S1
Critically Imperiled
Viola calcicola (Limestone Violet)
Acaulescent perennial herb from a short (ca 2.5 cm) vertical rhizome bearing stout fibrous roots; leaves all unlobed or rarely shallowly trilobate; petioles of longest leaves 3-7 cm; leaf blades cordate, triangular-cordate to deltoid with rounded-ser...
Zigadenus mogollonensis (Mogollon Death Camas)
Perennial, to 8.5 dm tall from slender ovoid bulbs; basal leaves linear, to 35 cm long; stem leaves fewer and smaller; flowering stem, one per bulb; inflorescence sparsely branched or a single raceme with small leaf-like bracts below each flower that...