About Buddleja tucumanensis Griseb.
Buddleja tucumanensis Griseb. is a dioecious shrub that reaches 0.5 to 5 meters in height, and has grey fissured bark. Its young branches are terete and covered in tomentum. Lower leaves have petioles less than 2 centimeters long, with leaf blades ranging from oblong to ovate in shape, measuring 8 – 15 cm long by 2.5 – 5.5 cm wide. Lower leaves are subcoriaceous, becoming glabrescent on the upper surface and tomentose or lanose on the lower surface, with serrated margins. Upper leaves have shorter petioles, with leaf blades ranging from lanceolate to elliptic in shape, measuring 3 – 11 cm long by 1 – 4 cm wide, with entire margins. The yellowish-orange, leafy inflorescences are made up of hemispheric heads that grow in the axils of terminal leaves. There are 5 – 20 heads per branch, each head 1 – 1.5 cm in diameter and holding 5 – 20 flowers. The corollas measure 3.5 – 5 mm long. This species has a ploidy of 2n = 38. Buddleja tucumanensis is not known to be cultivated anywhere outside of Argentina.
