Keywords
CATASETUM INTEGERRIMUM
How to Cite
Abstract
Most epiphytic orchids bear long-lived leaves of at least moderate xeromorphic character. Their canopies remain full the year round, maintained by. a balance between annual additions ofnew organs and abscissions ofold ones. Individual leaves persist for several seasons. Members of a few genera (e.g. Catasetum, Cyrtopodium, Dendrobium sect., Eugenanthe) generate crops of more mesomorphic organs at the beginning of each growing season and then abruptly shed their entire foliar display well before year's end. While the functional correlates of these two growth patterns are not known, many deciduous orchid taxa are decidedly more vigorous than persistent-leafrelatives. For example, Catasetum ifltegerrimum Hook., a very robust species with shortlived leaves, can flower' and achieve adult size in about two years under optimal conditions -- considerably less than half the time required for most wellgrown nondeciduous taxa to reach maturity (C. H. Dodson, personal communication).
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