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Descurainia incisa (Engelm. ex A. Gray) Britton  
Family: Brassicaceae
mountain tansy mustard, more...mountain tansymustard
[Descurainia incana subsp. incisa (Engelm.) Kartesz & Gandhi, moreDescurainia richardsonii subsp. incisa (Engelm.) Detling, Descurainia richardsonii var. sonnei (B.L. Robins.) C.L. Hitchc., Sisymbrium incisum Engelm., Sophia incisa (Engelm.) Greene]
Descurainia incisa image
  • FNA
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Cruciferae Jussieu, Ihsan A. Al-Shehbaz in Flora of North America (vol. 7)
Annuals; glandular or eglan-dular; densely to sparsely pubescent, glabrous or pubes-cent distally, sometimes canescent, trichomes dendritic. Stems erect, usually unbranched basally, branched distally or sometimes throughout, (1.3-)2-8.2(-10.7) dm. Basal leaves: petiole 0.5-4.7 cm; blade pinnate, obovate to oblanceolate in outline, 1.5-10.3 cm, lateral lobes (2-9 pairs), ovate or oblong to lanceolate or linear, margins usually dentate to incised or entire, rarely pinnatifid or crenate. Cauline leaves sessile or shortly petiolate; blade smaller distally, distal lobes oblong, lanceolate, linear, (margins dentate to denticulate or entire), surfaces pubescent or glabrous. Racemes considerably elongated in fruit, (glandular or eglandular). Fruiting pedicels ascending to divaricate or horizontal, straight, (3-)5-25(-30) mm. Flowers: sepals erect to ascending, yellowish, oblong to ovate, 1.6-2.4 mm, glabrous or pubescent; petals narrowly oblanceolate, 1.7-2.8 × 0.5-0.9 mm; median filaments 1.6-2.4 mm; anthers 0.3-0.4 mm. Fruits erect to ascending, linear, slightly torulose, 8-20 × 0.9-1.3 mm, (straight or slightly to strongly curved inward); valves each not veined or with distinct midvein; septum not veined; ovules 14-26 per ovary; style 0.1-0.3 mm, glabrous. Seeds uniseriate, reddish brown, oblong, 0.9-1.3 × 0.5-0.6 mm.
Descurainia incisa
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Kirstin Phillips
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Kirstin Phillips
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Kirstin Phillips
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Kirstin Phillips
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The National Science Foundation
Development supported by National Science Foundation Grants (DBI 9983132, BRC 0237418, DBI 0743827, DBI 0847966)
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