Re: Supervolute vernation. Finally a photo!
- Subject: Re: Supervolute vernation. Finally a photo!
- From: "Marek Argent" <email@example.com>
- Date: Fri, 22 Jan 2010 01:25:34 +0100
So, I suppose that the term "supervolute" refers
to the vernation of a solitary leaf
and "convolute" is the same but in reference to a
sequence of leaves
or a spadix within a
I modified a little the drawing sent by you
by placing the next leaf and we have the same.
In my library I found a document on Monstera
obliqua and there is a photo
of convolute vernation of leaves (page 5).
----- Original Message -----
Sent: Wednesday, January 20, 2010 5:17
Subject: [Aroid-l] 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
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
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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Convolute, supervolute, involute drawings copy.jpg
Description: JPEG image
Description: Adobe PDF document
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