Calamagrostis cinnoides

(Muhl.) W.P.C. Barton
Common names: Small reedgrass
Endemic
Synonyms: Calamagrostis coarctata Agrostis glauca
Treatment appears in FNA Volume 24. Treatment on page 716.

Plants without sterile culms; loosely cespitose, with rhizomes 2-3 cm long. Culms (60) 80-140 (170) cm, often solitary, unbranched, scabrous; nodes 3-5 (6). Sheaths smooth or slightly scabrous; collars smooth to densely scabrous; ligules (2) 3-4 (6) mm, usually truncate, rarely obtuse, usually entire, sometimes lacerate; blades (8) 10-35 (45) cm long, (3) 3.5-7.5 (10) mm wide, flat, pale green, smooth or slightly scabrous, adaxial surfaces glabrous or sparsely hairy. Panicles (8) 12-20 (25) cm long, (0.8) 1.5-2.5 (3) cm wide, erect, contracted, green to greenish purple; branches (2.5) 4-7 cm, sparsely to densely scabrous, some prickles more than 10 times the length of the others, spikelets usually confined to the distal 1/2-1/4. Spikelets 5-7 (7.5) mm; rachilla prolongations about (0.5) 1 (1.5) mm, hairy only distally, hairs 2-4 mm. Glumes keeled, keels slightly scabrous, lateral-veins prominent, apices acuminate, sometimes shortly awned; callus hairs 3-4 mm, 0.5-0.7 times as long as the lemmas, abundant; lemmas 4.5-5.5 mm, 1-2 mm shorter than the glumes; awns 1-2 mm, attached on the upper 2/5 of the lemmas, not exserted, straight; anthers about 1.5 mm. 2n = unknown.

Discussion

Calamagrostis cinnoides is found on roadsides, in ditches, pond edges, and boggy streamhead seepages, and along streams in oak or oak-pine woods on sandy to peaty soils, at 5-1100 m. Its range extends throughout eastern North America, from Nova Scotia and Maine to Georgia and Louisiana. It is adventive in Ohio.

Since Arundo canadensis Michx. was cited as a synonym for both Arundo cinnoides Muhl. and Calamagrostis cinnoides, both of these latter combinations are considered to be superfluous—and thus illegitimate—names, even though they differ taxonomically from A. canadensis Michx. A proposal is in preparation to conserve the name C. cinnoides over the less frequently used, but legitimate, combination C. coarctata Eaton.

Selected References

None.

Lower Taxa

None.

"decumbent" is not a number.

... more about "Calamagrostis cinnoides"
membranous +  and scarious +
hairy +  and glabrous +
1.5 cm15 mm <br />0.015 m <br /> (?) +
Kendrick L. Marr +, Richard J. Hebda +  and Craig W. Greenef +
(Muhl.) W.P.C. Barton +
1 (?) +  and 3 (?) +
straight +
attached +
not exserted +
indistinct +
0.1 cm1 mm <br />0.001 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
keeled +  and rounded +
pseudopetiolate +  and branching +
intravaginal +, extravaginal +, branching +  and basal +
swelling +
10 cm100 mm <br />0.1 m <br /> (35 cm350 mm <br />0.35 m <br />) +
not evident +
flat +  and involute +
3.5mm;7.5mm +
2.5 cm25 mm <br />0.025 m <br /> (?) +
appressed;more or less drooping +
spikelike +
0.5-0.7 times as long as the lemmas +
0.3 cm3 mm <br />0.003 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
Small reedgrass +
ascending +  and erect +
80 cm800 mm <br />0.8 m <br /> (140 cm1,400 mm <br />1.4 m <br />) +
not woody +
Conn. +, N.J. +, N.Y. +, Wash. +, Va. +, Del. +, Oreg. +, Wis. +, Colo. +, D.C +, Utah +, W.Va. +, Pacific Islands (Hawaii) +, Kans. +, N.Dak. +, Nebr. +, S.Dak. +, Mass. +, Maine +, N.H. +, R.I. +, Vt. +, Wyo. +, N.Mex. +, La. +, N.C. +, Tenn. +, S.C. +, Pa. +, Ind. +, Ky. +, Calif. +, Nev. +, Iowa +, Mont. +, Alaska +, Ala. +, Ariz. +, Idaho +, Ill. +, Md. +, Mich. +, Minn. +, Ohio +, Ark. +, Ga. +, Alta. +, B.C. +, Greenland +, Man. +, N.B. +, Nfld. and Labr. +, N.S. +, N.W.T. +, Nunavut +, Ont. +, P.E.I. +, Que. +, Sask. +, Yukon +  and Mo. +
1/4 +  and 1/3 +
liquid +, soft +  and hard +
capillary +
pistillate +  and staminate +
sometimes longer +
sterile +  and bisexual +
compressed +
reduced +
subtending +
subequal +
membranous +
sparse +  and abundant +
uncinate +
0.2 cm2 mm <br />0.002 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
lanceolate +  and ovate +
0.1 cm1 mm <br />0.001 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
entire +  and truncate +
lacerate +  and obtuse +
0.3 cm3 mm <br />0.003 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
membranous +
inconspicuous +
lanceolate +
concealed +  and prominent +
3 +  and 5 +
2 +  and 1 +
hairy +  and glabrous +
2-keeled +
green +  and greenish purple +
12cm +  and 20cm +
spikelike +
1.5 cm15 mm <br />0.015 m <br /> (2.5 cm25 mm <br />0.025 m <br />) +
dry +  and fleshy +
1/2 +  and 1/4 +
compressed +
0.5 cm5 mm <br />0.005 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
1 (?) +  and 3 (?) +
simple +  and compound +
2 (?) +  and 3 (?) +
Calamagrostis coarctata +  and Agrostis glauca +
Calamagrostis cinnoides +
Calamagrostis +
species +
membranous +
parallel +  and converging +
obscure +  and prominent +
plant +  and cespitose +
aquatic +  and terrestrial +