B. metallica W.G. Smith is a Brazilian species first described in Floral Magazine in London in 1876. The earliest hybrid of record of this species was B. ‘Margaritae’ was done in France prior to 1882; this cross was a hybrid with B. echinosepala.
This shrub‑like species has sturdy, but thin, erect stems. The leaves have been described variously as “iridescent and embossed silk” (Alice Clark) and “having the shininess of polished metal”. Mature leaves are dark green with red veins underneath. New leaves are bright red both top and bottom. White hairs are sparse on top of the leaves and heavier underneath.
Flowers, which appear in summer and fall are pink with darker pink, almost red hairs; male flowers dominate. It is a moderate bloomer, but has large clusters of flowers.