Contents:
- CSSA tour 2012 – northwest Argentina DANIEL L. MAHR
- The importance of habitat knowledge in the understanding of taxonomy in Cactaceae GUILLERMO RIVERA
- Opuntia sulphurea in northwestern Argentina JUDY PIGUE
- Bromeliads of northwestern Argentina NELS CHRISTIANSON
- Pterocactus of northwestern Argentina ROOT GORELICK
- A typical day on a CSSA fieldtrip DICK SCHREIBER
- Naturalist buddies and naked buds in northwestern Argentina RICK GILLMAN
- Prayer to the Chaco thorn forest NELS CHRISTIANSON
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