Osteospermum

Linnaeus

Sp. Pl. 2: 923. 1753.

,

Gen. Pl. ed. 5, 395. 1754.

Etymology: Greek osteon, bone, and sperma, seed, alluding to hard fruits of original species
Treatment appears in FNA Volume 19. Treatment on page 382. Mentioned on page 30, 379.
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Perennials, subshrubs, or shrubs [annuals], 5–150+ cm. Stems procumbent to erect [prostrate], glabrous or arachnose to piloso-hirtellous and/or stipitate-glandular. Leaves sessile or petiolate; blades orbiculate, elliptic, or oblong to oblanceolate, lanceolate, or linear, margins entire or denticulate [pinnately lobed], faces glabrous or sparsely arachnose and/or stipitate-glandular, often glabrate. Heads borne singly [in corymbiform to umbelliform arrays]. Involucres campanulate to hemispheric or broader, 5–20+ mm diam. Phyllaries 5–21+ in 1–2(–3+) series, lanceolate to lance-linear (apices ± attenuate). Receptacles flat to conic. Ray florets 10–21+ in ± 1 series; corollas whitish to purplish or yellow to orange, laminae ± oblong-elliptic to oblanceolate. Disc florets 12–50+, functionally staminate; corollas yellow or purplish, tubes shorter than the ± campanulate throats. Cypselae triquetrous-prismatic to clavate, often ± tuberculate or ridged and/or winged. x = 10.

Distribution

Introduced; Africa, widely cultivated, sometimes escaping and/or persisting.

Discussion

Species ca. 75 (2 in the flora).

Selected References

None.

Key

1 Leaf blades obovate or oblong to oblanceolate, 30–50(–100+) × 0–20(–40+) mm; ray corollas purplish to whitish Osteospermum ecklonis
1 Leaf blades cuneate to clavate, 3–12(–20+) × 1–4+ mm; ray corollas yellow to orange. Osteospermum spinescens
... more about "Osteospermum"
John L. Strother +
Linnaeus +
Africa +, widely cultivated +  and sometimes escaping and/or persisting. +
Greek osteon, bone, and sperma, seed, alluding to hard fruits of original species +
Sp. Pl. +  and Gen. Pl. ed. +
1753 +  and 1754 +
Compositae +
Osteospermum +
Asteraceae tribe Calenduleae +