1	"Calyx 5–8, woody and clasping the fruit but apices spreading to recurved"	"Plagiobothrys plurisepaleus"
1	"Calyx 5, tough, erect and loosely sheathing the fruits and with erect apices"	2
2	"Basal leaves linear-oblanceolate, obtuse; mericarps coarsely reticulate and with the scar of attachment raised"	"Plagiobothrys elachanthus"
2	"Basal leaves linear-triangular, tapering into a point; mericarps finely rugose-reticulate, granulate to tubereulate"	"Plagiobothrys orthostatus"