Swainsona is a large genus of flowering plants native to Australasia. There are 85 species, all but one of which are endemic to Australia. A member of the family Fabaceae (legumes), it is most closely related to the New Zealand genera Montigena (scree pea), Clianthus (kakabeak), and Carmichaelia (New Zealand broom). Swainsona is named after English botanist Isaac Swainson. A few species are known to produce swainsonine, a phytotoxin harmful to livestock (see Locoweed). In Australia, animals intoxicated with swainsonine are said to be pea struck. Selected species Swainsona acuticarinata (A.T.Lee) Joy Thomps. Swainsona adenophylla J.M.Black Swainsona affinis (A.T.Lee) Joy Thomps. Swainsona beasleyana F.Muell. Swainsona behriana F.Muell. ex J.M.Black Swainsona brachycarpa Benth. Swainsona bracteata (Maiden & Betche) Joy Thomps. Swainsona burkei F.Muell. ex Benth. Swainsona burkittii F.Muell. ex Benth. Swainsona cadellii F.Muell. ex C.Moore & Betche Swainsona calcicola Joy Thomps. Swainsona campestris J.M.Black Swainsona campylantha F.Muell. Swainsona canescens (Benth.) F.Muell. Swainsona colutoides F.Muell. Swainsona complanata Joy Thomps. Swainsona concinna F.M.Bailey Swainsona cornuta Joy Thomps. Swainsona coronillifolia Salisb. Swainsona cyclocarpa F.Muell. Swainsona decurrens A.T.Lee Swainsona dictyocarpa J.M.Black Swainsona disjuncta Joy Thomps. Swainsona ecallosa Sprague Swainsona elegans A.T.Lee Swainsona elegantoides (A.T.Lee) Joy Thomps. Swainsona eremaea Joy Thomps. Swainsona extrajacens Joy Thomps. Swainsona fissimontana J.M.Black Swainsona flavicarinata J.M.Black Swainsona formosa (G. Don) Joy Thomps. – Sturt's Desert Pea Swainsona forrestii F.Muell. ex A.T.Lee Swainsona fragilis F.M.Bailey Swainsona fraseri Benth. Swainsona fuscoviridis Joy Thomps. Swainsona galegifolia (Andrews) R.Br. Swainsona gracilis Benth. Swainsona greyana Lindl. Swainsona halophila Joy Thomps. Swainsona incei W.R.Price Swainsona kingii F.Muell. Swainsona lessertiifolia DC. Swainsona monticola A.Cunn. ex Benth. Swainsona procumbens (F.Muell.) F.Muell. Swainsona sejuncta Joy Thomps. Swainsona stenodonta References Flora of Australasia Fabaceae genera