Lathyrus lanszwertii var. aridus (Piper) Jeps.
kingdom: Plantae >
subkingdom: Pteridobiotina Britton & Brown >
phylum: Tracheophyta >
class: Magnoliopsida >
order: Fabales Bromhead >
family: Fabaceae >
genus: Lathyrus L. >
species: Lathyrus lanszwertii Kellogg >
California , Nevada , Oregon , Utah , Washington