''Buddleja simplex'' is probably extinct, as no record of it has been made for nearly 200 years. It was a species

endemic Endemism is the state of a species being found in a single defined geographic location, such as an island, state, nation, country or other defined zone; organisms that are indigenous to a place are not endemic to it if they are also found els ...

to Saltillo in

Mexico Mexico ( Spanish: México), officially the United Mexican States, is a country in the southern portion of North America. It is bordered to the north by the United States; to the south and west by the Pacific Ocean; to the southeast by Guate ...

, described and named by Kraenzlin in 1912.Kraenzlin, F. W. L. (1912). ''Ann. Naturhist. Mus. Wien'' 26: 396, 1912Norman, E. M. (2000). Buddlejaceae. ''Flora Neotropica 81''. New York Botanical Garden, USA

Description

''Buddleja simplex'' is a small shrub, the young branches subquadrangular with adpressed tomentum. The small, membranaceous oblong to elliptic or oblong to lanceolate leaves have 0.5 – 1.5 cm petioles, and are 2 – 4 cm long by 0.5 – 1.2 cm wide, tomentulose above, tomentose below. The bracted

inflorescences 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. Morphologically, it is the modified part of the shoot of seed plants where flowers are formed on ...

are 5 – 10 cm long, comprising 8 – 10 pairs of sessile or pedunculate heads < 0.6 cm in diameter. The species is considered very close to ''B. sessiliflora'', the latter having marginally larger flower heads and longer fruits.

References

{{Taxonbar, from=Q4984713

simplex In geometry, a simplex (plural: simplexes or simplices) is a generalization of the notion of a triangle or tetrahedron to arbitrary dimensions. The simplex is so-named because it represents the simplest possible polytope in any given dimension ...

Flora of Mexico Flora of Central America Taxa named by Friedrich Wilhelm Ludwig Kraenzlin