Brachyelytrum erectum

(Schreb.) P. Beauv.
Common names: Southern shorthusk Brachyelytrum dresse
Endemic
Synonyms: Brachyelytrum aristosum var. glabratum
Treatment appears in FNA Volume 24. Treatment on page 60.

Culms 34-102 cm long, 0.7-1.4 mm thick, erect; nodes densely pilose; lowest internodes mostly glabrous, usually retrorsely pub¬escent near the nodes. Sheaths hispid; ligules of middle and upper cauline blades 2-3.5 mm, truncate to acute, lacerate or erose; blades 8.8-17.5 cm long, (9) 11-17 (20) mm wide, abaxial surfaces pilose on the veins and often between the veins, adaxial surfaces glabrous or slightly hispid, margins scabrous, with (2) 5-11 (14) prickles and 0-2 (14) macrohairs per mm. Panicles (5.5) 9.1-14.3 (18.5) cm. Spikelets, including the awns, (25) 29-36 (42) mm. Lower glumes (0.1) 0.3-0.7 (1.1) mm, sometimes absent; upper glumes (0.2) 0.9-3.5 (7) mm, sometimes aristate; calluses hairy, hairs 0.2-0.5 mm; lemmas 9-13 mm long, 0.8-1.7 mm wide, veins hispid, hairs 0.2-0.9 mm, midveins more prominent than the lateral-veins; awns 13-17 (20) mm; paleas 7-12 mm; anthers 3.5-6 mm. Caryopses 5.5-7.5 mm. 2n = 22.

Distribution

Conn., N.J., N.Y., W.Va., Del., D.C., Wis., Iowa, Fla., Puerto Rico, Mass., R.I., Tex., La., Kans., Nebr., Tenn., N.C., S.C., Pa., Va., Ala., Ark., Ill., Ga., Ind., N.B., Nfld. and Labr. (Labr.), N.S., Ont., Que., Okla., Md., Ohio, Mo., Minn., Mich., Miss., Ky.

Discussion

Brachyelytrum erectum grows in woodlands, occasionally over limestone bedrock, and in moist woods and forests. It extends from Lake of the Woods, Ontario, east to Newfoundland, and in the United States from Minnesota to New England and south to the Gulf Coast and Florida.

Koyama and Kawano (1964), among others, treated Brachyelytrum erectum var. glabratum (Vasey) T. Koyama & Kawano as the northern taxon B. aristosum, but the holotype of B. erectum var. glabratum belongs to B. erectum sensu stricto. This means that, nomenclaturally, B. erectum var. glabratum is a synonym of B. erectum, although most of the specimens identified as var. glabratum belong to B. aristosum.

Selected References

None.

Lower Taxa

None.
... more about "Brachyelytrum erectum"
membranous +  and scarious +
hispid +  and glabrous +
0.35 cm3.5 mm <br />0.0035 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
Stephen N. Stephenson +  and Jeffery M. Saarela +
(Schreb.) P. Beauv. +
1 (?) +  and 3 (?) +
20 cm200 mm <br />0.2 m <br /> (?) +
straight +
basal +  and apical +
1.3 cm13 mm <br />0.013 m <br /> (1.7 cm17 mm <br />0.017 m <br />) +
keeled +  and rounded +
pseudopetiolate +  and branching +
intravaginal +, extravaginal +, branching +  and basal +
swelling +
8.8 cm88 mm <br />0.088 m <br /> (17.5 cm175 mm <br />0.175 m <br />) +
not evident +
cross +  and tapering +
11mm;17mm +
spikelike +
0.8 cm8 mm <br />0.008 m <br /> (?) +
Southern shorthusk +  and Brachyelytrum dresse +
not branched +
34 cm340 mm <br />0.34 m <br /> (102 cm1,020 mm <br />1.02 m <br />) +
28 cm280 mm <br />0.28 m <br /> (102 cm1,020 mm <br />1.02 m <br />) +
woody +  and herbaceous +
0.07 cm0.7 mm <br />7.0e-4 m <br /> (0.14 cm1.4 mm <br />0.0014 m <br />) +
Conn. +, N.J. +, N.Y. +, W.Va. +, Del. +, D.C. +, Wis. +, Iowa +, Fla. +, Puerto Rico +, Mass. +, R.I. +, Tex. +, La. +, Kans. +, Nebr. +, Tenn. +, N.C. +, S.C. +, Pa. +, Va. +, Ala. +, Ark. +, Ill. +, Ga. +, Ind. +, N.B. +, Nfld. and Labr. (Labr.) +, N.S. +, Ont. +, Que. +, Okla. +, Md. +, Ohio +, Mo. +, Minn. +, Mich. +, Miss. +  and Ky. +
0 +  and 1/2 +
liquid +, soft +  and hard +
capillary +
pistillate +  and staminate +
sometimes longer +
compressed +
8mm +  and 12mm +
subtending +
2 +  and 1 +
lanceolate +
unequal +
uncinate +
0.02 cm0.2 mm <br />2.0e-4 m <br /> (0.09 cm0.9 mm <br />9.0e-4 m <br />) +
0.9 cm9 mm <br />0.009 m <br /> (1.3 cm13 mm <br />0.013 m <br />) +
tapering +
membranous +  and coriaceous +
0.8mm +  and 1.7mm +
membranous +
inconspicuous +
lanceolate +
fleshy +  and membranous +
0.03 cm0.3 mm <br />3.0e-4 m <br /> (0.07 cm0.7 mm <br />7.0e-4 m <br />) +
more prominent +
concealed +  and prominent +
2 +  and 1 +
well-developed +
subequal +
0.7 cm7 mm <br />0.007 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
5.5 cm55 mm <br />0.055 m <br /> (?) +
9.1 cm91 mm <br />0.091 m <br /> (14.3 cm143 mm <br />0.143 m <br />) +
dry +  and fleshy +
unisexual +  and bisexual +
terete +  and dorsally compressed +
2.9 cm29 mm <br />0.029 m <br /> (3.6 cm36 mm <br />0.036 m <br />) +
1 (?) +  and 3 (?) +
simple +  and compound +
2 (?) +  and 3 (?) +
persistent +
elongate +
Brachyelytrum aristosum var. glabratum +
Brachyelytrum erectum +
Brachyelytrum +
species +
membranous +
0.09 cm0.9 mm <br />9.0e-4 m <br /> (0.35 cm3.5 mm <br />0.0035 m <br />) +
aquatic +  and terrestrial +