I would urge Shrikant ji to have another look at this flower. In
Ipomoea obscura, the corolla tube is supposed to be bell-shaped which
open into an almost flat flower. The flower is usually white with
yellowish nectar guides. There is a distinct purple or brown in the
throat. Garg ji flower shows all these features. The purple, which
would have been visible in the throat in a front view, is visible at
the base of the flower tube. Also, in Garg ji's pictures, flowers are
mostly single, on long peduncles, and comparatively short flower-
Merremia umbellata flowers are borne in tight umbel-like clusters, see
a pic below:
The flowers in Garg ji's pictures are not in a tight umbel. There is
no purple or brown in the throat of Merremia umbellata flowers.
Lastly, the corolla of Merremia umbellata is slightly lobed. Garg ji's
flowers are not lobed.
Thus I believe this should be Ipomoea obscura.
On Oct 30, 1:28 pm, "J.M. Garg" <jmga...@gmail.com
> A reply from Shrikant ji:
> "Dear Mr. Garg,
> Your recent posting on the subject plant has corolla with bell shape and
> bands on corolla lobes are not clearly defined, so it would be *Merremia*.
> With axillary umbellate cymes this plant would be *M. umbellata*.
> *I. obscura* would have had wheel shaped corolla and bands on corolla lobes
> would be clearly defined. ( FOS wrongly metions corolla to be 'funnel
> shaped', it should have been wheel shaped). Regards
> 2009/10/30 J.M. Garg <jmga...@gmail.com
> > In Sanjeevaiah Park, Hyderabad on 1/8/09.
> > --
> > With regards,
> > J.M.Garg (jmga...@gmail.com
> J.M.Garg (jmga...@gmail.com