Flora of North America species comparison

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Senecio integerrimus var. ochroleucus

Senecio integerrimus var. major
Photo is of parent taxon

pale-yellow ragwort, western groundsel, white flower mountain butterweed, white western groundsel
Photo is of parent taxon

big-head groundsel, lambs-tongue ragwort, lambstongue groundsel
Herbage

arachnose, tomentose, or villous, unevenly glabrescent, at flowering.

usually copiously arachnose, tomentose, or villous at flowering.
Leaves

basal and proximal cauline distinctly petiolate;

blades (cauline) usually ovate to rounded-deltate, sometimes obovate to oblanceolate.

basal and proximal cauline distinctly petiolate;

blades (cauline) usually lanceolate to oblanceolate.
Ray florets

usually 5;

corollas white or ochroleucous, laminae (5–)10–15(–20) mm.

usually 5;

corollas yellow, laminae mostly 5–8 mm.
Phyllaries

± linear, 7–10 mm, tips green or minutely black.

linear-subulate, 8–12 mm, tips usually green, minutely, if at all, black.
Heads

(3–)8–12(–40+).

6–12(–30+).

Senecio integerrimus var. ochroleucus

Senecio integerrimus var. major
Phenology Flowering spring. Flowering spring.
Habitat Moist openings in coniferous woodlands Openings in coniferous woodlands and woodland-sagebrush associations
Elevation 600–1700 m (2000–5600 ft) 100–3600 m (300–11800 ft)
Distribution
from FNA
CA; ID; MT; OR; WA; AB; BC
[BONAP county map]
from FNA
CA; NV; OR
[BONAP county map]
Discussion

Variety major is most frequent in the Sierra Nevada, especially on the western slope; eastward, it passes into var. exaltatus.

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Source FNA vol. 20, p. 557. FNA vol. 20, p. 557.
Parent taxa Asteraceae > tribe Senecioneae > Senecio > Senecio integerrimus Asteraceae > tribe Senecioneae > Senecio > Senecio integerrimus
Sibling taxa
S. integerrimus var. exaltatus, S. integerrimus var. integerrimus, S. integerrimus var. major, S. integerrimus var. scribneri
S. integerrimus var. exaltatus, S. integerrimus var. integerrimus, S. integerrimus var. ochroleucus, S. integerrimus var. scribneri
Synonyms S. lugens var. ochroleucus, S. cordatus, S. exaltatus subsp. ochraceus, S. leibergii, S. ochraceus S. eurycephalus var. major, S. lugens var. megacephalus, S. mendocinensis, S. whippleanus
Name authority (A. Gray) Cronquist: Leafl. W. Bot. 6: 48. (1950) (A. Gray) Cronquist: Aliso 4: 100. (1958)
Web links 
Unless otherwise noted, all data comes from the online version of the Flora of North America, who have made most of their content available via a Creative Commons license (CC BY 4.0).



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