Black-eyed Susan  |  

Black-eyed Susan is a low shrub that grows in clumps of single or multiple stems arising from a single rootstock. Stems are up to 1 m long, hairless with minute tubercles, and with two or three narrow wings that give them an angular appearance. The distinctly angular, winged structure distinguishes Black-eyed Susan from other members of the Tetratheca genus. Juvenile plants have alternate narrow lanceolate leaves. Mature plants are usually leafless but if leaves are present they are alternate, hairless, usually reduced to narrow triangular scales up to 3 mm long, or otherwise narrow-elliptic to 20 mm long and approximately 5 mm wide with flat or recurved margins.