Buddleja corrugata is a species endemic to north-western 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...

 including the Baja California Sur

Baja California Sur

Baja California Sur , is one of the 31 states which, with the Federal District, comprise the 32 Federal Entities of Mexico. Before becoming a state on October 8, 1974, the area was known as the South Territory of Baja California. It has an area of , or 3.57% of the land mass of Mexico and comprises...

, growing on limestone at altitudes of 200 – 1900 m; it was first described and named by Jones

Marcus E. Jones

Marcus E. Jones was an American geologist, mining engineer and botanist. Throughout his career he was known for being an educator, scientist and minister. As an early explorer of the western United States he is known as the authority for numerous vascular plants. Much of his career was spent...

 in 1933.

Description

B. corrugata 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...

, multi-branched shrub 0.1 – 1 m high, with grey - black rimose bark. The young branches are terete and tomentose

Tomentose

Tomentose is a term used to describe plant hairs that are flattened and matted, forming a woolly coating known as tomentum. Often the hairs are silver or gray-colored...

, bearing small, 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...

, subcoriaceous ovate

Leaf shape

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

, ovate-oblong

Leaf shape

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

, or linear

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 1 – 4 cm long by 0.2 – 3 cm wide. The yellow or orange inflorescences comprise 3 - 8 pairs of globose heads 0.5 – 1 cm in diameter, each with between 6 and 20 flowers, subtended by short bracts; the corolla tubes are 2 – 4 mm long.

The species is considered closely related to Buddleja utahensis

Buddleja utahensis

Buddleja utahensis is a species of butterfly bush native to the southwestern United States, where it is known by the common names Utah butterfly bush and Panamint butterfly bush.-Description:B...

and Buddleja marrubiifolia

Buddleja marrubiifolia

Buddleja marrubifolia is a species endemic to the Chihuahuan Desert from southern Texas to San Luis Potosí in Mexico, where it grows on limestone and gypsum soils in canyons and arroyos at elevations of 600 - 2,250 m. The species was first named and described by Bentham in 1846.-Description:B...

.

Subspecies

Jones identified three subspecies, distinguished by differences in the leaves:

• B. corrugata subsp. corrugata
• B. corrugata subsp. gentryi
• B. corrugata subsp. moranii