Systematic Anatomy and Phylogeny of Mexican Columnar Cacti
نویسندگان
چکیده
منابع مشابه
Sonoran Desert Columnar Cacti and the Evolution of Generalized Pollination Systems
We studied variation in flowering phenology, fruit and seed set, and the abundance of the pollinators of four species of night-blooming Sonoran Desert columnar cacti for up to eight years at one site in Mexico and one year at one site in Arizona. We determined how spatiotemporal variation in plant–pollinator interactions affects the evolution of generalized pollination systems. We conducted pol...
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Columnar cacti occur naturally in many habitats and environments in the Americas but are conspicuously dominant in very dry desert regions. These majestic plants are widely regarded for their cultural, economic, and ecological value and, in many ecosystems, support highly diverse communities of pollinators, seed dispersers, and frugivores. Massive amounts of water and other resources stored in ...
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Dozens of arthropod species are known to feed and breed in the necrotic tissues (rots) of columnar cacti in the Sonoran Desert. Because the necrotic patches are ephemeral, the associated arthropods must continually disperse to new cacti and therefore the populations of any given species are expected to show very little local genetic differentiation. While this has been found to be true for the ...
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THE GENUS Hesperomannia (Compositae, tribe Mutisieae) has attracted interest because of its arborescent habit, its restriction to certain of the Hawaiian Islands, and its rarity in the locations in which it is found. The purpose of the present paper is to survey the anatomical diversity which exists in the genus and relate it to gross morphological characters in an attempt to achieve an accepta...
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ژورنال
عنوان ژورنال: Annals of the Missouri Botanical Garden
سال: 1978
ISSN: 0026-6493
DOI: 10.2307/2398781