Rudbeckia is a plant genus of 23 species in the family Asteraceae. The name of this genus was given by Carolus Linnaeus in honor of his teacher at Uppsala University, Professor Olof Rudbeck the Younger (1660-1740), and his father, Professor Olof Rudbeck the Elder (1630-1702), both of whom were botanists.
The species are commonly called coneflowers and black-eyed-susans; all are native to North America and many species are cultivated in gardens for their showy yellow or gold flower heads.The species are herbaceous, mostly perennial plants (some annual or biennial) growing to 0.5-3 m tall, with simple or branched stems. The leaves are spirally arranged, entire to deeply lobed, 5-25 cm long. The flowers are produced in daisy-like inflorescences, with yellow or orange florets arranged in a prominent, cone-shaped head; "cone-shaped" because the ray florets tend to point out and down as the flower head opens.
Please join me for Floral Friday Fotos by linking your flower photos below, and leave a comment once you have done so!
Showing posts with label yellow. Show all posts
Showing posts with label yellow. Show all posts
Wednesday, May 23, 2012
FFF21 - CAPE DAISIES
Osteospermum is a genus belonging to the Calenduleae, one of the smaller tribes of the sunflower family (Asteraceae). Osteospermum used to belong to the genus Dimorphotheca, but only the annual species remain in that genus; the perennials belong to Osteospermum.
The scientific name is derived from the Greek osteon (bone) and Latin spermum (seed). It has been given several common names: African Daisy, South African Daisy, Cape Daisy and Blue-eyed Daisy. There are about 50 species, native to Africa, 35 species in southern Africa, and southwestern Arabia. They are half-hardy perennials or subshrubs. Therefore they do not survive outdoor wintry conditions, but there is still a wide range of hardiness.
Most widely sold cultivars are grown as annuals and are mainly hybrids of O. jucundum, O. ecklonis and O. grandiflorum and can be hardy to -2°C. If hardy, they can be grown as perennials or as shrubs. The photo is of a relatively newly introduced cultivar known as "Tradewinds Pure Yellow". They flower repeatedly and produce beautiful waves of colour during the growing season. This is a patented variety that was introduced in 2006 and the flowers are sterile and will not set seed.
Join me for Floral Friday Fotos by linking your flower photos below, and please leave a comment once you have done so!
The scientific name is derived from the Greek osteon (bone) and Latin spermum (seed). It has been given several common names: African Daisy, South African Daisy, Cape Daisy and Blue-eyed Daisy. There are about 50 species, native to Africa, 35 species in southern Africa, and southwestern Arabia. They are half-hardy perennials or subshrubs. Therefore they do not survive outdoor wintry conditions, but there is still a wide range of hardiness.
Most widely sold cultivars are grown as annuals and are mainly hybrids of O. jucundum, O. ecklonis and O. grandiflorum and can be hardy to -2°C. If hardy, they can be grown as perennials or as shrubs. The photo is of a relatively newly introduced cultivar known as "Tradewinds Pure Yellow". They flower repeatedly and produce beautiful waves of colour during the growing season. This is a patented variety that was introduced in 2006 and the flowers are sterile and will not set seed.
Join me for Floral Friday Fotos by linking your flower photos below, and please leave a comment once you have done so!
Wednesday, July 15, 2009
Melqua Barn in Yellow
Thursday, July 9, 2009
Wednesday, June 3, 2009
Monday, August 27, 2007
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