----- Original Message -----
From: ted.held at us.henkel.com
To: Discussion of aroids
Sent: Thursday, March 20, 2008 9:36 PM
Subject: [Aroid-l] Cryptocoryne Leaves
Marek,
Cryptocoryne leaves are adaptable things. If you plant three plants, each in a different water level, you will typically get three different leaf morphologies. If you switch one of those plants to another water depth you may lose all the existing leaves, since those leaves are probably not well suited to the new environment. New leaves that emerge in the new situation will be suited to the new conditions. You hear that this or that Crypt plant has two different-looking leaves on the same plant. This is what has happened to create such plants.
This means that if you buy a plant with soft leaves and plant it emerse, the old leaves will lay around and look strange for a couple of months (if they don't die first). But any new leaves will be comparatively tough and stand tall, more or less, in the emerse situation.
I know this list has a devil of a time with plant IDs. Believe me, Crypts are ridiculously more complex if the leaves are all you have to go on. Then there are the issues of rampant polyploidy, unscrupulous importers and dealers, poor historical records regarding IDs and collection locations, and only a handful of real specialist hobbyists.
I'm just glad you have a couple of plants and have taken the time to observe them.
Ted.
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