Nutlets (dorsal view at left, ventral at right) and stem morphology of the three recognized varieties of C. muricata, series Muricatae A Cryptantha muricata var. denticulata B Cryptantha muricata var. jonesii C Cryptantha muricata var. muricata. Accession numbers of specimens sampled indicated. Note variation in nutlet sculpturing and stem vestiture that is strigose and hispid.