Boltonia
doll's-daisy
erect to ascending, branched distally (ribbed), glabrous.
basal (withering by flowering) and cauline; alternate;
sessile (sometimes decurrent);
blades 1-nerved, linear, subulate to lanceolate or oblanceolate (bases attenuate, cauline sometimes decurrent), margins entire to serrulate (teeth callous-tipped), (apices acute to acuminate) faces glabrous.
conic to hemispheric, obscurely pitted, epaleate.
20–60, pistillate, fertile;
corollas white to lilac (laminae linear to elliptic).
50–400+, bisexual, fertile;
corollas yellow, tubes shorter than funnelform throats, lobes 5, erect, triangular;
style-branch appendages deltate.
30–55 in 3–6 series, 1-nerved (midribs thickened, resinous; flat), linear to oblanceolate or spatulate, unequal to subequal, margins ± membranaceous, faces glabrous.
radiate, (10–100+) in leafy, corymbiform or paniculiform arrays. (Peduncles bracteate or ebracteate, bracts leaflike or scalelike.) Involucres hemispheric, (2–5 ×) 3–14 mm.
dimorphic (brownish);
ray ± triquetrous, margins arrowly winged, ribs 2 abaxial, 1 adaxial;
disc obovoid to cuneate or obcordiform, laterally compressed, margins winged or not, resin ducts present, faces often puberulent;
pappi persistent, usually of 2–3 sclerified awns plus (0–)7–12 shorter bristles or scales in 1 series.
= 9.
Boltonia
Species 5 (5 in the flora).
(Discussion copyrighted by Flora of North America; reprinted with permission.)
1. Disc cypselae lacking wings, or if present wings 0.01–0.1 mm wide; pappus awns 0–0.4 mm | → 2 |
1. Disc cypselae wings 0.1–0.5 mm wide; pappus awns (0.3–)0.4–2 mm | → 3 |
2. Heads in corymbiform arrays; outer phyllaries 1.7–2.8 mm; ray laminae 5–13 mm | B. asteroides |
2. Heads in paniculiform arrays; outer phyllaries 1.2–1.6 mm; ray laminae 3–7.5 mm | B. caroliniana |
3. Bases of cauline leaves decurrent; rhizomes and stolons absent; Illinois, Missouri | B. decurrens |
3. Bases of cauline leaves not decurrent; rhizomes or stolons present or absent; widely distributed or not in Illinois or Missouri. | → 4 |
4. Heads in paniculiform arrays, primary branches mostly spreading; only proximal bracts leaflike, 8–55 mm, others reduced and linear to linear-oblanceolate or subulate, 2–10(–15) mm | B. diffusa |
4. Heads in corymbiform arrays, branches spreading to ascending; most bracts leaflike, 10–120 mm, only peduncle bracts reduced, linear to subulate or ovate to linear-oblanceolate, 1–12(–62) mm | → 5 |
5. Pappus awns 0.3–0.8 mm; outer phyllaries 1.3–2 mm; ray laminae 5–9 mm; Florida panhandle to se Louisiana | B. apalachicolensis |
5. Pappus awns 0.4–2 mm; outer phyllaries 1.5–3.8 mm; ray laminae 5–13 mm; e North America, Idaho, Oregon | B. asteroides |
OR
WA
Flora NW
PNW Herbaria
WildflowerSearch
iNaturalist
USDA Plants Database
