Calamagrostis pickeringii

A. Gray
Common names: Pickering's reed bentgrass Calamagrostide de pickering
Endemic
Synonyms: Calamagrostis pickeringii var. debilis
Treatment appears in FNA Volume 24. Treatment on page 724.

Plants without sterile culms; weakly cespitose, with rhizomes 2-8 cm long, about 1.5 mm thick. Culms (17) 25-55 (90) cm, solitary or in small clusters, unbranched, sparsely scabrous; nodes 1-3. Sheaths and collars smooth; ligules 2-3 (5) mm, truncate to obtuse, entire, sometimes weakly lacerate; blades (3) 6-17 (38) cm long, (2) 3-4 (7) mm wide, flat, stiff, abaxial surfaces smooth or scabrous, adaxial surfaces slightly scabrous, glabrous or sparsely hairy. Panicles (3.5) 5-12 (15) cm long, (0.5) 1-2 (3.5) cm wide, contracted, erect, greenish to purplish; branches (1.5) 2-3 (4) cm, sparsely scabrous, usually spikelet-bearing on the distal 1/2 - 2/3, sometimes to the base. Spikelets (2.5) 3-4 (4.5) mm; rachilla prolongations 0.2-1.3 (1.5) mm, sparsely bearded, hairs about 1.5 mm. Glumes keeled, usually scabrous on the keel tips, lateral-veins obscure, not raised, apices acute; callus hairs (0.3) 0.5-1 mm, 0.2-0.3 times as long as the lemmas, sparse; lemmas 2.5-3 (3.5) mm, (0) 0.5-1 mm shorter than the glumes; awns 1.5-2 (2.5) mm, attached to the lower 2/5 – 3/5 of the lemmas, sometimes slightly exserted, distinct from the callus hairs, bent; anthers 1.5-2 mm. 2n = 28.

Distribution

Maine, N.H., N.J., Mass., N.B., Nfld. and Labr., N.S., Ont., N.Y., Vt.

Discussion

Calamagrostis pickeringii grows in bogs, open white spruce scrub, wet meadows, coastal peatlands and lake shores, heaths, frost pockets (hollows), pitch pine barrens, and on sandy beaches, at 0-1600 m. It is found from Newfoundland and Nova Scotia south to the mountains of New Hampshire, New York, and New Jersey.

Selected References

None.

Lower Taxa

None.

"decumbent" is not a number.

... more about "Calamagrostis pickeringii"
membranous +  and scarious +
hairy +, glabrous +  and scabrous +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
Kendrick L. Marr +, Richard J. Hebda +  and Craig W. Greenef +
A. Gray +
1 (?) +  and 3 (?) +
2.5 cm25 mm <br />0.025 m <br /> (?) +
straight +
attached +
distinct +
exserted +  and lower +
indistinct +
2/5 +  and 3/5 +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
keeled +  and rounded +
pseudopetiolate +  and branching +
intravaginal +, extravaginal +, branching +  and basal +
swelling +
6 cm60 mm <br />0.06 m <br /> (17 cm170 mm <br />0.17 m <br />) +
not evident +
flat +  and involute +
3mm;4mm +
1.5 cm15 mm <br />0.015 m <br /> (?) +
appressed;more or less drooping +
spikelike +
0.2-0.3 times as long as the lemmas +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.1 cm1 mm <br />0.001 m <br />) +
Pickering's reed bentgrass +  and Calamagrostide de pickering +
in small clusters +  and solitary +
ascending +  and erect +
25 cm250 mm <br />0.25 m <br /> (55 cm550 mm <br />0.55 m <br />) +
not woody +
Maine +, N.H. +, N.J. +, Mass. +, N.B. +, Nfld. and Labr. +, N.S. +, Ont. +, N.Y. +  and Vt. +
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 +
1.5 cm15 mm <br />0.015 m <br /> (?) +
not raised +  and obscure +
lanceolate +  and ovate +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.1 cm1 mm <br />0.001 m <br />) +
lacerate +, truncate +  and obtuse +
0.2 cm2 mm <br />0.002 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
membranous +
inconspicuous +
lanceolate +
concealed +  and prominent +
1 +  and 3 +
2 +  and 1 +
hairy +  and glabrous +
2-keeled +
greenish +  and purplish +
5cm +  and 12cm +
spikelike +
1 cm10 mm <br />0.01 m <br /> (2 cm20 mm <br />0.02 m <br />) +
dry +  and fleshy +
1 +  and 60 +
compressed +
0.3 cm3 mm <br />0.003 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
1 (?) +  and 3 (?) +
simple +  and compound +
2 (?) +  and 3 (?) +
Calamagrostis pickeringii var. debilis +
Calamagrostis pickeringii +
Calamagrostis +
species +
membranous +
parallel +  and converging +
obscure +  and prominent +
plant +  and cespitose +
aquatic +  and terrestrial +