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  [Aroid-l] Epiphyllums/Off topic
From: Thomas.Croat at mobot.org (Tom Croat) on 2008.05.05 at 13:21:50(17555)
Dear Steve:

The term "rain forest" is not a standard or formal
designation. In the Holdridge Life Zone System which I use the term
"rain forest" is used in a variety of designations. A standard range of
wetness would range from Tropical dry forest to Premontane dry forest to
Tropical moist forest, Premontane wet forest, Tropical wet forest,
Tropical rain forest, Premontane rain forest, Lower montane rainforest,
Montane rain forest. The effective degree of wetness is the critical
feature and may be owing to a lot of rain or a cooler temperature and
thus a reduced amount of transevaporation so that a single life zone
could range form sea level to 2000 m depending on the amount of
precipitation. Pluvial lowland forest is the wettest, hottest and is
rather restricted, known only from NW S. America in Colombia where it
may rain 36 feet a year.

Tom

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