Calendula

Linnaeus
Sp. Pl. 2: 921. 1753.
,
Gen. Pl. ed. 5, 393. 1754.
Common names: Pot marigold
Etymology: Latin calends, first day of the month, and -ula, tendency perhaps meaning “through the months” and alluding to ± year-round flowering
Treatment appears in FNA Volume 19. Treatment on page 381. Mentioned on page 30, 379.

Annuals, perennials [subshrubs], 5–50(–70+) cm. Stems procumbent to erect, glabrous or arachnose and/or stipitate-glandular. Leaves sessile or petiolate; blades elliptic, obovate, or oblong to oblanceolate, spatulate, or linear (bases sometimes clasping), margins entire or denticulate, faces sparsely arachnose and/or stipitate-glandular. Heads borne singly. Involucres campanulate to hemispheric or broader, 10–30+ mm diam. Phyllaries 13–40+ in 2+ series, lanceolate to lance-linear. Receptacles flat. Ray florets 13–50(–100+) in 1–3+ series; corollas yellow to orange, laminae linear to oblanceolate. Disc florets 20–60(–150+), functionally staminate; corollas yellow, reddish, or purplish, tubes shorter than ± campanulate throats. Cypselae arcuate to ± coiled (usually some beaked, some 2–3-winged, some both beaked and winged), abaxial faces usually tuberculate and/or transversely ridged. x = 11.

Distribution

Introduced; Macaronesia, Mediterranean Europe, Near East, North Africa, widely cultivated, sometimes escaping and/or persisting.

Discussion

Species 15 or fewer (2 in the flora).

Key

1 Phyllaries 13–21+, 6–10+ mm; ray florets 13–18+, corolla laminae 5–8(–12+) mm Calendula arvensis
1 Phyllaries 12–40+, (8–)10–12+ mm; ray florets 30–50(–100+), corolla laminae 12–20+ mm. Calendula officinalis
... more about "Calendula"
John L. Strother +
Linnaeus +
Pot marigold +
Macaronesia +, Mediterranean Europe +, Near East +, North Africa +, widely cultivated +  and sometimes escaping and/or persisting. +
Latin calends, first day of the month, and -ula, tendency +  and perhaps meaning “through the months” and alluding to ± year-round flowering +
Sp. Pl. +  and Gen. Pl. ed. +
1753 +  and 1754 +
heyn1974a +
Compositae +
Calendula +
Asteraceae tribe Calenduleae +