G. dumbsa. is a branching bush 1 to 5 feet high, with creeping base and hairy, glandular stems. Flowers, 5 in a cluster, in June. Corolla, large, waxy white, sometimes tinged with pink. Anthers, brown, divided nearly to their base, on white filaments. Shrub, resinous-dotted. The round, black fruit is rather insipid.