Soma and the Plant

An entire mandala of the Rig Veda — the ninth, with 114 hymns — is given over to Soma. Outside Mandala 9, Soma is invoked everywhere. He is the drink of the rite and a god in his own right, the energiser of Indra before the battle with Vrtra, the stimulant of poetic vision, and — the hymns are explicit about this — a substance with a distinctive method of preparation, a specific source, and an observable mental effect.

The procedure is described, in fragments, over hundreds of verses: stalks gathered from mountains; pressed between stones; the juice filtered through wool; mixed with milk or water or honey; offered to the fire; the remainder drunk by the priests. The hymns describe the experience that follows: we have drunk Soma, we have become immortal, we have reached the light (Mandala 8); the senses sharpening, the mind expanding, the language flowing. There is no mistaking the claim. The Rig Veda’s central rite is an entheogenic one — the controlled use of a psychoactive plant preparation for religious purpose — and the text is plain about it.

The unsolved scientific question is: what plant was soma? The hymns describe it as a stalk, growing in mountains, harvested at night under the moon. The Iranian cousins of the Vedic priests used a corresponding preparation, haoma, with strikingly similar ritual — confirming an Indo-Iranian inheritance — and modern Zoroastrian practice uses ephedra. That has made Ephedra the longest-standing candidate. Its alkaloids (ephedrine, pseudoephedrine) match the descriptions of alertness and vigor; it grows in the high mountains the hymns reference; it has the stalky non-leafy morphology the texts seem to describe.

Two other candidates have been seriously proposed. The mushroom Amanita muscaria (the red-and-white fly agaric) was argued for famously by R.G. Wasson, citing the texts’ descriptions of golden-yellow filtered juice and the absence of leaf-references; it has been criticised because the mushroom does not match the stalk and mountain descriptions well, and because Vedic ritual culture does not show other fungal traces. Peganum harmala (Syrian rue), which contains MAOI alkaloids (harmine, harmaline), has been proposed by some Iranists for haoma and by extension for soma; the harmine connection is suggestive but the botanical fit to the Vedic descriptions is partial.

The honest answer is that botany has not closed the case. The likeliest candidate remains ephedra; the second likeliest is some now-extinct or regionally-lost relative; alternatives are possible. What is not in doubt is that the plant existed, was used carefully, was prepared as the hymns describe, and produced effects significant enough that an entire mandala of one of the world’s oldest scriptures is given to praising it.

Reading the Soma cycle scientifically, the most striking thing is the precision of method. The text records the order of operations, implements, sounds, and timings. This is, in a real sense, the earliest Indian pharmacology — a documented procedure for extracting a bioactive preparation from a botanical source, with an observed and characterised psychoactive effect, embedded in a ritual context that controlled dose and setting. That is not folk magic. That is what early empirical practice looks like, before there is anywhere else for empirical practice to live.

Mandala 9’s hymns are also among the most lyrically beautiful in the text. Read them with that in mind: a culture singing to the substance it believed gave it the words to sing at all. Soma is praised as the source of inspired speech, and the Vedic poets — who knew what their work required — were thanking it.

The next chapter is the gods every Vedic morning began with: Surya the sun and Ushas the dawn.