Vincetoxicum canescens ABMAY01/2018

[Ashwini Bhatia]

I found this milkweed near home this time. I had photographed it earlier and posted to the group here. 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 

[J.M. Garg]

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

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[J.M. Garg]

Thanks, Ashwini ji, 

I will look into it in due course. 

On Tue 1 May, 2018, 8:24 PM Ashwini Bhatia, <ash...@ashwinibhatia.com> wrote:

Thank you Mr Garg. Please check the photos on the site and make a decision with experts whether to change the ID there.

Regards,

Ashwini

[J.M. Garg]

Thanks, Ashwini ji,

I agree with you for Vincetoxicum canescens as per keys, details and photographs at

http://www.efloras.org/florataxon.aspx?flora_id=5&taxon_id=134602

http://naturewonders.org/picture?/498

https://www.turkiyebitkileri.com/tr/component/datsogallery/view-album/643.html

http://dogalhayat.org/turler/vincetoxicum-canescens-subsp-canescens-zilasur/

Looks different from Vincetoxicum hirundinaria as per

https://groups.google.com/forum/?hl=en&fromgroups#!topic/indiantreepix/NrPWotHzelw

https://en.wikipedia.org/wiki/Vincetoxicum_hirundinaria

http://www.luontoportti.com/suomi/en/kukkakasvit/swallow-wort

http://eol.org/pages/488017/overview

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With regards,
J.M.Garg

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[J.M. Garg]

Taking it as Vincetoxicum kenouriense (Wight) Wight, Icon. Pl. Ind. Orient., pl. 1614. 1850 (syn: Cynanchum kenouriense Wight, Contr. Bot. India 58. 1834.) as per Taxonomy of Vincetoxicum s.str. (Asclepiadoideae, Apocynaceae) from southern Asia including three new species and resurrected names-  Sayed Afzal Shah, Amir Sultan, Jun Wen, Zahid Ullah, Surat Un Nisa, Zhumei Ren, Muhammad Maqsood Alam, Javed Iqbal, Abdul Samad Mumtaz - June 2021PhytoKeys 179(1):35-73

It states "Corolla tube ca. 1 mm long, lobes oblong with obtuse apices, 3–3.5 × 1–2 mm, glabrous within or sparse caducous trichomes present"

Thanks to the authors for solving the puzzle.

---------- Forwarded message ---------
From: Ashwini Bhatia <ash...@ashwinibhatia.com>
Date: Tue, 1 May 2018 at 16:18
Subject: [efloraofindia:293924] Vincetoxicum canescens ABMAY01/2018
To: efloraofindia <indian...@googlegroups.com>

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With regards,
J.M.Garg

[Gurcharan Singh]

Yes Garg ji

[J.M. Garg]

Thanks, Singh ji

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[gurinder goraya]

Amazing pics Ashwini. So clear... makes taxonomy easier! 

Regards,

Dr. G S Goraya, IFS (Retd.)

735-B, Joginder Vihar, Army Flats, Phase-2 (Sector-54),

SAS Nagar, Mohali - 160 055 (Punjab)

Tel. (Mob.) +91-941-802-5036

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From: indian...@googlegroups.com <indian...@googlegroups.com> on behalf of J.M. Garg <jmg...@gmail.com>
Sent: Saturday, September 3, 2022 3:06 PM
To: efloraofindia <indian...@googlegroups.com>
Cc: Ashwini Bhatia <ash...@ashwinibhatia.com>; Nidhan Singh <nidhans...@gmail.com>; Saroj Kasaju <kasaj...@gmail.com>; Balkar Arya <balka...@gmail.com>
Subject: Fwd: [efloraofindia:431904] Vincetoxicum canescens ABMAY01/2018

 

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[J.M. Garg]

Hi, Gurinder ji,
We have been missing you for your deep insights into Himalayan Flora. 

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With regards,
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