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|Jepson eFlora: Taxon page
Key to families | Table of families and genera
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|Family: Brassicaceae (Cruciferae)||View Description||Dichotomous Key|
|Genus: Descurainia||View Description||Dichotomous Key|
|Species:||View Description||Dichotomous Key|
Descurainia pinnata (Walter) Britton
Habit: Annual, sparsely to densely hairy, +- green or canescent, glandular or not (glabrous distally). Stem: (0.8)1.3--5.7(9.2) dm, simple or branched distally, proximally, or throughout. Leaf: basal, proximal cauline 1--15 cm, 1- or 2-pinnately lobed, oblanceolate or oblong to ovate in outline; lateral lobes 4--9 pairs, dentate to pinnately lobed; ultimate lobes oblanceolate to ovate, entire or dentate; distal cauline sessile or short-petioled, lobes generally narrower. Flower: petals, bright yellow to cream. Fruit: 4--13(17) mm, 1.2--2.2 mm wide, club-shaped (broadly linear, widest distally); valves with prominent midvein, glabrous; style to 0.2 mm, generally +- absent; pedicel ascending to spreading or +- descending, 4--23 mm, straight or curved. Seed: 16--40, 0.6--0.9 mm, in 2 rows per chamber, oblong.
Note: Descurainia pinnata subsp. halictorum (Cockerell) Detling, Descurainia pinnata subsp. intermedia (Rydb.) Detling, Descurainia pinnata subsp. menziesii (DC.) Detling represent a heterogeneous mixture of intermediates within Descurainia pinnata and its hybrids with other species.
eFlora Treatment Author: Ihsan A. Al-Shehbaz
Jepson Online Interchange
Previous taxon: Descurainia paradisa
Next taxon: Descurainia pinnata subsp. brachycarpa
Citation for this treatment: Ihsan A. Al-Shehbaz 2016. Descurainia pinnata, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/cgi-bin/get_IJM.pl?tid=22613, accessed on December 10, 2016.
Citation for the whole project: Jepson Flora Project (eds.) 2016. Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html, accessed on December 10, 2016.