The plant genus "Rauvolfia" Plum. Reserpine is one of dozens of indole alkaloids isolated from the plant "Rauvolfia serpentina". He conducted pioneering studies on herbal remedies including "Rauvolfia serpentina". Spegatrine is an adrenergic receptor antagonist isolated from "Rauvolfia verticillata". Rauvolfia vomitoria, the poison devil's-pepper, is a plant species in the genus "Rauvolfia". Prominent species include "Rauvolfia, Protorhus, Trichilia," and "Combretum," accompanied by aloes, fig, and Euphorbiaceae. Other indole alkaloids found in "Rauvolfia" include reserpine, ajmalicine, serpentine, corynanthine, and yohimbine. Rauvolfia caffra is a tree in the family Apocynaceae. It is a vinca alkaloid obtained from "Rauvolfia serpentina" and other species of "Rauvolfia". Rauvolfia mannii grows as a shrub or small tree up to tall. "Rauvolfia vomitoria" has been used across its range in traditional medicine. Steodnera calocasioides, Pinnaga gracilis, Rauvolfia serpentina, Mangifera sylvatica, Calamus guruba and Cyathea gigantean. Herbs include medicinal plants like "Rauvolfia serpentina", "Viala serpens", podophyllum, hexandrum and "Ephecra gerardiana". Asima Chatterjee initiated chemical investigation of alkaloids in "Rauvolfia tetraphylla" then known as "Rauwolfia canescens". "Rauvolfia vomitoria" is a small tree or large shrub, growing to high.