^{(Photograph = Wilcoxia poselgeri, Arturo de la Garza)}

Introduction

Wilcoxia poselgeri was named variously over time. It was Echinocereus poselgeri, and it has been placed in Cereus. It was even Peniocereus at one time. The several Wilcoxia species belong to the genus Echinocereus, at least according to recent analyses. But, in this post it is Wilcoxia.

The Details

W. poselgeri is found in South Texas and adjoining Mexico. It grows in sandy soils that can accommodate its Dahlia-like tuberous root system. In Texas it grows in the Rio Grande River plains. The flowers are beautiful and may open for several days, closing at night. One report states the flowers are mildly fragrant.

W. poselgeri has thin stems about one centimeter in diameter (often less). The plant grows upright, often in shrubs where it finds support. A single stem arises from the ground that can form 4-8 branches. W. poselgeri is difficult to spot in situ because it is thin and often hidden in brush. However, it is easy to locate when it is in bloom.