Key to Wisconsin Castilleja

Author: John G. Zaborsky

• 1a.Corolla tube (25–) 30–50 mm long, greatly exserted from the calyx; bracts and calyces greenish to cream to white; stems clustered, from a woody crown; perennials C. sessiliflora

• 1b.Corolla tube (17–) 20–24 (–28) mm long, concealed by the calyx or slightly exserted; bracts and calyces with red to orange to yellow tips; stems arising singly (rarely two or more) from a basal rosette; annuals or biennials C. coccinea