Mentzelia sect. Micromentzelia
Nat. Pflanzenfam. 100[III,6a]: 110. 1894
Herbs or subshrubs, perennial. Leaves: basal rosette absent, proximalmost internodes 5 mm; blade without broad basal lobes, margins entire, toothed, or pinnatisect, revolute. Flowers: stamens all fertile, filaments monomorphic, filiform, unlobed; ovules (and seeds) oriented parallel to long axis of ovary. Capsules ovoid to urceolate, straight. Seeds ovoid to bottle-shaped, mostly trigonal, not winged; seed coat cells polygonal, longer than wide, anticlinal walls sinuous.
w United States.