Author Archives: Steven Van Heiden

An exciting development

Conducting and publishing good scientific research on the cactus species which are experiencing human pressure is our passion. To perform field work involving those cacti commonly requires the willingness to brave thorny vegetation and the ability to tolerate intense sun, high heat, and wind-blown dust that can be extreme enough to interfere with the functioning […]

South Texas in March 2018

Some cacti that we encountered in March while we were in South Texas (images and data of the study group will be coming soon.)        

Presidio County in March 2018

A few images of some of the cacti that we encountered in Presidio County earlier this year.

Physaria thamnophila (Rollins & E.A. Shaw) O’Kane & Al-Shehbaz

This is our first blog post but it is not about a cactus. In March of 2018, we were fortunate to have been permitted to see the rare and endangered Zapata bladderpod in habitat.  Its habitat is small but federally protected and off-limits to casual visitors. Despite that level of protection, it is threatened by […]