Prettyface
Jepson eFlora filtered for CW:
Calyx, corolla not inflated in fruit (except lower part of banner in Trifolium barbigerum); involucre bracts generally fused into a cup-, bowl-, or wheel-shaped, toothed or cut ring (except generally +- free in Trifolium monanthum)
Involucre cup- or bowl-shaped, when pressed generally partly hiding flowers (except in Trifolium grayi)
Calyx lobes > 1/2 tube, bristle-tipped
Calyx lobes, involucre lobes +- entire; plant hairs generally finely wavy
= T. microcephalum