Behalf Of Marek Argent
Sent: Thursday, January 21, 2010
To: Discussion of aroids; Steve
Subject: Re: [Aroid-l] Supervolute
vernation. Finally a photo!
----- Original Message -----
January 20, 2010 5:17 PM
Supervolute vernation. Finally a photo!
I screwed up big
time and inserted the wrong drawing.
These are the correct drawings from Stern's showing the placement of the
midrib. It appears the only difference in supervolute and convolute is a
leaf forming around another leaf but frankly I still don't have a completely
satisfactory explanation. I try almost daily on my website to make
subjects like this clearer for anyone interested in aroids that does not have
or is not interested in earning a degree in botany. I am now to the
point of completely removing the subject since I am no longer sure I fully
understand it or can help anyone else to understand.
I don't believe any definition in print in any of the 5 botanical dictionaries I
now own make the distinction (if any) between convolute and supervolute
clear. At least in the dictionaries they appear to be synonymous and are
one and the same.
Marek Argent wrote:
We cannot talk about vernation types not seeing the
midrib as it is presented on the second drawing.
It can as well be a half of a leaf rolled
The third drawing (convolute) is what I thought about
(but I was afraid to say) -
that the term "convolute" may refer only to
at least two objects
like one leaf inside another one or a spadix
wrapped by a spathe.
Anyway in my cord photos, the third type, although
probably not occuring in Araceae
is possible, so it must have a name too.
It's becoming complicated...
These drawings are
from William T. Stern's Botanical Latin, 4th edition.
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