Diarrhena obovata

(Gleason) Brandenburg
Common names: Obovate beakgrain
Treatment appears in FNA Volume 24. Treatment on page 65.

Culms 48-131 cm, glabrous. Sheaths, collars, and auricles glabrous or pubescent; ligules 0.2-1 mm; blades 24-72 cm long, 6-18 mm wide, abaxial surfaces glabrous or scabridulous, adaxial surfaces similar or pubescent, margins usually scabridulous, rarely smooth. Panicles 5-30 cm, with 4-33 spikelets. Spikelets 7-17 mm, oblong to ovate, with (2) 3-5 (7) florets. Glumes green to stramineous; lower glumes 1.7-3.7 mm long, 0.3-0.6 mm wide in profile, 1-3-veined; upper glumes 2.2-5.2 mm long, 0.75-1.5 mm wide in profile, (3) 5-veined; calluses glabrous; lemmas 3.7-7.5 mm, widest near or above the middle, obovate or elliptic in profile, abruptly tapering, apices sharply cuspidate; paleas glabrous, keeled, apices usually bifid, rarely truncate, sinuses 0.05-0.3 (0.5) mm deep; anthers 1.4-2 mm. Caryopses 4.1-6 mm long, 1.8-2.5 mm wide, broadly elliptic to obovate in outline, narrowing abruptly to a bottlenose-shaped beak, usually smooth, occasionally wrinkled, shiny, usually straw-colored, with occasional brown areas basally. 2n = 60.

Distribution

Kans., Nebr., Okla., W.Va., Pa., Tex., Md., Ind., S.Dak., Minn., Ky., Mich., Ohio, Wis., Tenn., N.Y., Va., Ark., Ill., Ont., Iowa, Mo.

Discussion

Diarrhena obovata is restricted to the Flora region, growing in rich woodlands from South Dakota to Ontario and New York and south to Texas, Tennessee, and Virginia. It is most common in the prairie states.

Selected References

None.

Lower Taxa

None.

"decumbent" is not a number.

... more about "Diarrhena obovata"
membranous +  and scarious +
0.14 cm1.4 mm <br />0.0014 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
truncate +  and bifid +
David M. Brandenburg +
(Gleason) Brandenburg +
1 (?) +  and 3 (?) +
basal +  and apical +
keeled +  and rounded +
pseudopetiolate +  and branching +
intravaginal +, extravaginal +, branching +  and basal +
swelling +
conspicuous +
bottlenose--shaped +
24 cm240 mm <br />0.24 m <br /> (72 cm720 mm <br />0.72 m <br />) +
long-tapering +  and tapering +
0.6 cm6 mm <br />0.006 m <br /> (1.8 cm18 mm <br />0.018 m <br />) +
appressed;ascending +
spikelike +
unicellular +
yellowish +  and light green +
Obovate beakgrain +
48 cm480 mm <br />0.48 m <br /> (131 cm1,310 mm <br />1.31 m <br />) +
slender +
48 cm480 mm <br />0.48 m <br /> (131 cm1,310 mm <br />1.31 m <br />) +
woody +  and herbaceous +
0.1 cm1 mm <br />0.001 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
Kans. +, Nebr. +, Okla. +, W.Va. +, Pa. +, Tex. +, Md. +, Ind. +, S.Dak. +, Minn. +, Ky. +, Mich. +, Ohio +, Wis. +, Tenn. +, N.Y. +, Va. +, Ark. +, Ill. +, Ont. +, Iowa +  and Mo. +
1/4 +  and 1/3 +
liquid +, soft +  and hard +
capillary +
pistillate +  and staminate +
sometimes longer +
rudimentary +
3 +  and 5 +
compressed +
reduced +
green +  and stramineous +
subtending +
scabridulous +
keeled +  and lanceolate +
unequal +
uncinate +
0.5 cm5 mm <br />0.005 m <br /> (?) +
solid +  and hollow +
lanceolate +
0.37 cm3.7 mm <br />0.0037 m <br /> (0.75 cm7.5 mm <br />0.0075 m <br />) +
cartilaginous +  and thinly coriaceous +
0.02 cm0.2 mm <br />2.0e-4 m <br /> (0.1 cm1 mm <br />0.001 m <br />) +
membranous +
inconspicuous +
lanceolate +  and elliptic +
1.5 cm15 mm <br />0.015 m <br /> (?) +
0.17 cm1.7 mm <br />0.0017 m <br /> (0.37 cm3.7 mm <br />0.0037 m <br />) +
0.3mm +  and 0.6mm +
scabridulous +
concealed +  and prominent +
2 +  and 1 +
hairy +  and glabrous +
well-developed +
subequal +
5 cm50 mm <br />0.05 m <br /> (30 cm300 mm <br />0.3 m <br />) +
dry +  and fleshy +
not prolonged +
4 +  and 33 +
oblong +  and ovate +
0.7 cm7 mm <br />0.007 m <br /> (1.7 cm17 mm <br />0.017 m <br />) +
1 +  and 3 +
simple +  and compound +
2 (?) +  and 3 (?) +
not persistent +
Gramineae +
Diarrhena obovata +
Diarrhena +
species +
membranous +
0.22 cm2.2 mm <br />0.0022 m <br /> (0.52 cm5.2 mm <br />0.0052 m <br />) +
0.75mm +  and 1.5mm +
aquatic +  and terrestrial +