Senecio integerrimus var. ochroleucus
Senecio integerrimus var. scribneri
pale-yellow ragwort, western groundsel, white flower mountain butterweed, white western groundsel
Scribner's ragwort
arachnose, tomentose, or villous, unevenly glabrescent, at flowering.
usually villous, sometimes arachnose or tomentose, at flowering.
basal and proximal cauline distinctly petiolate;
blades (cauline) usually ovate to rounded-deltate, sometimes obovate to oblanceolate.
basal and proximal cauline ± petiolate;
blades (cauline) oblong or lanceolate to sublinear (6–10 × 0.5–2 cm).
usually 5;
corollas white or ochroleucous, laminae (5–)10–15(–20) mm.
probably mostly 5;
corollas yellow, laminae 12–15 mm.
± linear, 7–10 mm, tips green or minutely black.
± linear, 10–15 mm, tips usually green, rarely black.
(3–)8–12(–40+).
3–6(–16+).
Senecio integerrimus var. ochroleucus
Senecio integerrimus var. scribneri
Of conservation concern.
Variety scribneri is poorly known and seldom collected. It is distinguished by its relatively larger heads and narrower leaves and its indument (in a region where var. integerrimus is notably glabrate).
(Discussion copyrighted by Flora of North America; reprinted with permission.)
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