About Buddleja tucumanensis Griseb.
Species Naming and Growth Form
Buddleja tucumanensis Griseb. is a dioecious shrub that reaches 0.5 to 5 meters in height, and has grey fissured bark.
Young Branch Characteristics
Its young branches are terete and covered in tomentum.
Lower Leaf Petioles and Blades
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 Leaf Texture and Margins
Lower leaves are subcoriaceous, becoming glabrescent on the upper surface and tomentose or lanose on the lower surface, with serrated margins.
Upper Leaf Features
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.
Inflorescence Structure
The yellowish-orange, leafy inflorescences are made up of hemispheric heads that grow in the axils of terminal leaves.
Inflorescence Head Details
There are 5 – 20 heads per branch, each head 1 – 1.5 cm in diameter and holding 5 – 20 flowers.
Corolla Size
The corollas measure 3.5 – 5 mm long.
Ploidy
This species has a ploidy of 2n = 38.
Cultivation Status
Buddleja tucumanensis is not known to be cultivated anywhere outside of Argentina.
