Buddleja montana is a species endemic to the rocky hillsides of the cordillera

Cordillera

A cordillera is an extensive chain of mountains or mountain ranges, that runs along a coastline . It comes from the Spanish word cordilla, which is a diminutive of cuerda, or "cord"...

s of Peru

Peru

Peru , officially the Republic of Peru , is a country in western South America. It is bordered on the north by Ecuador and Colombia, on the east by Brazil, on the southeast by Bolivia, on the south by Chile, and on the west by the Pacific Ocean....

 at altitudes of 2,700 - 4,000 m, extending into Bolivia

Bolivia

Bolivia officially known as Plurinational State of Bolivia , is a landlocked country in central South America. It is the poorest country in South America...

; it was named and described by Britton

Britton

-Places:* Britton, Ontario, Canada* Britton, Michigan, U.S.* Britton, South Dakota, U.S.-Surname:* Andrew Britton , British-born American author* Brent Britton , American lawyer...

 in 1898.

Description

B. montana 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 or small tree 2 - 8 m high, and is closely related to B. coriacea

Buddleja coriacea

Buddleja coriacea is endemic to much of Bolivia, growing in clearings, scrub, woodland edges, and along streams at elevations Buddleja coriacea is endemic to much of Bolivia, growing in clearings, scrub, woodland edges, and along streams at elevations Buddleja coriacea is endemic to much of...

. The young branches are subquadrangular and tomentose

Tomentum

Tomentum may refer to the following:*In botany, a covering of closely matted or fine hairs on plant leaves. *A network of minute blood vessels in the brain.* Tomentum in zoology are a short, soft pubescence...

, bearing coriaceous leaves 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...

 3 - 8 cm long by 0.5 - 1.5 cm wide, glabrescent

Glabrousness

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

 above and thickly tomentose below, with 0.4 - 0.7 cm petioles. The deep yellow to orange inflorescence is paniculate

Panicle

A panicle is a compound raceme, a loose, much-branched indeterminate inflorescence with pedicellate flowers attached along the secondary branches; in other words, a branched cluster of flowers in which the branches are racemes....

 with 1 - 2 orders of branches, 3 - 7 cm long by 2 - 6 cm wide, comprising small cymules; the corolla tubes 2.7 - 3.5 mm long.