Habit : Twining climber
Root : Branched tap root system having nodules.
Stem : Aerial, weak stem and a twiner
Leaf : Imparipinnately compound, alternate, stipulate showing reticulate venation. Leaflets are stipellate. Petiolate and stipels are pulvinated.
Inflorescence : Solitary and axillary
Flower : Bracteate, bracteolate, bracteoles usually large, pedicellate, heterochlamydeous, complete, bisexual, pentamerous, zygomorphic and hypogynous.


Calyx : Sepals 5, synsepalous, green showing valvate aestivation. Odd sepal is anterior in position.
Corolla : Petals 5, white or blue apopetalous, irregular papilionaceous corolla showing descendingly imbricate aestivation.
Androecium : Stamens 10, diadelphous (9)+1 nine stamens fused to form a bundle and the tenth stamen is free. Anthers are dithecous, basifixed, introse and dehiscing by longitudinal slits.
Gynoecium : Monocarpellary, unilocular, with many ovules on marginal placentation, ovary superior, style simple and incurved with feathery stigma.
Fruit : Legume
Seed : Non-endospermous, reniform.

Role of Botanical Garden: 
Botanical Gardens play the following important roles.
1. Gardens have a wide range of species and supply taxonomic material for botanical research.
2. It can integrate information of diverse fields like Anatomy, Embryology, Phytochemistry, Cytology, Physiology and Ecology.
3. Act as a conservation centre for diversity, rare and endangered species.
4. It offers annual list of available species and a free exchange of seeds.
5. Botanical garden gives information about method of propagation, sale of plant material to the general public.

Polypetalae: Plants with free petals and dichlamydeous flowers come under polypetalae. It is further divided into three series - (iii) Calyciflorae: It includes plant having flowers with cup shaped thalamus and with inferior or sometimes with half inferior ovary. It includes 5 orders and 27 families.

(i) It is a method to identify genetic markers using a randomly synthesized primer that will anneal (recombine (DNA) in the double stranded form) to complementary regions located in various locations of isolated DNA. If another complementary site is present on the opposing DNA strand at a distance that is not too great then the reaction will amplify this region of DNA.
(ii) RAPDs (Random Amplified Polymorphic DNA) like microsatellites may often be used for genetic studies within species but may also be successfully employed in phylogenetic studies to address relationships within a species or between closely related species.