Calendula spp.
Family: Asteraceae
Calendula image
Luigi Rignanese  
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.