Asteraceae tribe Calenduleae
J. Phys. Chim. Hist. Nat. Arts88: 161. 1819
Introduced; most in Africa, also Atlantic Islands, Europe, and sw Asia, some are widely cultivated and become ± established in local floras.
Genera ca. 8, species 100+ (4 genera, 7 species in the flora).
Plants of Dimorphotheca cuneata (Thunberg) Lessing, a native of southern Africa, have been collected outside cultivation in Arizona (Gila County, ca. 1000 m): subshrubs or shrubs to 100 cm, leaves cuneate to obovate, 1–2(–3)cm, margins dentate to denticulate, faces ± glutinous, phyllaries usually 13, 6–9 mm, ray corollas abaxially bluish to violet, adaxially white, disc cypselae obovate to nearly orbiculate, 10 mm.
|1||Shrubs or trees; cypselae fleshy (drupelike)||Chrysanthemoides|
|1||Annuals, perennials, or shrubs; cypselae not fleshy (often tuberculate or ridged and/or winged)||> 2|
|2||Disc florets bisexual (some or all fertile)||Dimorphotheca|
|2||Disc florets all functionally staminate||> 3|
|3||Cypselae arcuate to ± coiled, abaxially tuberculate, sometimes winged||Calendula|
|3||Cypselae triquetrous-prismatic to clavate, ± tuberculate and/or winged||Osteospermum|