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hare's ear, hare's-ear mustard

hare's-ear-mustard, hedge cabbage, rabbit's-ear, rabbit-ears, slinkweed, treacle mustard

Habit Plants not scapose; (usually glaucous). Plants sometimes winter annuals.
Stems

erect, unbranched or branched proximally.

mostly simple, (1–)3–7 dm.

Leaves

basal and cauline;

subsessile or sessile;

basal not rosulate, subsessile, blade margins usually entire;

cauline blade (base cordate-amplexicaul or, rarely, auriculate), margins usually entire, rarely crenulate.

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.

Racemes

(corymbose, several-flowered).

Flowers

sepals oblong;

petals usually narrowly obovate, rarely oblanceolate, claw differentiated from blade [undifferentiated], (apex obtuse);

stamens slightly tetradynamous;

filaments not dilated, slender;

anthers oblong (base slightly sagittate);

nectar glands lateral, median glands often absent.

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.

Fruiting pedicels

ascending, stout (almost as thick as fruit, or, rarely, much narrower).

ascending, straight or curved-ascending, (8–)10–15(–20) mm.

Fruits

sessile, linear, torulose, 4-angled or terete;

valves each with prominent midvein;

replum rounded;

septum complete;

stigmas capitate-flattened, entire.

± torulose, strongly 4-angled to ± cylindrical, 1-nerved, keeled, (5–)8–14 cm × 2–2.5 mm;

style cylindrical, 0.5–4 mm.

Seeds

not winged, oblong [ellipsoid];

seed coat (papillose), copiously mucilaginous (granular) when wetted;

cotyledons incumbent.

brown, 2–2.9 × 1.2–1.5 mm.2n = 14.

x

= 7 [9].

Conringia

Conringia orientalis

Phenology Flowering (Mar in Texas) May–Aug.
Habitat Cultivated lands, grain fields, disturbed areas, waste places, roadsides, gardens
Elevation 0-3500 m (0-11500 ft)
Distribution
from USDA
c Europe; e Mediterranean region; Asia (Afghanistan, Pakistan) [Introduced in North America; introduced also in Mexico, nw Africa, Australia]
[BONAP county map]
from FNA
AK; AL; AR; AZ; CA; CO; CT; DC; DE; FL; GA; IA; ID; IL; IN; KS; KY; LA; MA; MD; ME; MI; MN; MO; MS; MT; NC; ND; NE; NH; NJ; NM; NV; NY; OH; OK; OR; PA; RI; SC; SD; TN; TX; UT; VA; VT; WA; WI; WV; WY; AB; BC; MB; NB; NL; NS; ON; PE; QC; SK; Europe; Asia [Introduced in North America; introduced also in Mexico, nw Africa, Australia]
[WildflowerSearch map]
[BONAP county map]
Discussion

Species 6 (1 in the flora).

(Discussion copyrighted by Flora of North America; reprinted with permission.)

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.

(Discussion copyrighted by Flora of North America; reprinted with permission.)

Source FNA vol. 7, p. 517. Author: Suzanne I. Warwick. FNA vol. 7, p. 517.
Parent taxa Brassicaceae > tribe Conringieae Brassicaceae > tribe Conringieae > Conringia
Subordinate taxa
C. orientalis
Synonyms Brassica orientalis, Erysimum orientale
Name authority Heister ex Fabricius: Enum., 160. (1759) (Linnaeus) Dumortier: Fl. Belg., 123. (1827)
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