Xanthisma grindelioides
goldenweed, gumweed aster, rayless tansyaster
10–30+, simple or branched in distal 1/3, moderately stout to stout, not wiry, hairy or minutely stipitate-glandular.
basal often persistent;
cauline evenly spaced, blades oblong, obovate, lanceolate to spatulate or narrowly ovate to obovate, 7–60 × 2–13 mm, gradually reduced distally, margins usually evenly coarsely serrate to serrulate, teeth 4–16 per side, each tipped with white bristle 0.5–4 mm, faces sparsely to densely hairy (hairs subappressed), often minutely stipitate-glandular.
sparsely to densely hairy, often stipitate-glandular;
sometimes bracteate.
hemispheric to campanulate, 0.5–1 × 0.6–1.5 cm.
0.
15–50+;
corollas 5–8.5 mm.
in 3–5 series, oblong to broadly lanceolate, 2–9 mm, apices obtuse to acute, tipped by white seta, faces usually densely stipitate-glandular.
1–10+.
oblong to narrowly obovoid, 2–3.5 mm, ribs 12–24, densely whitish to tawny hairy;
pappi whitish to tawny, 3–7 mm, a few abaxial bristles to 1/3 of longest.
Xanthisma grindelioides
Varieties 2 (2 in the flora).
(Discussion copyrighted by Flora of North America; reprinted with permission.)
1. Plants tufted, 10–35 cm; leaves evenly distributed along stems, margins usually ciliate, sometimes spinulose-dentate, bristles usually 0.5–1.5 mm; heads 1 or often 2–5; peduncles 0.5–2 cm, often bracteate to proximal to heads | var. grindeloides |
1. Plants densely cespitose, mostly 3–8 cm; leaves mostly crowded at base of stem, margins conspicuously white-bristled (1.5–)2–4 mm; heads usually 1; peduncles 1–4 cm, usually ebracteate | var. depressum |
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