Lamiaceae & Verbenaceae Week: Petrea volubilis

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Samir Mehta

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Jul 10, 2011, 11:56:51 AM7/10/11
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Dear Fellow group-members,

The images in this post consist of a Petrea volubilis 'classical (first 2 images) from one plant and the rest of the images from another plant, the latter being a scandent shrub, 10-12 ft tall.

I was not sure whether the scandent shrub images were indeed of Petrea volubilis because they looked so different until I saw something similar in Top Tropicals labeled Petrea arborea. A quick check with the ars-grin database confirmed the taxon listed as a synonym of P. volubilis.

I'm a trifle surprised that the variation has not been listed as a sub-species for the morphological (in structure) difference (subject to my identification being correct) is quite evident and significant.

Regards,

Samir Mehta


Petrea volubilis DSC05673.jpg
Petrea volubilis DSC05674.jpg
Petrea volubilis, close up @ BPT DSC07901.jpg
Petrea volubilis, close up @ BPT DSC07902.jpg
Petrea volubilis, leaf @ BPT DSC07899.jpg
Petrea volubilis, petiole @ BPT DSC07897.jpg
Petrea volubilis, raceme @ BPT DSC07900.jpg
Petrea volubilis, stipule @ BPT DSC07898.jpg
Petrea volubilis, sym @ BPT DSC07903.jpg
Petrea volubilis @ BPT DSC07904.jpg
Petrea volubilis @ BPT DSC07905.jpg

Gurcharan Singh

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Jul 10, 2011, 12:37:37 PM7/10/11
to Samir Mehta, efloraofindia
Samir ji
A nice series of photographs. Why don't you list down the differences (other than habit), if they look so different?. This will help in further investigation.


-- 
Dr. Gurcharan Singh
Retired  Associate Professor
SGTB Khalsa College, University of Delhi, Delhi-110007
Res: 932 Anand Kunj, Vikas Puri, New Delhi-110018.
Phone: 011-25518297  Mob: 9810359089
http://people.du.ac.in/~singhg45/ 

Samir Mehta

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Jul 10, 2011, 2:03:31 PM7/10/11
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Gulcharan ji, the difference of morphological structure I was
referring to relates to the difference in the width of the petals
(much broader in the second plant).

Further, not having any formal / structured education in Botany beyond
high school I am not sure what parameters botanists use in current
times to call a particular variation a sub-species or even a different
species.

Regards,

Samir





On Jul 10, 9:37 pm, Gurcharan Singh <singh...@gmail.com> wrote:
> Samir ji
> A nice series of photographs. Why don't you list down the differences (other
> than habit), if they look so different?. This will help in further
> investigation.
>
> --
> Dr. Gurcharan Singh
> Retired  Associate Professor
> SGTB Khalsa College, University of Delhi, Delhi-110007
> Res: 932 Anand Kunj, Vikas Puri, New Delhi-110018.
> Phone: 011-25518297  Mob: 9810359089http://people.du.ac.in/~singhg45/

Ushadi micromini

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Jul 10, 2011, 10:07:36 PM7/10/11
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Samir Ji and Gurucharanji , and all:

I have seen the same differences, in flowers of the vine..Petrea
volubilis and
the sp called arborea...

genetic differences are bound to show up...if the progeny of the
two repeats the vine-like Versus the shrub...

The shrub like petrea I saw was at a nursery owned and
run by a man who is the president of the NE indian Nursermen...
or some such organization....
I'll go back and photograph them again in details and
see if I can buy the two cuttings ..
.established in large pots...

MY QUESTION TO GURUCHARANJI: IS THERE ANY LAB THAT DOES
GENETIC ANALYSIS OF ORNAMENTALS?
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