Compilation
Chaptalia albicans

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Name

Identification
Chaptalia crispula Greene [family ASTERACEAE ] (stored under name); Verified by Greene, 1906 Isotype of Chaptalia crispula Greene [family ASTERACEAE ] Verified by Greene, 1906 Chaptalia crispula Greene [family ASTERACEAE ] Verified by L. Katinas, 1997 Chaptalia nutans (L.) Polak [family ASTERACEAE ] Verified by Coulter, Chaptalia albicans (Sw.) Vent. ex Steud. [family ASTERACEAE ] Verified by G. L. Nesom, 1984
Related name
  • Chaptalia albicans
  • Chaptalia nutans
  • Chaptalia crispula
Common name
  • White sunbonnet, Flora of North America Vol. 19

Flora

Entry for Chaptalia albicans (Swartz) Ventenat ex B. D. Jackson [family COMPOSITAE]
Herbarium
Flora of North America (FNA)
Collection
Flora of North America
Resource Type
Reference Sources
Entry From
Flora of North America, Vol 19,
Names
Chaptalia albicans (Swartz) Ventenat ex B. D. Jackson [family COMPOSITAE], Index Kew, 1: 506. 1893
Tussilago albicans Swartz [family COMPOSITAE], Prodr., 113. 1788
Chaptalia leiocarpa (de Candolle) Urban [family COMPOSITAE]
Treatment Author(s)
Guy L. Nesom
Information
Leaves sessile or nearly so; blades obovate to obovate-elliptic, 2–14 cm, margins retrorsely serrulate to denticulate-apiculate, abaxial faces white-tomentose, adaxial faces green, glabrous or glabrate. Heads erect in bud, flowering, and fruit. Peduncles ebracteate, 6–15 cm in flowering, 12–37 cm in fruit, dilated distally. Florets: outer pistillate, corollas creamy white, rarely purple tinged, laminae 0.2–0.3 mm wide; inner florets bisexual, fertile. Cypselae 8.4–11.2 mm, beaks filiform, lengths 0.5–0.6+ times bodies, faces glabrous or sparsely glandular (usually only along the nerves). 2n = 24, ca. 29.
Phenology
mar-may (spring), jun-jul (summer), nov (fall)
Altitude range
0–50 m;
Distribution
MexicoWest IndiesCentral America.USA Fla.
Discussion
Chaptalia albicans was treated by A. Cronquist (1980) as C. dentata (Linnaeus) Cassini. The latter is known only from the West Indies (G. Nesom 1984) and contrasts with C. albicans in having outer pistillate florets with corollas white to greenish (versus white) and laminae (0.2–)0.4–0.7 mm (versus 0.2–0.3 mm) wide, style branches of pistillate florets (0.5–)0.7–0.9 mm (versus 0.8–1.3 mm), cypselae 5.5–7.5(–8.5) mm (versus 8.4–11.2 mm), orange (versus white) carpopodia, and pappus bristles 5.8–8.5 mm (versus 7.8–10.5 mm).

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