Thanks, Ashwini ji, for detailed analysis and superb images.

On Tue 1 May, 2018, 4:18 PM Ashwini Bhatia, <[email protected]>
wrote:

> I found this milkweed near home this time. I had photographed it earlier
> and posted to the group here
> <https://groups.google.com/forum/#!topic/indiantreepix/YcoeqqC_hcA>.
> Revisiting the ID, I found it to be *not V. hirundinaria* as the
> description in Flowers of the Himalaya states: '*Corolla c. 5mm across,
> with nearly hairless triangular lobes*' and '*calyx-lobes triangular,
> nearly as long as corolla*' for *V. hirundinria*.
>
> The plants here have hair on the inside of corolla lobes and calyx is much
> shorter than the corolla. The description matches more closely to the 
> *Cynanchum
> glaucum* in Flora Simlensis: '*Calyx about half as long as the corolla.
> Corolla hairy on the inner surface.*'
>
> Tibetan Medicinal Plant treats *C. glaucum* (*V. glaucum*) as a synonym
> of V. canescens and describes it as:
>
> '*Corolla yellow or green fading to greenish orange; tube approximately
> 1mm; lobes ovate, 2-3 x 1.5 mm, hairless outside, sparsely hirsute inside;
> sepals less than 1mm*.'
>
> But the authors treat it as part of the larger *V. hirundinaria* group
> perhaps because medicinal properties are similar.
>
> FOP says: '*Perennial undershrub, c. 15-70 cm tall, erect to twining,
> pubescent. Leaves 4-7 cm x 1.8-6 cm, ovate-lanceolate or cordate, glabrous
> to pubescent, entire, acute to acuminate. Flowers clustered in the leaf
> axils. Pedicels 4-5 mm long. Calyx lobes c. 1.5 mm long, lobes oblong to
> lanceolate, acute. Corolla c. 4 mm long, cream to greenish, lobes hairy on
> the inner surface. Corona lobes 5, obtuse. Follicles 5-6 x 1-1.5 (-2) cm,
> gradually tapering towards the tip.*
>
> *Fl. Per.: June-September.*'
>
> I made some measurements too:
>
> Plants 40-80cm tall, pubescent. Leaves c. 5cm x 7cm, bottom ones smaller
> and blunt-tipped, hairy on the nerves underneath and on the edges. Flowers
> greenish-yellow c. 1cm across, 5-7 petals (lobes), smooth outside but hairy
> on the inside; sepals narrow c. 1.5-2mm each. Pedicels 4-5mm.
>
> And since the plants are flowering at the moment, I can say Late-April is
> more correct than June.
>
> Considering the above information, *I would like to think that the plants
> here (and on our site) are V. canescens.* Please advise.
>
>
> *Vincetoxicum canescens*
>
> Near Dal Lake, Dharamshala, HP
>
> 1800m approx.
>
> 30 April 2018
>
>
>
> Thanks.
>
> Ashwini
>
>
>
>
>
>
>
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