Pereskia grandifolia (Rose Cactus; syn. Cactus grandifolius Link, Rhodocactus grandifolius (Haw.) F.M.Knuth, Cactus rosa Vell.) is a tree native to the Northeastern Brazil restingas.

This plant is often used as a medicinal plant and an ornamental plant. In addition, it has edible leaves.
Although it is a cactus by classification, it takes the form of a shrub or small tree, 2-5 meters high, with a grayish-brown trunk up to 20 cm in diameter. The areolees are rounded cushion-shaped grayish or brownish tomentum; on the twigs they are 3-7 mm diameter and up to 12 mm on the main trunk. The spines range from black to brown, the number at each areole gradually increasing with age; new twigs can have spineless areoles, while the trunk areoles may have up to 90 spines, each 2-6.5 cm long. The leaves vary in size from 9-23 cm long, entire, with shapes ranging from elliptic to ovate and obovate-lanceolate.
The dense inflorescence develops at the ends of stems, usually with 10-15 flowers, but sometimes with 30 or more. The flowers are showy and rose-like, 3-5 cm in diameter. (Ref. Wikipedia – 1.4.13) 




Pereskia grandiflora




11 Aug-2017 Plant id from chandigarh : 4 posts by 2 authors. Attachments (3)
Habit- small-medium sized tree, i found it quite unusual with leaves growing on fruit

Habitat- planted in Botanical Garden, Panjab University Chandigarh
Date- March 2016

Some Rutaceae member.    

Pereskia grandiflora