Bromus catharticus

Vahl
Common names: Rescue grass
Introduced
Synonyms: Ceratochloa unioloides Bromus willdenowii Bromus unioloides
Treatment appears in FNA Volume 24. Treatment on page 199.

Plants annual, biennial, or perennial; loosely cespitose or tufted. Culms 30-120 cm tall, 2-4 mm thick, erect or decumbent. Sheaths usually densely, often retrorsely, hairy, hairs sometimes confined to the throat; auricles absent; ligules 1-4 mm, glabrous or pilose, obtuse, lacerate to erose; blades 4-30 cm long, 3-10 mm wide, flat, glabrous or hairy on both surfaces. Panicles 9-28 cm, usually open, erect or nodding; lower branches shorter than 10 cm, 1-4 per node, spreading or ascending, with up to 5 spikelets variously distributed. Spikelets (17) 20-40 mm, shorter than at least some pedicels and branches, elliptic to lanceolate, strongly laterally compressed, not crowded or overlapping, with 4-12 florets. Glumes smooth or scabrous, glabrous or pubescent; lower glumes 7-12 mm, 5-7 (9) -veined; upper glumes 9-17 mm, 7-9 (11) -veined, shorter than the lowest lemma; lemmas 11-20 mm, lanceolate, laterally compressed, strongly keeled, usually glabrous, sometimes pubescent distally, smooth or scabrous, 9-13-veined, veins often raised and riblike, margins sometimes conspicuous, hyaline, whitish or partly purplish, apices entire or toothed, teeth acute, shorter than 1 mm; awns absent or to 10 mm; anthers 0.5-1 mm in cleistogamous florets, 2-5 mm in chasmogamous florets. 2n = 42.

Distribution

D.C., Kans., N.Dak., Okla., Pacific Islands (Hawaii), Fla., N.J., N.Mex., Tex., La., Nebr., Tenn., N.C., S.C., Pa., N.Y., Nev., Va., Alta., Nfld. and Labr. (Nfld.), Ont., Colo., Calif., Ala., Ark., Ill., Ga., Iowa, Ariz., Md., Ohio, Utah, Mo., Miss., Ky., Oreg., S.Dak.

Discussion

Selected References

None.

Key

1 Awns absent or to 3.5 mm long Bromus catharticus var. catharticus
1 Awns (5)6-10 mm long Bromus catharticus var. elatus

"decumbent" is not a number.

... more about "Bromus catharticus"
membranous +  and scarious +
0.2 cm2 mm <br />0.002 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
with acute teeth +  and entire +
Toothed (?) +  and Entire (?) +
Leon E. Pavlickf +
divaricate +
1 (?) +  and 3 (?) +
straight +
distinct +
subterminal +  and terminal +
geniculate +
keeled +  and rounded +
pseudopetiolate +  and branching +
intravaginal +, extravaginal +, branching +  and basal +
swelling +
4 cm40 mm <br />0.04 m <br /> (30 cm300 mm <br />0.3 m <br />) +
not evident +
hairy +  and glabrous +
cross +, linear +  and narrowly lanceolate +
3mm;10mm +
drooping;reflexed;usually ascending;spreading +
spikelike +
Rescue grass +
not branching +
30 cm300 mm <br />0.3 m <br /> (120 cm1,200 mm <br />1.2 m <br />) +
decumbent +  and erect +
5 cm50 mm <br />0.05 m <br /> (190 cm1,900 mm <br />1.9 m <br />) +
not woody +
0.2 cm2 mm <br />0.002 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
D.C. +, Kans. +, N.Dak. +, Okla. +, Pacific Islands (Hawaii) +, Fla. +, N.J. +, N.Mex. +, Tex. +, La. +, Nebr. +, Tenn. +, N.C. +, S.C. +, Pa. +, N.Y. +, Nev. +, Va. +, Alta. +, Nfld. and Labr. (Nfld.) +, Ont. +, Colo. +, Calif. +, Ala. +, Ark. +, Ill. +, Ga. +, Iowa +, Ariz. +, Md. +, Ohio +, Utah +, Mo. +, Miss. +, Ky. +, Oreg. +  and S.Dak. +
liquid +, soft +  and hard +
capillary +
pistillate +  and staminate +
sometimes longer +
4 +  and 12 +
chasmogamous +  and cleistogamous +
terete +  and laterally compressed +
1-9(11)-veined +
always shorter +  and usually shorter +
lanceolate +
subtending +
pubescent +, glabrous +, scabrous +  and smooth +
mucronate +  and acute +
unequal +
uncinate +
solid +  and hollow +
pubescent +  and glabrous +
keeled +, compressed +  and lanceolate +
1.1 cm11 mm <br />0.011 m <br /> (2 cm20 mm <br />0.02 m <br />) +
herbaceous +  and coriaceous +
pilose +  and glabrous +
lacerate +  and obtuse +
0.1 cm1 mm <br />0.001 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
membranous +
inconspicuous +
lanceolate +
fleshy +  and membranous +
ascending +  and spreading +
10 cm100 mm <br />0.1 m <br /> (?) +
0.7 cm7 mm <br />0.007 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
purplish +, whitish +  and hyaline +
conspicuous +
concealed +  and prominent +
2 +  and 1 +
hairy +  and glabrous +
well-developed +
reduced +
nodding +  and erect +
9 cm90 mm <br />0.09 m <br /> (28 cm280 mm <br />0.28 m <br />) +
dry +  and fleshy +
Introduced +
overlapping +, not crowded +  and distributed +
not viviparous +
compressed +, elliptic +  and lanceolate +
2 cm20 mm <br />0.02 m <br /> (4 cm40 mm <br />0.04 m <br />) +
1 (?) +  and 3 (?) +
simple +  and compound +
2 (?) +  and 3 (?) +
Ceratochloa unioloides +, Bromus willdenowii +  and Bromus unioloides +
Bromus catharticus +
Bromus sect. Ceratochloa +
species +
membranous +
1 cm10 mm <br />0.01 m <br /> (?) +
0.9 cm9 mm <br />0.009 m <br /> (1.7 cm17 mm <br />0.017 m <br />) +
perennial +, biennial +  and annual +
plant +  and cespitose +
aquatic +  and terrestrial +