Descurainia pinnata subsp. pinnata

Synonyms: Cardamine multifida Pursh Descurainia canescens (Nuttall) Prantl Descurainia multifida (Pursh) O. E. Schulz Descurainia multifoliata Cory Sisymbrium canescens Nuttall Sisymbrium canescens var. californicum Torrey & A. Gray Sisymbrium incisum var. californicum (Torrey & A. Gray) Blankinship Sisymbrium multifidum (Torrey & A. Gray) Rydberg Sisymbrium multifidum subsp. canescens Sophia californica Rydberg Sophia millefolia Sophia myriophylla
Treatment appears in FNA Volume 7. Treatment on page 527.

Plants usually glandular, rarely eglandular, usually not canescent. Stems unbranched basally, branched distally. Racemes: rachis sparsely to densely pubescent, often glandular. Fruiting pedicels divaricate to horizontal or descending, forming (60–)70–90(–110)º angle, 4–14(–17) mm. Flowers: sepals rose (at least apically), 0.8–2 mm; petals 1–1.8 × 0.3–0.7 mm. 2n = 14, 28.


Phenology: Flowering Feb–Apr.
Habitat: Roadsides, waste grounds, disturbed sites, railroad tracks and embankments, grassy areas, sandy knolls, stream banks, abandoned fields
Elevation: 0-600 m

Distribution

V7 831-distribution-map.gif

Ala., Fla., Ga., La., Miss., N.C., S.C., Tex.

Discussion

R. C. Rollins (1993) indicated that subsp. pinnata grows in Oklahoma and Virginia. We have not seen material of it from those states, and it is likely that those records are based on plants of subsp. brachycarpa.

Selected References

None.

Lower Taxa

None.
Barbara E. Goodson +  and Ihsan A. Al-Shehbaz +
(Walter) Britton +
Erysimum pinnatum +
Ala. +, Fla. +, Ga. +, La. +, Miss. +, N.C. +, S.C. +  and Tex. +
0-600 m +
Roadsides, waste grounds, disturbed sites, railroad tracks and embankments, grassy areas, sandy knolls, stream banks, abandoned fields +
Flowering Feb–Apr. +
Mem. Torrey Bot. Club +
Cardamine multifida +, Descurainia canescens +, Descurainia multifida +, Descurainia multifoliata +, Sisymbrium canescens +, Sisymbrium canescens var. californicum +, Sisymbrium incisum var. californicum +, Sisymbrium multifidum +, Sisymbrium multifidum subsp. canescens +, Sophia californica +, Sophia millefolia +  and Sophia myriophylla +
Descurainia pinnata subsp. pinnata +
Descurainia pinnata +
subspecies +