Prosopis pubescens seed pod (Screwbean Mesquite, or Tornillo), watercolor and graphite on honey vellum, © 2012, Deborah Shaw, all rights reserved.

Prosopis pubescens seed pod (Screwbean Mesquite, or Tornillo), watercolor and graphite on honey vellum, © 2012, Deborah Shaw, all rights reserved.

Prosopis pubescens seed pod (Screwbean Mesquite, or Tornillo), watercolor and graphite on honey vellum, © 2012, Deborah Shaw, all rights reserved.