September 18
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Plant Species of the genus Argyranthemum

Information about this genus
Name: Argyranthemum
Cultivation: CULTIVATION: All are marginally frost hardy and in cold climates need to be brought under shelter in winter. For permanent outdoor use they prefer a temperate climate with a distinct cool winter. Cutting-grown plants can be raised to flowering size in 6 months, so they can be treated as annuals. Soil should be very well drained and not too rich, and a sunny position is essential. Young plants can be shaped by pinching out growing tips; pruning lanky old plants should be done with caution, as they often die if cut back hard. Propagate from tip cuttings at any time of year, preferably in autumn for a spring and summer display.
Description: Often treated as perennials, the 24 members of this genus from the Canary Islands and Madeira are evergreen shrubs that under suitable conditions may develop quite thick, woody stems, though usually living less than 10 years. Belonging to the huge daisy family, Argyranthemum was formerly often merged with the genus Chrysanthemum. They are popular in gardens and as cut flowers in the form of numerous cultivars, most with ?double? or ?semi-double? flowerheads in shades from white through pink to rose-purple (less commonly yellow), appearing over a long season. Cultivars are conventionally classified under Argyranthemum frutescens, but are probably of hybrid origin, with species such as A. foeniculaceum and A. maderense present in their parentage. All are shrubs that branch low but generally above ground into brittle stems with rather crowded leaves clustered at their tips; the leaves vary from coarsely toothed to deeply dissected into many narrow lobes, and have a slightly aromatic, bitter smell when bruised. The long-stalked flowerheads are borne in loose groups of 2 to 5 terminating the branches. In the original ?single? forms each head consists of a ring of blunt-tipped ray florets (?petals?) around an ?eye? of tiny yellowish disc florets. In the ?doubles? the disc florets are replaced by ray florets; in another large group of cultivars the disc florets are elongated and colored, giving rise to an anemone-form or ?semi-double? flowerhead.

Specie Vernacular Zone
Argyranthemum frutescens 9-10



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