One new species,
Astragalus tiehmii, and two new varieties,
A. convallarius var.
margaretae and
A. oophorus var.
lavinii, are described from Nevada; the relationships of each are discussed and the first is illustrated. Two new combinations,
A. eurylobus (Barneby) Barneby and
A. serenoi var.
shockleyi (M. E. Jones) Barneby are proposed and defended. A new species,
A. bryogenes, is described from high Andean Peru (Junín).