Gaillardia pinnatifida |
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red dome blanketflower, yellow blanket flower |
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Habit | Perennials (sometimes flowering first year, sometimes rhizomatous), (5–)15–35+ cm. |
Leaves | basal and cauline, mostly restricted to proximal 1/3–1/2; petiolar bases 0–5+ cm; blades mostly oblanceolate to spatulate, 3–6(–12) cm × 3–18(–30) mm, margins mostly pinnatifid, distal sometimes toothed or entire (rarely all linear, entire), faces closely strigillose to shaggily villous. |
Peduncles | (4–)8–25+ cm. |
Ray florets | 0 or 5–14; corollas usually uniformly yellow, sometimes proximally and/or abaxially reddish, 10–25+ mm. |
Disc florets | (30–)60–100+; corollas usually proximally ochroleucous or yellow and distally purplish, rarely wholly yellow, tubes 0.8–1 mm, throats campanulate to plumply urceolate, 3–4.5 mm, lobes broadly deltate to deltate-ovate, 0.5–1 mm, jointed hairs 0.3+ mm. |
Phyllaries | 20–30, ovate- to lanceolate-attenuate, 7–12+ mm, hispidulous to villous (hairs often jointed). |
Cypselae | obpyramidal, 1–3 mm, hairs 1–2 mm, inserted at bases and on angles and faces; pappi of 8–11 lanceolate, aristate scales 3–7 mm (scarious bases 1.5–4 × 0.5–1.5 mm). |
Receptacular | setae usually 1–3 mm, rarely wanting. |
2n | = 34. |
Gaillardia pinnatifida |
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Phenology | Flowering Mar–Oct, mostly May–Jul. |
Habitat | Clays or sandy soils, often disturbed places, in grasslands, desert scrub-lands, or pinyon woodlands |
Elevation | 900–2000 m (3000–6600 ft) |
Distribution |
AZ; CO; NM; NV; OK; TX; UT; Mexico (Chihuahua, Coahuila, Durango, Sonora)
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Discussion | Some plants, especially from Arizona, included here in Gaillardia pinnatifida, have mostly narrow, undivided leaf blades (mostly 3–8+ mm wide, villous to sparsely strigillose; var. linearis) and intergrade with similar plants called G. multiceps, which have sparsely and minutely hispidulous or glabrate leaf blades. Plants from Utah with yellow disc corollas and densely gland-dotted leaves, included here in Gaillardia pinnatifida, have been recognized as G. flava. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 21, p. 423. |
Parent taxa | Asteraceae > tribe Heliantheae > subtribe Gaillardiinae > Gaillardia |
Sibling taxa | |
Synonyms | G. flava, G. gracilis, G. mearnsii, G. pinnatifida var. linearis |
Name authority | Torrey: Ann. Lyceum Nat. Hist. New York 2: 214. (1827) |
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