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Barbarea orthoceras Ledeb.
AMERICAN YELLOWROCKET
Life   Plantae   Dicotyledoneae   Brassicaceae   Barbarea


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FamilyScientific name @ source (records)
Andrenidae  Andrena angustitarsata @ UCRC_ENT (5)

Andrena cleodora @ UCRC_ENT (2)
Apidae  Bombus melanopygus @ UCRC_ENT (1)
Colletidae  Colletes larreae @ BBSL__STEP (1)
Megachilidae  Osmia densa @ UCRC_ENT (1)

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FNA Vol. 7 Page 460, 461, 462 , 463 Login | eFloras Home | Help
FNA | Family List | FNA Vol. 7 | Brassicaceae | Barbarea

3. Barbarea orthoceras Ledebour, Index Seminum (Dorpat). 2. 1824.

Barbarea americana Rydberg; B. orthoceras var. dolichocarpa Fernald; Campe orthoceras (Ledebour) A. Heller

Biennials or perennials; usually glabrous, except blade auricles often ciliate. Stems (1-)2-6 (-10) dm. Basal leaves: petiole (0.5-)1-7(-15) cm, (rarely ciliate basally); blade usually lyrate-pinnatifid, (1-)1.5-6(-11) cm, lobes (0, 1, or) 2-4 (or 5) on each side, lateral lobes oblong or ovate, 0.2-1 cm × 1-5 mm, not fleshy, margins entire, terminal lobe 1.5-5 cm × 10-25 mm. Cauline leaves: blade usually lyrate-pinnatifid (sometimes undivided and margins coarsely toothed or subentire), lateral lobes 1-4, (usually oblong or ovate, rarely lanceolate, to 2 × 1 cm), margins entire, (terminal lobe to 5 × 3 cm, margins usually entire or repand, rarely dentate); conspicuously auriculate, auricles ovate or narrowly oblong, (to 8 × 5 mm, margins entire). Fruiting pedicels erect or ascending, (2-)3-6(-7) mm, terete or subquadrangular, stout, (narrower than fruit). Flowers: sepals 2.5-3.5 × 1-1.5 mm, lateral pair slightly saccate basally, margins scarious, (subapically sparsely pubescent or glabrous); petals yellow or pale yellow, oblanceolate, 5-7(-8) × (1.5-)2-3 mm, base attenuate, apex rounded; filaments 3-4.5 mm; anthers 1 mm; ovules (24-)26-36 per ovary; gynophore to 0.5 mm. Fruits erect to erect-ascending, rarely appressed to rachis, torulose, terete to subquadrangular, (2.5-)3.1-4(-4.5) cm × 1.5-2 mm; style stout, 0.5-1.2(-2) mm. Seeds brown, somewhat plump, ovoid or oblong, 1.2-1.5 × 0.9-1 mm. 2 n = 16.

Flowering Mar-Jul. Open grassland, sandbars, scree, alpine meadows, ledges, rocky cliffs, forests, streamsides, railroad embankment, boggy ground, gravel pits, moist grassy slopes; 0-3400 m; Alta., B.C., Man., N.B., Nfld. and Labr., N.W.T., Ont., Que., Sask., Yukon; Alaska, Ariz., Calif., Colo., Idaho, Maine, Mich., Minn., Mont., Nev., N.H., N.Mex., Oreg., S.Dak., Utah, Wash., Wyo.; e, c Asia.

M. L. Fernald (1909) reported the southwestern Asian Barbarea plantaginea de Candolle from Alaska, but it is certain that his records were based on plants of B. orthoceras , which is rather rare in New England, where it appears to be restricted to portions of northern Maine and New Hampshire.

Updated: 2020-11-26 07:57:51 gmt
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