apocynaceae. The taxonomic name is plumeria rubra.

The name would be Aspidosperma spp. Family: Apocynaceae.

The name would be Dyera costulata. Family: Apocynaceae. (endangered)

The Apocynaceae family, to which Rauvolfia belongs, is characterized by the presence of milky sap and opposite leaves. The flowers are usually regular and tubular with five petals. The fruits are typically follicles or berries. Members of this family often contain alkaloids with medicinal properties.

Chandni is a shrub not tree. Its botanical name is Tabernum montana. It belongs to family Apocynaceae.