Astragalus pinonis var. atwoodii (S.L.Welsh & Thorne) Barneby & Isely
kingdom: Plantae >
subkingdom: Pteridobiotina Britton & Brown >
phylum: Tracheophyta >
class: Magnoliopsida >
order: Fabales Bromhead >
family: Fabaceae >
genus: Astragalus L. >
Arizona