Keywords
VEGETATIVE
How to Cite
Abstract
Vascular epiphytes do not share distinguishing systematic or biological profiles. Taxonomic participation is broad although the group is dominated by higher ferns, members ofa few dicot families and monocotyledons, particularly orchids. Except for some general features that promote anchorage in tree crowns and aerial dispersal ofdiaspores, forms and life processes associated with epiphytism also occur in soil-rooted flora. Among the more pervasive characteristics ofcanopy-dependent vegetation are drought tolerance and mechanisms promoting access to unusual sources ofnutrient ions. Trophic mutualisms are especially common and diverse with ants playing a dominant role. Specific types ofepiphytes are described along with associated water ion balance mechanisms. Research topics that seem most likely to reveal significant information on the vegetative basis ofepiphytism are identified.
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