Conringia orientalis

(Linnaeus) Dumortier
Fl. Belg., 123. 1827.
Common names: Rabbit’s-ear rabbit-ears treacle mustard slinkweed
WeedyIntroducedIllustrated
Basionym: Brassica orientalis Linnaeus Sp. Pl. 2: 666. 1753 Erysimum orientale (Linnaeus) Crantz 1769
Treatment appears in FNA Volume 7. Treatment on page 517.

Plants sometimes winter annuals. Stems mostly simple, (1–)3–7 dm. Basal leaves: blade (slightly fleshy), pale green, oblanceolate to obovate, 5–9 cm, margins ± entire. Cauline leaves: blade oblong to elliptic or lanceolate, (1–)3–10(–15) cm × (5–)20–25(–50) mm, base deeply cordate-amplexicaul, apex rounded. Fruiting pedicels ascending, straight or curved-ascending, (8–)10–15(–20) mm. Flowers: sepals 6–8 × 1–1.5 mm, median pair narrower than lateral, apex acute; petals 7–12 × 2–3 mm, base attenuate, claw usually as long as sepal; filaments 5–7 mm; anthers 1.5–2 mm. Fruits ± torulose, strongly 4-angled to ± cylindrical, 1-nerved, keeled, (5–)8–14 cm × 2–2.5 mm; style cylindrical, 0.5–4 mm. Seeds brown, 2–2.9 × 1.2–1.5 mm.2n = 14.


Phenology: Flowering (Mar in Texas) May–Aug.
Habitat: Cultivated lands, grain fields, disturbed areas, waste places, roadsides, gardens
Elevation: 0-3500 m

Distribution

V7 815-distribution-map.gif

Introduced; Alta., B.C., Man., N.B., Nfld. and Labr., N.S., Ont., P.E.I., Que., Sask., Ala., Alaska, Ariz., Ark., Calif., Colo., Conn., Del., D.C., Fla., Ga., Idaho, Ill., Ind., Iowa, Kans., Ky., La., Maine, Md., Mass., Mich., Minn., Miss., Mo., Mont., Nebr., Nev., N.H., N.J., N.Mex., N.Y., N.C., N.Dak., Ohio, Okla., Oreg., Pa., R.I., S.C., S.Dak., Tenn., Tex., Utah, Vt., Va., Wash., W.Va., Wis., Wyo., Europe, Asia, introduced also in Mexico, nw Africa, Australia.

Discussion

Conringia orientalis was collected on ballast in New York as early as 1879. It is most abundant in the plains and prairies of both the United States and Canada (I. A. Al-Shehbaz 1985; R. C. Rollins and Al-Shehbaz 1986). In disturbed places, it has penetrated into the native vegetation over a wide area.

Selected References

None.

Lower Taxa

None.

... more about "Conringia orientalis"
Suzanne I. Warwick +
(Linnaeus) Dumortier +
Brassica orientalis +  and Erysimum orientale +
Rabbit’s-ear +, rabbit-ears +, treacle mustard +  and slinkweed +
Alta. +, B.C. +, Man. +, N.B. +, Nfld. and Labr. +, N.S. +, Ont. +, P.E.I. +, Que. +, Sask. +, Ala. +, Alaska +, Ariz. +, Ark. +, Calif. +, Colo. +, Conn. +, Del. +, D.C. +, Fla. +, Ga. +, Idaho +, Ill. +, Ind. +, Iowa +, Kans. +, Ky. +, La. +, Maine +, Md. +, Mass. +, Mich. +, Minn. +, Miss. +, Mo. +, Mont. +, Nebr. +, Nev. +, N.H. +, N.J. +, N.Mex. +, N.Y. +, N.C. +, N.Dak. +, Ohio +, Okla. +, Oreg. +, Pa. +, R.I. +, S.C. +, S.Dak. +, Tenn. +, Tex. +, Utah +, Vt. +, Va. +, Wash. +, W.Va. +, Wis. +, Wyo. +, Europe +, Asia +, introduced also in Mexico +, nw Africa +  and Australia. +
0-3500 m +
Cultivated lands, grain fields, disturbed areas, waste places, roadsides, gardens +
Flowering (Mar in Texas) May–Aug. +
Weedy +, Introduced +  and Illustrated +
Cruciferae +
Conringia orientalis +
Conringia +
species +