Euphorbiaceae Fortnight: Euphorbia ‘Black Bird’ from California-GS-14 : Attachments (2). 2 posts by 2 authors. Euphorbia ‘Black Bird’ known as cushion spurge is an evergreen perennial with bushy growth and dark purple velvety leaves, producing yellow cyathis subsequently. Photographed from a nursery in Sunnyvale, California
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