0.4 cm4 mm <br />0.004 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
keeled +  and rounded +
pseudopetiolate +  and branching +
swelling +
15 cm150 mm <br />0.15 m <br /> (30 cm300 mm <br />0.3 m <br />) +
not evident +
flat +  and involute +
2mm;3mm +
2 cm20 mm <br />0.02 m <br /> (?) +
appressed;more or less drooping +
spikelike +
0.3-0.5 times as long as the lemmas +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
Cain's reedgrass +
ascending +  and erect +
45 cm450 mm <br />0.45 m <br /> (55 cm550 mm <br />0.55 m <br />) +
not woody +
Tenn. +  and N.C. +
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 +
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 />) +
entire +  and truncate +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.15 cm1.5 mm <br />0.0015 m <br />) +
membranous +
inconspicuous +
lanceolate +
concealed +  and prominent +
1 +  and 3 +
2 +  and 1 +
hairy +  and glabrous +
2-keeled +
pale green and purple +
8cm +  and 12cm +
spikelike +
1.5 cm15 mm <br />0.015 m <br /> (3.5 cm35 mm <br />0.035 m <br />) +
dry +  and fleshy +
1/2 +  and 2/3 +
compressed +
0.4 cm4 mm <br />0.004 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
1 (?) +  and 3 (?) +
simple +  and compound +
2 (?) +  and 3 (?) +
Gramineae +
Calamagrostis cainii +
Calamagrostis +
species +
membranous +
parallel +  and converging +
obscure +  and prominent +
plant +  and cespitose +
aquatic +  and terrestrial +