Sarcostemma acidum (nomen anno 1845 ab Ioachimo Ottone Voigt statutum) est species plantarum familiae Apocynacearum, in vallibus subtropicis sub montibus Himalayis sponte crescens. Nonnulli religioni Hinduicae haerentes sucum huius speciei ad soma conficiendum recipiunt, olim ex alia planta expressum.
J. O. Voigt, Hortus suburbanus Calcuttensis; A catalogue of the plants which have been cultivated in the Hon. East India Company's botanical garden, Calcutta, and in the Serampore botanical garden (Calcuttae: Bishop's College Press, 1845) p. 542
Rajesh Kochhar, "The Rgvedic Soma Plant" in ‘Medicine and Life Sciences in India (Novi Dellii, Centre for Studies in Civilization, 2001) pp. 724-739
Wendy Donovan O'Flaherty, "The Post-Vedic History of the Soma Plant" in Robert Gordon Wasson, ed., Soma: Divine Mushroom of Immortality (Novi Eboraci, 1968) pp. 95-147