Calamagrostis porteri subsp. insperata

(Swallen) C.W. Greene
Common names: Bartley's reedgrass
Synonyms: Calamagrostis insperata
Treatment appears in FNA Volume 24. Treatment on page 723.

Culms (85) 90-120 cm. Sheaths smooth; collars glabrous; ligules (2) 3-4 (6) mm; blades (12) 16-28 (30) cm long, (2) 6-8 (12) mm wide, glaucous on both surfaces. Panicles (11) 14-18 (22) cm long, (1.5) 2-3 (3.5) cm wide; branches (2.5) 5-7 (7.5) cm. Spikelets (4) 5 (6) mm; rachilla prolongations with 1.5-2 (3) mm hairs. Callus hairs 2 (3) mm, 0.5-0.7 times as long as the lemmas; lemmas 3 (4) mm, 1 (2) mm shorter than the glumes; awns 3-3.5 mm, attached to the lower 1/10 – 3/10 of the lemmas; anthers 2-2.5 mm. 2n = 56.

Discussion

Isolated populations of Calamagrostis porteri subsp. insperata grow from southern Missouri and Arkansas to Ohio and Kentucky. It is listed as possibly extirpated or of conservation concern in several states.

Selected References

None.

Lower Taxa

None.

"decumbent" is not a number.

membranous +  and scarious +
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 +
(Swallen) C.W. Greene +
1 (?) +  and 3 (?) +
4.5 cm45 mm <br />0.045 m <br /> (?) +
straight +
attached +
distinguished +
1/10 +  and 3/10 +
0.3 cm3 mm <br />0.003 m <br /> (0.35 cm3.5 mm <br />0.0035 m <br />) +
keeled +  and rounded +
pseudopetiolate +  and branching +
intravaginal +, extravaginal +, branching +  and basal +
swelling +
16 cm160 mm <br />0.16 m <br /> (28 cm280 mm <br />0.28 m <br />) +
not evident +
flat +  and involute +
6mm;8mm +
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 +
2 cm20 mm <br />0.02 m <br /> (?) +
Bartley's reedgrass +
ascending +  and erect +
90 cm900 mm <br />0.9 m <br /> (120 cm1,200 mm <br />1.2 m <br />) +
not woody +
Md. +, W.Va. +, Pa. +, Ohio +, Mo. +, N.C. +, Tenn. +, Va. +, N.Y. +, Ark. +, Ill. +, Ga. +, Ind. +  and Ky. +
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 +
3 cm30 mm <br />0.03 m <br /> (?) +
sparse +  and abundant +
uncinate +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
not raised +, obscure +  and slightly prominent +
lanceolate +  and ovate +
1 cm10 mm <br />0.01 m <br /> (3 cm30 mm <br />0.03 m <br />) +
truncate +  and obtuse entire or lacerate +
0.3 cm3 mm <br />0.003 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
membranous +
inconspicuous +
lanceolate +
concealed +  and prominent +
2 +  and 4 +
2 +  and 1 +
hairy +  and glabrous +
2-keeled +
green +  and pale-purple +
14cm +  and 18cm +
erect +  and nodding +
spikelike +
2 cm20 mm <br />0.02 m <br /> (3 cm30 mm <br />0.03 m <br />) +
dry +  and fleshy +
1 +  and 60 +
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 (?) +
Calamagrostis insperata +
Calamagrostis porteri subsp. insperata +
Calamagrostis porteri +
subspecies +
membranous +
parallel +  and converging +
obscure +  and prominent +
plant +  and cespitose +
aquatic +  and terrestrial +
0.5mm +  and 1mm +