I think Dinesh has put it correctly:
1. Photo posted by Janaki is Field Bindweed (Convolvulus arvensis)
2. Photos posted by Garg ji are NOT Field Bindweed - most likely they
are of Ipomoea marginata
Although the leaves look very similar, the flower shape of the two is
different, if viewed from the side. I. marginata has funnel shaped
flowers with long, narrow "neck" of the funnel. Field Bindweed flowers
are more like cones, with almost no narrow tube above the sepals.
Also, the pink-white striping is typical in some forms of Field
Bindweed, although there are pure white forms also.
On Mar 23, 9:35 pm, Dinesh Valke <dinesh.va...@gmail.com
> ... yes, Garg ji ... that's what I believe ... not being adamant about it,
> however :)
> I would want at least some friend(s) to validate that there is indeed
> difference in flowers (of Janaki ji's and Garg ji's)
> and of course best if someone also considers the plant in your photo
> to be *Ipomoea
> marginata* (syn. *Ipomoea sepiaria*, *Convolvulus marginatus*).
> I see your flowers matching what I have athttp://www.flickr.com/search/?w=91314344@N00&q=Ipomoea+marginata&m=text
> Here is the fine and bold print: *I may be wrong*.
> On Mon, Mar 23, 2009 at 9:45 PM, J.M. Garg <jmga...@gmail.com
> > Hi, Dinesh ji,
> > Do you mean to say that my attached pictures are not of *C. arvensis?*
> > 2009/3/23 Dinesh Valke <dinesh.va...@gmail.com
> > APOLOGIES !!! (Ken ji, Garg ji, and to all)
> >> Photo posted by Janaki ji could be *C. arvensis* just as Ken ji and Garg
> >> ji pointed out.
> >> I mistook the photo attachments in Garg ji's post to be of Janaki ji's.
> >> My earlier posted message in this thread referred to Garg ji's attached
> >> photos ... I see them as different flowers.
> >> Regards.
> >> On Mon, Mar 23, 2009 at 11:12 AM, Kenneth Greby <fstf...@yahoo.com
> >>> Greetings all--
> >>> I am by no means an expert in this family, and I am not familiar with
> >>> the technical differences between the species discussed.
> >>> My chief experience with Convovulus arvanesis is as an extremely
> >>> pernicious weed in Southern California (USA). It is perhaps the most
> >>> difficult to control of landscape weeds there, particularly in groundcover
> >>> beds. It develops a strongly-branched root system and is very resistant to
> >>> most commercially-available herbicides. As such, I cannot recommend it as a
> >>> landscape plant; enjoy it from a distance!
> >>> Regards--
> >>> Ken Greby.
> >>> --- On *Mon, 3/23/09, Dinesh Valke <dinesh.va...@gmail.com
> >>> ... now there is some confusion in my mind ... I have come to believe *Ipomoea
> >>> marginata* to be what I have here:
> >>> 1) what I have been considering as *I. marginata* is supposed to be *C.
> >>> arvensis*
> >>> 2) *I. marginata* and *C. arvensis *are very similar and easily
> >>> confused.
> >>> The distribution of *C. arvensis *put at NPGS / GRIN, especially where
> >>> it is native to, are countries in temperate regions.
> >>> Image results that show hastate leaves of *C. arvensis* seem to
> >>> have a kind of bulge in the centre before narrowing to apex.
> >>> What I see as *I. marginata*, have its young leaves hastate and the
> >>> older ones cordate.
> >>> I am eager to know where the confusion is.
> >>> Regards.
> >>> On Mon, Mar 23, 2009 at 9:00 AM, Saurabh Sawant <
> >>> mastermind....@gmail.com
> >>>> This is **Convolvulaceae. Ipomoea marginata and Convolvulus marginatus
> >>>> are same. And I still think this is Convolvulus marginatus.
> >>>> Regards,
> >>>> Saurabh
> >>>> On Mon, Mar 23, 2009 at 8:27 AM, J.M. Garg <jmga...@gmail.com
> >>>>> Hi, Janaki ji,
> >>>>> I agree with Ken ji.
> >>>>> I think it's Field Bindweed (*Convolvulus arvensis*). Attached my
> >>>>> pictures here.
> >>>>> See from earlier post on it from Indiantreepix Database:
> >>>>> *Convolvulus arvensis* *Convolvulaceae* *Field Bindweed* On
> >>>>> 20/7/08 around agricultural fields at Agriculture University in Hyderabad,
> >>>>> AP.
> >>>>> Convolvulus arvensis - Wikipedia, the free encyclopedia<http://en.wikipedia.org/wiki/Convolvulus_arvensis
> >>>>> convolvulata - indiantreepix | Google Groups<http://groups.google.com/group/indiantreepix/browse_thread/thread/01b..
> >>>>> 2009/3/22 Saurabh Sawant <mastermind....@gmail.com
> >>>>>> **Ipomoea marginata