Hybanthus enneaspermus (L.) F.Muell. - Hybanthus enneaspermis is a variable species; the leaves are highily variable from ovate to linear; margin entire to serrate. 

Images by tspkumar

Botanika – Steciana A synopsis of Violaceae in the Indian subcontinent: its distribution and endemism- Botanika – Steciana 11, 2007, 3-8 by Subir Ranjan Kundu
(Abstract. A preliminary checklist of Violaceae in the Indian subcontinent has been prepared on the basis of primary observations of different taxa belonging to this family in wild habitats and on secondary observations based on examining herbarium specimens and taxonomic literature. On the Indian subcontinent (comprising Bangladesh, Bhutan, Myanmar, Nepal, Pakistan, Sri Lanka and India), the family Violaceaeee is poorly represented (6.44%). The present paper deals with distribution, phytoendemism, potential, survival threat on existing taxa etc. of Violaceae in the Indian subcontinent. For better understanding of the species dynamics of Violaceae in the Indian subcontinent, the present status of phytoendemism has been compared to the data of previous investigations done in the nineteenth century.)
Species, genera & family pages of‎‎‎ Violaceae are now with images. I request you to pl. go through & point out mistakes, if any. I hope this will aid in identifications in future.