Images by Ranjini Kamath & Shubhada Nikharge (Identified by J.M.Garg) (Inserted by J.M.Garg)

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Rubber vine, Madagascar rubbervine;
 


Flowering plant for ID – 23/09/12 – RK:  Request ID of this plant. Looks like shrub – but could be a creeper. About 4′ high. Pics taken in Lalbagh, Bangalore on 12/08/12 at 9.30 am.


Looks like Cryptostegia grandiflora.


Yes, … you are right

Cryptostegia grandiflora R. Br., Periplocaceae


I think it should be Cryptostegia madagascariensis as per differences given in Factsheet as below:
Rubber vine (Cryptostegia grandiflora) is very similar to a closely related species that is known as purple rubber vine (Cryptostegia madagascariensis ). It is also relatively similar to the garden plant known as purple allamanda (Allamanda blanchetii). These species can be distinguished by the following differences:
  • rubber vine (Cryptostegia grandiflora) has oppositely arranged leaves with slightly reddish or purplish-coloured stalks (i.e. petioles) and midribs. Its younger branches and leaves are always hairless (i.e. glabrous), its flowers are usually pale pink in colour with a much deeper coloured throat, and its paired fruit are commonly each more than 10 cm long.
  • purple rubber vine (Cryptostegia madagascariensis ) has oppositely arranged leaves with yellowish-green coloured stalks (i.e. petioles) and midribs. Its younger branches and leaves may sometimes be slightly hairy (i.e. puberulent), its flowers are usually uniformly bright pink or purplish in colour, and its paired fruit are always each less than 10 cm long.
  • purple allamanda (Allamanda blanchetii) has its leaves arranged in whorls of three or more along its stems (i.e. they are verticillate). Its younger stems and leaves are somewhat hairy (i.e. pubescent), its flowers are usually uniformly bright pink or purplish in colour, and its rounded fruit are rarely seen. 


 

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unid plant – 2010_06_Tadgaum_SSN : 11 posts by 7 authors. Attachments (8) 

Request id of this plant
I saw this plant in the last week of June 2010 in Tadgaum, Gujrat
Habitat-  Urban
Plant Habit- It was a scandent shrub.  
Height – 15 ft.
The plant had latex.

i have attached the pics of leaves, bark, twigs, flowers and fruits.


I have seen this flowers many years back but don’t remember the name exactly , I hope this is
Cryptostegia grandiflora, commonly known as Rubber Vine, is a woody-perennial vine that is native to south-west Madagascar. It is also a significant weed in northern Australia, sometimes regarded in fact, as the worst weed in all of Australia. It has also been introduced to most other tropical and subtropical regions by man, because of its attractive flowers and the fact that its latex contains commercial quality rubber (hence the name). It is now naturalised in the Caribbean, East Africa, Mauritius, India, Southeast Asia, Latin America, the southern United States, Fiji and New Caledonia.


Nice photographs of Cryptostegia grandiflora.


Cryptostegia grandiflora, from what I have seen is creamish rose… see the flower in Isaac’s and Inglehalikar’s books. This flower is very different colour. 


Agreed, but would presume colour variations of flowers is acceptable. Sending you my photographs. They were taken at Bhigwan. Attachments (2)


Agree.


Affirmative from my side too…


Cryptostegia grandiflora


I think it should be Cryptostegia madagascariensis as per differences given in Factsheet as below:
Rubber vine (Cryptostegia grandiflora) is very similar to a closely related species that is known as purple rubber vine (Cryptostegia madagascariensis ). It is also relatively similar to the garden plant known as purple allamanda (Allamanda blanchetii). These species can be distinguished by the following differences:
  • rubber vine (Cryptostegia grandiflora) has oppositely arranged leaves with slightly reddish or purplish-coloured stalks (i.e. petioles) and midribs. Its younger branches and leaves are always hairless (i.e. glabrous), its flowers are usually pale pink in colour with a much deeper coloured throat, and its paired fruit are commonly each more than 10 cm long.
  • purple rubber vine (Cryptostegia madagascariensis ) has oppositely arranged leaves with yellowish-green coloured stalks (i.e. petioles) and midribs. Its younger branches and leaves may sometimes be slightly hairy (i.e. puberulent), its flowers are usually uniformly bright pink or purplish in colour, and its paired fruit are always each less than 10 cm long.
  • purple allamanda (Allamanda blanchetii) has its leaves arranged in whorls of three or more along its stems (i.e. they are verticillate). Its younger stems and leaves are somewhat hairy (i.e. pubescent), its flowers are usually uniformly bright pink or purplish in colour, and its rounded fruit are rarely seen.
     

It is Cryptostegia grandiflora


Thanks, … But the keys at Factsheet go against Cryptostegia grandiflora


References:

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