Drummond's Goldenweed, Drummond's Goldenbush

Isocoma drummondii (Torr. & A. Gray) Greene

Asteraceae (Sunflower Family)


Drummond’s Goldenweed are native, warm-season, perennial subshrubs with woody taproots.    The leaves of Drummond’s Goldenweed are seldom lobed and may have only a few prominent teeth on the leaf margins. Leaf blades are narrow, oblong to oblanceolate, typically have entire margins, and range from 0.5 to 2 inches or 13 to 50 mm long. Phyllary apices are typically green and evidently gland-dotted. Vegetation is glabrous or smooth, not resinous.    Leaf-like bracts (i.e., involucres) occur below the flower heads of both species. The bracts of Drummond’s Goldenweed are commonly 5.5-8 by 4.5-7 mm long.    Each species has a round-topped mass of flowering heads. The flowering heads are yellow to orange. The plants have no ray or showy flowers, only disk flowers. Drummond’s Goldenweed blooms from May to July.  


Drummonds Goldenweed occurs in the coastal half of South Texas on various soil types; it is considered a more aggressive weedy species. Habitats include beach dunes, prairies, brushlands, and scrub woodlands.