Buddleja chapalana is a rare species endemic to the rocky cliffs bordering the northern and western shores of Lake Chapala

Lake Chapala

Lake Chapala is Mexico's largest freshwater lake. It lies in the municipalities of Chapala, Jocotepec , Poncitlán, and Jamay, in Jalisco, and in Venustiano Carranza and Cojumatlán de Régules, in Michoacán.- Geographic Features :...

, Jalisco

Jalisco

Jalisco officially Estado Libre y Soberano de Jalisco is one of the 31 states which, with the Federal District, comprise the 32 Federal Entities of Mexico. It is located in Western Mexico and divided in 125 municipalities and its capital city is Guadalajara.It is one of the more important states...

, Mexico

Mexico

The United Mexican States , commonly known as Mexico , is a federal constitutional republic in North America. It is bordered on the north by the United States; on the south and west by the Pacific Ocean; on the southeast by Guatemala, Belize, and the Caribbean Sea; and on the east by the Gulf of...

. The shrub grows in shade amidst deciduous woodland at an altitude of 1750 - 2500 m. B. chapalana was first described and named by Robinson

Benjamin Lincoln Robinson

Benjamin Lincoln Robinson was an American botanist.-External links:*...

 in 1891.

Description

B. chapalana is a small 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 0.3 – 2.5 m high, with light grey-brown rimose bark. The young branches are terete, woolly and floccose, bearing thin, membranaceous 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...

 rhomboid

Leaf shape

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

 leaves, 3 – 7.5 cm long by 1.5 - 3.5 cm wide, woolly and floccose on both surfaces. The yellow inflorescences are 3 - 10 cm long, comprising 3 - 6 pairs of globose heads around 1 cm in diameter subtended by small leaves, each head with between 15 and 20 flowers; the corolla tubes are 2 - 2.5 mm long.