Boltonia asteroides
asterlike boltonia, boltonia, star boltonia, white doll's-daisy
erect.
blades linear or lanceolate to oblanceolate;
cauline 20–220 × 2–30 mm, bases not decurrent.
5–220 mm;
bracts 0–15, linear to subulate or ovate to oblanceolate, 2–12(–62) mm.
3–5 × 4–14 mm.
20–60;
corollas white to lilac, laminae 5–13 mm, tubes 0.5–1.7 mm.
65–170;
corollas 1.5–2.6 mm.
in 3–5 series, subulate, linear, lanceolate, or spatulate, subequal, 0–6 merging down peduncles;
outer 1.5–3.8 × 0.4–1.6 mm;
inner 2.1–4 × 0.3–1.5.
usually in corymbiform, sometimes paniculiform arrays, branches spreading to ascending, most bracts leaflike, 15–120 × 2–18 mm.
obovoid, 1–3 × 0.8–2 mm, wings 0.1–0.5 mm wide;
pappi awns 0.4–2 mm (lengths ± 2/3 cypselae).
Boltonia asteroides
Varieties 3 (3 in the flora).
Variety asteroides is restricted to the coastal plain province. Varieties latisquama and recognita occur in the central lowland province and in the highland provinces between it and the coastal plain; var. recognita is also disjunct in Idaho and Oregon.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
1. Phyllaries linear to linear-attenuate or subulate, apices acute; pappus awn lengths to 2/3 cypselae | var. asteroides |
1. Phyllaries spatulate, oblanceolate, or linear-oblanceolate, apices cuspidate; pappus awn lengths 2/3 + cypselae | → 2 |
2. Phyllaries spatulate to obovate-spatulate, membranaceous margins broad, (2–)2.5–6 mm wide | var. latisquama |
2. Phyllaries, oblanceolate to linear-oblanceolate, membranaceous margins ± narrow, 1–2.5(–3) mm wide | var. recognita |
- Local floras:
OR, 
WA - Local Web sites:
Flora NW, 
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IL Wildflowers, 
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MD Biodiversity, 
MI Flora, 
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PNW Herbaria 
WildflowerSearch
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USDA Plants Database- LBJ Wildflower Center
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