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Summary

Argythamnia is a genus of flowering plants of the family Euphorbiaceae. They are known commonly as silverbushes. The genus includes 66 species native to the Americas, ranging from the southwestern and south-central United States through Mexico, Central America, the Caribbean, and South America to southern Argentina.
The genus was described by Patrick Browne in 1756.

Species

66 species are accepted as of May 2026. There have been many changes in classification the past several years.

Argythamnia acaulis (Herter) J.W.Ingram Argythamnia acutangula Croizat – Colombia Argythamnia adenophora A.Gray Argythamnia alcalina J.Külkamp Argythamnia aphoroides Müll.Arg. Argythamnia argentea Millsp. – South Caicos Argythamnia argothamnoides (Bertol. ex Spreng.) J.W.Ingram Argythamnia argyaea Cory – Texas Argythamnia arlynniana J.W.Ingram Argythamnia brandegeei Millsp. Argythamnia breviramea Müll.Arg. Argythamnia calycina Müll.Arg. Argythamnia candicans Sw. – West Indies Argythamnia claryana Jeps. Argythamnia coatepensis (Brandegee) Croizat – Veracruz and Puebla Argythamnia cubensis Britton & P.Wilson – Cuba Argythamnia cuneifolia (Pax & K.Hoffm.) J.W.Ingram Argythamnia cyanophylla (Wooton & Standl.) J.W.Ingram Argythamnia depressa (Greenm.) J.W.Ingram Argythamnia desertorum Müll.Arg. Argythamnia dioica (Kunth) Müll.Arg. Argythamnia ecdyomena J.W.Ingram – Alta Verapaz Argythamnia erubescens J.R.Johnst. Argythamnia estacionalis M.M.Ornelas & J.Külkamp Argythamnia fasciculata (Vahl ex A.Juss.) Müll.Arg. Argythamnia grazielae (J.Külkamp) J.Külkamp & Riina Argythamnia guatemalensis Müll.Arg. Argythamnia haitiensis (Urb.) J.W.Ingram Argythamnia haplostigma Pax & K.Hoffm. – Roatán Argythamnia heterantha (Zucc.) Müll.Arg. Argythamnia heteropilosa J.W.Ingram – Cuba Argythamnia humilis (Engelm. & A.Gray) Müll.Arg. Argythamnia illimaniensis Müll.Arg. Argythamnia ingramii Ram.-Amezcua & V.W.Steinm. Argythamnia jablonszkyana (Pax...