KEY TO THE NORTH AMERICAN SPECIES OF AGRINTOTTIA.
Leaflets serrate, dentate or crenate with numerous teeth.
Racemes and leaves beneath glabrous or with loose spreading hairs.
Roots not tuberous; fruit large, turbinate, with numerous radiating bristles.
hirszeta.
Roots tuberous-thickened ; fruit very small, hemispheric, with few ascending or erect bristles. 2. A. striala.
Racemes and lower surface of the leaves closely or softly pubescent.
Roots tuberous; items pubescent ; leaflets not glandular-dotted beneath.
Small or simple, with elongated terminal raceme, leaflets 3-5.
3. A, pumila.
Larger, branched, leaflets 5—i 1. 4. A. mollis.
Roots not tuberous ; stems hirsute ; leaflets glandular-dotted beneath. Leaflets 5-9, oblong or rhomboid; fruit large, the bristles connivent, 5. A. Brittoniana.
Leaflets 9-23, lanceolate ; fruit small, the bristles radiate.
6. A. parvifiora.
Leaflets incised with few salient teeth. 7. A. incisa.