Chorispora tenella

(Pallas) de Candolle

Syst. Nat. 2: 435. 1821.

WeedyIntroducedIllustrated
Basionym: Raphanus tenellus Pallas Reise Russ. Reich. 3: 741. 1776
Synonyms: Chorispermum tenellum (Pallas) R. Brown
Treatment appears in FNA Volume 7. Treatment on page 511.

Plants papillose, sometimes pubescent, papillae sometimes mixed with simple trichomes. Stems (0.5–)1–4(–5.6) dm. Basal leaves (often withered by flowering); petiole (0.5–)1–2(–4) cm; blade oblanceolate or oblong, (1.5–)2.5–8(–13) cm × (4–)8–20(–30) mm, base cuneate or attenuate, apex acute, surfaces glandular. Cauline leaves similar to basal, distalmost subsessile, blades smaller distally. Fruiting pedicels (2–)3–5 mm, glandular. Flowers: sepals purplish, (3–)4–5(–6) × 0.5–0.7 mm; petals 8–10(–12) × 1–2 mm, claw 6–7 mm; filaments 4–6(–7) mm; anthers ca. 1.5 mm.Fruits slightly curved-ascending, (1.4–)1.8–2.5(–3) cm × 1.5–2 mm, with 8–12 constrictions on each side; style (6–)10–18(–22) mm. Seeds brown, 1–1.4 × 0.8–1 mm. 2n = 14.


Phenology: Flowering Apr–Jul.
Habitat: Waste places, pastures, fields, roadsides, railroad embankments, grassy slopes
Elevation: 0-2300 m

Distribution

V7 802-distribution-map.gif

Introduced; Alta., B.C., Sask., Ariz., Calif., Colo., Idaho, Ill., Ind., Iowa, Kans., La., Mass., Mich., Mo., Mont., Nebr., Nev., N.Mex., N.Y., N.Dak., Ohio, Okla., Oreg., S.Dak., Tenn., Tex., Utah, Wash., Wyo., Europe, Asia, n Africa, introduced also in South America.

Discussion

Chorispora tenella appears to be most widely distributed in Colorado, Nevada, and Wyoming, of all the provinces and states listed above.

Selected References

None.

Lower Taxa

None.
... more about "Chorispora tenella"
Ihsan A. Al-Shehbaz +
(Pallas) de Candolle +
Raphanus tenellus +
Alta. +, B.C. +, Sask. +, Ariz. +, Calif. +, Colo. +, Idaho +, Ill. +, Ind. +, Iowa +, Kans. +, La. +, Mass. +, Mich. +, Mo. +, Mont. +, Nebr. +, Nev. +, N.Mex. +, N.Y. +, N.Dak. +, Ohio +, Okla. +, Oreg. +, S.Dak. +, Tenn. +, Tex. +, Utah +, Wash. +, Wyo. +, Europe +, Asia +, n Africa +  and introduced also in South America. +
0-2300 m +
Waste places, pastures, fields, roadsides, railroad embankments, grassy slopes +
Flowering Apr–Jul. +
Weedy +, Introduced +  and Illustrated +
Chorispermum tenellum +
Chorispora tenella +
Chorispora +
species +