C. angustifolia (Torrey) Greene
Pronunciation: Cryp-tán-tha an-gus-ti-fò-li-a 
(Etymology: having narrow leaves)

C. angustifolia (SDSU 5376) Nutlet, dorsal view, one of small nutlets Scale bar = 1 mm

C. angustifolia (SDSU 5376) Nutlet, ventral view, one of small nutlets Scale bar = 1 mm