Hoya parasitica complex species

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Images by Nidhan Singh (Id help by Prijith, Maggie & Surajit Koley) (Inserted by J.M.Garg) (For more images & complete details,
click on the links) 

 

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Hoya for id from Siliguri:: NS June 09 : 13 posts by 6 authors. Attachments (5).
This beautiful epiphyte was shot near Siliguri (W.B.)..
This is a Hoya sp. …H. verticillata ??

Please give your opinion regarding specific id..

Wow, great find …

Hoya alright since I photographed H. carnosa a few days ago here in California. Looks ver similar. Would be helpful if we know the differences.

Thanks for your early inputs …

I was considering this being one from H. verticillata or H. carnosa ..

tha pictures of the tiny flowers are so beautiful…they almost look artificial.

Hoya verticillata, acuta and parasitica are all quite difficult to differentiate. If there are references on the flora of Bengal, it could help

A reply from maker of World site on Hoyas:

“I sure looks like a species from the parasitica complex, but it’s extensive and flowers come in many colors (also growing condition affects the color) so it’s difficult to pin point exaclty which one”

Attached here KEY of three Hoya in ‘Bengal Plants’. Attachments (1).
Roxburgh’s note on Asclepias parasitica reads, “……. leaves opposite….. firm fleshy texture… veins scarcely conspicuous above, and invisible underneath, ….. petioles short, round, ash coloured, in fact more like a part of a branch….” But, Wight’s illustrations shows leaves are pinnately veined. I do not know if this is the same as Hoya parasitica Wall. ex Traill.
A website provides some information on Hoya – http://www.psthehoyan.com/. The author throws some light discussing H. parasitica, H. acuta and H. verticillata. According to him Hoya acuta does not have tri-nerved leaves. Also, Hoya verticillata does not have tri-nerved, quinquenerved, or palmately veined leaves (please note the graphics in http://www.psthehoyan.com/psthehoyan3_4.htm).
FoC has only one species with 3-veined leaves –
I hereby do not attempt to ID your plant. I send you this mail only because I have spent past two hours just to know what Hoya is! Whatever species it may turns out it is a heavenly (if there is any!) creation…. and excellent photographs as well.

Thank you very much for sharing this wonderful finding.

Pl. also see Hoya acuta

Herbarium sheet marked as Hoya verticillata (Vahl) G. Don can be found at KEW –

Can this Hoya be labelled as H. parasitica (Roxb.) Wall. ex Wt.?

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Hoya parasitica from Assam KD 03 Jul 2017 : 5 posts by 3 authors. Attachments (4)

Attached images are Hoya parasitica. The accepted name for the species are  Hoya parasitica (Roxb.) Wall. ex Traill synonym of Hoya verticillata (Vahl) G. Don(According to  India Biodiversity Portal) ,  Hoya parasitica Wall. ex Wight (According to Tropicos), Hoya parasitica (Roxb.) Wall. ex Wight(according to eFl of India),       Hoya parasitica Wall. ex J. Traill(According to Biodiversity Heritage library and The Plant list) and Hoya parasitica Wall. ( according to JSTOR Plant Science)and Hoya parasitica (Wall. ex Hornem.) Wight (according to  Kew world checklist of selected plant families). Now which is the correct Bot. name for Hoya parasitica.? 
Date :25.06.2017
Location: Assam
Family : Apocynaceae/Asclepiadaceae
Genus & species : Hoya parasitica
Habitat: Grows as epiphyete on tree
Habit : Epiphyte

To me appears to be same plant as in another thread: Hoya for id from Siliguri:: NS June 09 (still to be confirmed)

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Hoya verticillata: 2 high res. images.
Hoya verticillata
Behali Reserve Forest, Biswanath, Assam, India

Leaves look a bit different from those at POWO and Flora fauna web

Image from GBIF!

It is a very variable species, I am sure of this.

Pl. see the earlier discussion in the matter at Hoya for id from Siliguri:: NS June 09

for me its hoya parasitica

I went through the discussion and you are correct about the confusion. I was initially not sure where to place it because I have myself observed several variations of the flower colour and leaf characteristics in the safe forest growing in different tree trunks. I also communicated with Dr. Michele Rodda in 2018, regarding this, and he was with the same opinion. It should be better placed as H.verticillata? in eFI.
My photographs lack details, sorry for that. It might be among the varieties proposed within the species.
However, Attached is an article which might help.
1 pdf attachment