Buddleja oblonga is a species endemic to the Serra do Caparaó and south as far as Paraná

Paraná (state)

Paraná is one of the states of Brazil, located in the South of the country, bordered on the north by São Paulo state, on the east by the Atlantic Ocean, on the south by Santa Catarina state and the Misiones Province of Argentina, and on the west by Mato Grosso do Sul and the republic of Paraguay,...

 in Brazil

Brazil

Brazil , officially the Federative Republic of Brazil , is the largest country in South America. It is the world's fifth largest country, both by geographical area and by population with over 192 million people...

, where it grows in fields and damp thickets near streams at altitudes of 1,000 - 2,200 m. The species was first named and described by Bentham

George Bentham

George Bentham CMG FRS was an English botanist, characterized by Duane Isely as "the premier systematic botanist of the nineteenth century".- Formative years :...

 in 1846.

Description

B. oblonga is a dioecious

Dioecious

Dioecy is the property of a group of biological organisms that have males and females, but not members that have organs of both sexes at the same time. I.e., those whose individual members can usually produce only one type of gamete; each individual organism is thus distinctly female or male...

 shrub

Shrub

A shrub or bush is distinguished from a tree by its multiple stems and shorter height, usually under 5–6 m tall. A large number of plants may become either shrubs or trees, depending on the growing conditions they experience...

 with dark-brown longitudinally fissured bark. The young branches are quadrangular, bearing sessile

Sessility (botany)

In botany, sessility is a characteristic of plants whose flowers or leaves are borne directly from the stem or peduncle, and thus lack a petiole or pedicel...

 oblong to elliptic

Leaf shape

In botany, leaf shape is characterised with the following terms :* Acicular : Slender and pointed, needle-like* Acuminate : Tapering to a long point...

 membranaceous leaves 6 - 15 cm long by 0.8 - 3 cm wide, glabrous

Glabrousness

Glabrousness is the technical term for an anatomically atypical lack of hair, down, or similar structures...

 above and glabrescent

Glabrousness

Glabrousness is the technical term for an anatomically atypical lack of hair, down, or similar structures...

 below. The white inflorescence

Inflorescence

An inflorescence is a group or cluster of flowers arranged on a stem that is composed of a main branch or a complicated arrangement of branches. Strictly, it is the part of the shoot of seed plants where flowers are formed and which is accordingly modified...

s are 4 - 10 cm long, comprising 4 - 8 heads in the axils of the reduced terminal leaves, the heads 0.7 - 1.5 cm in diameter, with 5 - 9 flowers; the corollas 4.5 - 5.5 mm long.