Shaggy button weed (Spermacoce hispida), of the Rubiaceae family. Prostrate or straggling hispid annual herb with whorled clusters of small flowers set at the nodes; native range: a prostrate weed of dry open ground, roadside and fallow across India and tropical Asia. Globally recognized as vasuka in Sanskrit, nathaichoori in Tamil, and shaggy button weed in English. The part used is root.

In this cross-tradition database, we analyze how this substance operates across world medicine systems — tracking its traditional tastes, temperatures, tissue affinities, post-digestive effects, and planetary correspondences across Ayurveda, Unani, and Western herbalism.

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