Thelesperma simplicifolium

Thelesperma simplicifolium, commonly known as the slender greenthread, is a species of greenthread found from Texas and Mexico. It is typically found in openings in oak or juniper woodlands or on desert scrub.

Description
Thelesperma simplicifolium is a perennial herb. It typically grows 30 to 70 cm tall. The cauline leaves are "scattered over proximal 3/4+ of plant heights". There are usually 8 ray florets per flower head. The ray laminae are yellow.

Varieties
As of July 2023, Plants of the World Online accepts 2 varieties of Thelesperma simplicifolium:
 * Thelesperma simplicifolium var. macrocarpum Melchert. (Nuevo León)
 * Thelesperma simplicifolium var. simplicifolium (Texas, northeast and southwest Mexico)