Re: [Aroid-l] Cataphill

From: DAVID LEEDY <djleedy at sbcglobal.net> on 2016.10.23 at 02:10:17(23694) Peter, Thank you so much for taking the time to respond to my inquiry. As I understood it: A cataphyll is a modified leaf which lacks a blade and in appearance corresponds to a petiole sheath. (DOES THIS MEAN THAT A PEDUNCLE DOES NOT HAVE A CATAPHYLL??) Does a cataphyll occur only in Araceae or might it be found elsewhere (name some examples). What is the function of the cataphyll ? (to provide protection to the emerging petiole and leaf??) Do some (many or most) Aroids have cataphylls? This is really weird language "corresponds to a petiole sheath" Why not say that the cataphyll sheaths the petiole? As I recall, from a conversation about 30 or 40 years a go, a cataphyll that falls off the plant is called a deciduous cataphyll and one that stays on is called a persistent cataphyll. Your comments and corrections are, as always, appreciated. My very best regards, David Leedy HTML +More On Friday, October 21, 2016 4:21 PM, Peter Boyce wrote: Hello David, Taken from Flora of Thailand cataphyll – a modified leaf which lacks a blade and in appearance corresponds to a petiole sheath; may be used to describe other leaf types whose technical names are defined by position rather than form, e.g., prophylls are usually of cataphyll shape in Araceae, compare, prophyll. prophyll – the first leaf of a branch (or sympodial unit); in Araceae almost always a 2-keeled cataphyll, often confused with cataphyll; cataphyll refers to a particular type of morphology (reduced leaf), prophyll refers to the position of the leaf along a branch. On 20 October 2016 at 23:14, DAVID LEEDY wrote: I am seeking a written description of the term cataphyll, including the function it performs. Is it found only at the base of peduncles or also at the base of petioles? Examples including images of each. Is it only found in the Aroid plant family or elsewhere? Thanks for your help. David Leedy ______________________________ _________________ Aroid-L mailing list Aroid-L@www.gizmoworks.com http://www.gizmoworks.com/ mailman/listinfo/aroid-l _______________________________________________ Aroid-L mailing list Aroid-L@www.gizmoworks.com http://www.gizmoworks.com/mailman/listinfo/aroid-l ------=_Part_479360_532409384.1477188617359-- --==============20856196089873101==

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