Plant Exploration
My love for desert plants has taken me to incredible locations around the world. I have made over 3,500 herbarium collections, which are deposited at the University of Arizona Herbarium and herbaria across the U.S. and Mexico.
Photo credit: BTW
Please consult and download these floristic references:
Plant collecting, Valle de Condor, Salta, Argentina. Photo: Ivy Yin. 
Passiflora arida, Barajitas Canyon, Sonora, MX. Photo: Alan Harper. 
Meeting a new friend, Tsimanampetsotsa National Park, Madagascar. Photo: Erin Riordan. Tropical Dry Forest, Álamos, Sonora. Photo: BTW. Mammillaria estebanensis, Isla San Esteban. Photo: BTW. 
San Esteban Spiny-tailed Iguana snack, Isla San Esteban. Photo: BTW. In the clouds, Valle de Condor, Salta, Argentina. Photo: Ivy Yin. The giant cardón (Pachycereus pringlei), Punta Cirio, Sonora. Photo: BTW. 
Isla Tiburón with Ernesto Molina. Photo: BTW. San verbena, star dunes, Gran Desierto de Altar. Photo: BTW. 
Tsimanampetsotsa National Park, Madagascar. Photo: BTW. Erin and "Grandmother Baobab" (Adansonia rubrostipa), Tsimanampetsotsa National Park, Madagascar. Photo: BTW. The creeping devil (Stenocereus eruca), Baja California Sur. Photo: BTW. The creeping devil (Stenocereus eruca), Baja California Sur. Photo: BTW. The creeping devil (Stenocereus eruca), Baja California Sur. Photo: BTW. Isla San Pedro Mártir. Photo: John (Verm) Sherman. Jon Rebman and Ben collecting plants on Isla Ángel de la Guarda. Pachycormis discolor at Volcán Tres Vírigenes, Baja California Sur. Photo: BTW. Sand verbina (Abronia villosa), San Felipe desert with the Sierra San Pedro Mártir in the background, Baja California. Photo: BTW The cycad Dioon sonorense, Álamos, Sonora. Photo: BTW. 
Dune primrose (Oenothera deltoides), Gran Desierto de Altar. Photo: Chris Field. 
Volcán Tres Vírgenes. Photo: Rodrigo Renteria. Dune primrose (Oenothera deltoides), Gran Desierto de Altar. Photo: Chris Field. Ben and Wimmeria mexicana, Sierra de la Laguna, Baja California Sur. Photo: Betsy Arnold. 
Ben at the mouth of Canyon Santa Barbara, Álamos, Sonora. Photo: Charlie de la Rosa.
