This section is from the book "The Standard Cyclopedia Of Horticulture Vol2", by L. H. Bailey. See also: Western Garden Book: More than 8,000 Plants - The Right Plants for Your Climate - Tips from Western Garden Experts.
(named for the late Wm. R. Dudley, professor of botany in Stanford University). Crassu-laceie. Shortly caulescent or acaulescent perennials, with flat, linear to ovate, acute basal leaves: flowers in short or elongated panicles, orange-yellow or red, rarely white: leaves on flowering branches much shorter and relatively broader than the basal ones, sessile or clasping: corolla nearly cylindrical or slightly angled, the segments united below the middle; stamens twice as many as the calyx-lobes: carpels erect, many-sided. - Some 60 species have been described, all from the west coast of N. Amer. None of them has proved very satisfactory as a bedding plant, and as a rule the species do not compare with the echeverias in horticultural value. The following species are described in this work under Cotyledon (p. 868):
D. Cotyledon, Brit. & Rose, as C. californica.
D. pulverulenta, Brit. & Rose, as C. pulverulenta.
D. Purpusii, Brit. & Rose, as C. Purpusii.
D. lanceolata, Brit. & Rose, as C. lanceolata.
J. N. Rose.