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
firstname.lastname@example.org [mailto:email@example.com] On Behalf Of ExoticRainforest
Sent: Thursday, May 01, 2008 9:31
Subject: [Aroid-l] Epiphyllums/Off
I appreciate that Julius. But I never intended to start a
non-aroid discussion on Aroid l. I have sent a note to Dr. Croat in hopes
he will provide me with a better description of what is scientifically
understood to be a rain forest.
I am NOT a Cactus person, but will add my two cents to this mix.
It appears that this ''debate'' is now centered around the narrow determination
of the difference between a ''rain forest'' and a ''tropical deciduous
forest". Being from Trinidad, and having traveled in Fr.
Guyana, I can assure all that tree-growing Cacti I am familiar with, in most
cases do NOT make a distinction, and that they do not suddenly stop growing or
existing in what the experts consider ''true rain forests''. I have
seen climbing epiphitic Cacti high in the wet canopy, who knows what genera
they may be determined to belong to once they are collected, and Taxonomists
get their hands on them. If, as it is being said, the range of the
Cactus genus Epiphyllum is from Southern Mexico, all of Central America, and
all down the Western side of S. America, I can assure all that in many of these
areas, especially in Panama and W. Colombia, W. Bolivia and W. Brazil there are
REAL rain forests with Cacti growing in them, I don`t know how many species and
of what genera
they may be!
The discussion also got turned around, as it was Steve who was ''warning'' that
the cacti in question would NOT tollerate a freeze, the other guy twisted this
around to say that Steve had written that they WOULD take low temps./freezes.
My two cents.