Compilation
Cotyledon laxa

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Name

Identification
Cotyledon laxa S. Watson [family CRASSULACEAE ] (stored under name); Verified by Not on Sheet, Dudleya cymosa (Lem.) Britton and Rose [family CRASSULACEAE ] Verified by Moran, R. V., 1951
Related name
  • Dudleya cymosa
  • Cotyledon laxa
Common name
  • Santa Clara Valley dudleya, Flora of North America Vol. 8

Flora

Entry for Dudleya abramsii Rose subsp. setchellii (Jepson) Moran [family CRASSULACEAE]
Herbarium
Flora of North America (FNA)
Collection
Flora of North America
Resource Type
Reference Sources
Entry From
Flora of North America, Vol 8,
Names
Dudleya abramsii Rose subsp. setchellii (Jepson) Moran [family CRASSULACEAE], J. Bot. Res. Inst. Texas, 1: 1015. 2007 ,
Cotyledon laxa (Lindley) S. Watson var. setchellii Jepson [family CRASSULACEAE], Fl. W. Calif., 267. 1901
Dudleya cymosa (Lemaire) Britton & Rose subsp. setchellii (Jepson) Moran [family CRASSULACEAE]
Dudleya setchellii (Jepson) Britton & Rose [family CRASSULACEAE]
Treatment Author(s)
Reid V. Moran
Information
Caudices 2–5-branched, 1–2 cm diam. Leaves: rosettes 1–5; blade oblong-lanceolate or tapering from base, semiterete, 3–8 × 0.5–1 cm. Inflorescences: floral shoots 5–20 × 0.2–0.4 cm; proximalmost leaf blades 10–30 mm; branches 2–3, simple. Pedicels 1–5 mm. Flowers: calyx 4–5 × 2–5 mm; petals connate 1–1.5 mm, unmarked pale yellow, almost white, not red-lineolate, 7–12 × 2–3 mm, tips erect. 2n = 34.
Conservation Status
of conservation concern
Phenology
Flowering spring
Altitude range
100–300 m
Distribution
USA Calif.
Discussion
Subspecies setchellii is known from the Coyote Valley area, Santa Clara County; it is considered seriously threatened (California Native Plant Society, http://cnps.web.aplus.net/cgi-bin/inv/inventory.cgi). Although placed formerly with Dudleya cymosa, it is clearly closer to D. abramsii and especially to subsp. murina, which also grows on serpentine and at about the same elevation but some 200 kilometers to the south. Subspecies setchellii tends to be smaller, with petals unmarked and less sharply acute.

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