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Draba
See list of 5 species in this genusMicromorphological details of pubescence requiring 20 × or greater magnification are important for confident determinations of some species. Reference: Mulligan (1976).
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1a. Petals bilobed with a deep, apical sinus; stems scapose (i.e., all the leaves confined to a basal cluster)
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1b. Petals entire or emarginate at apex; stems with at least 1 leaf-bearing node
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2a. Plants annual; rachis of infructescence congested, 1–16 (–35) mm long; stem leaves all borne at base just above the basal rosette of leaves
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2b. Plants perennial from a caudex; rachis of infructescence relatively elongate, (16–) 20–78 mm long; stem leaves more evenly distributed, usually some produced in the apical half of the stem
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3a. Lowest 1–3 flowers each subtended by a leafy bract; siliques pubescent with stellate hairs
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3b. None of the flowers subtended by leafy bracts; siliques glabrous or sparsely pubescent with simple or forked hairs
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4a. Stellate hairs of abaxial surface of basal leaves borne on short stalks, the radiating branches of the hairs elevated above the surface of the leaf blade [Fig. 518]; styles up to 0.3 (–0.4) mm long; stigmas often bilobed
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4b. Stellate hairs of abaxial surface of basal leaves sessile, the radiating branches of the hairs appressed to the leaf surface [Fig. 517]; styles (0.3–) 0.4–1 mm long; stigmas scarcely bilobed
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Each photo represents one species in this genus.