Abstract:
:Data on flower colour polymorphism were recorded for 341 of some 426 species of Erica occurring in the south-western Cape, South Africa. Thirty-eight per cent of these Erica species are colour polymorphic, the incidence of polymorphism being greater than expected for ornithophilous species and lower than expected for anemophilous species. Both altitude and season of flowering are correlated with the incidence of colour polymorphism, with most polymorphs occurring in species which have relatively large altitudinal ranges and extended flowering periods. The mean corolla length for each of pink, purple and white flowers is significantly shorter than that for each of red, orange, yellow and green flowers, suggesting that these two sets of colours correspond with entomophily and ornithophily, respectively. There are no Erica species with blue flowers. We suggest that the patterns of colour polymorphism, because of their relationships with the behaviour of pollinators, may reflect patterns of speciation in the genus.
journal_name
Oecologiajournal_title
Oecologiaauthors
Rebelo AG,Siegfried WRdoi
10.1007/BF00379677subject
Has Abstractpub_date
1985-03-01 00:00:00pages
584-590issue
4eissn
0029-8549issn
1432-1939pii
10.1007/BF00379677journal_volume
65pub_type
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