Atypical Flowers Can Be as Profitable as Typical Hummingbird Flowers
نویسندگان
چکیده
منابع مشابه
Can red flowers be conspicuous to bees? Bombus dahlbomii and South American temperate forest flowers as a case in point.
It has been argued that trichromatic bees with photoreceptor spectral sensitivity peaks in the ultraviolet (UV), blue and green areas of the spectrum are blind to long wavelengths (red to humans). South American temperate forests (SATF) contain a large number of human red-looking flowers that are reported to be visited by the bumblebee Bombus dahlbomii. In the present study, B. dahlbomii's spec...
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We examine the suitability of ornithophilous flowers and sphingophilous flowers in Ipompsis and Aquilegia for nectar foraging by the hummingbird Selasphorus rufus. In S. rufus, bill length averages 18.9 mm in females and 17.3 mm in males. Maximal tongue extension approximates bill length, suggesting that birds can feed from floral tubes up to 33.5 mm in length. However, their ability to do so i...
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Floral color changes and retention of old flowers are frequently combined phenomena restricted to the floral guide or single flowers in few-flowered inflorescences. They are thought to increase the attractiveness over long distances and to direct nearby pollinators toward the rewarding flowers. In Tibouchina pulchra, a massively flowering tree, the whole flower changes its color during anthesis...
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The pigment of the yellow flowers of the silk oak (Grevillea robusta, Cunningham) does not appear to have been investigated heretofore. If the dried material is extracted with ether, the solution shows typical absorption maxima at 483 and 453 rnp, corresponding to the spectrum of p-carotene. The rather blurred borders of these bands indicate, however, the presence of other polyenic pigments in ...
متن کاملCarrion flowers
In this Quick Guide, Johnson introduces the reader to carrion flowers, which evolved to mimic rotting flesh. This adaptation attracts insects that facilitate pollination.
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ژورنال
عنوان ژورنال: The American Naturalist
سال: 2018
ISSN: 0003-0147,1537-5323
DOI: 10.1086/699836