Dicotyledones. 105 



cleft on the upper and sometimes on the lower side. Corolla 2-lipped, 

 the upper lip elongated, compressed laterally, sometimes curved and 

 keeled ; the lower lip short and 3-lobed. Stamens 4, didynamous, in- 

 closed in the upper lip of the corolla. Capsule many-seeded; style 

 filiform, and stigma entire or 2-lobed. 



1. Castilleia coccinea, Sprang. (L., coccineus, of a scarlet color.) SCARLET 

 PAINTED CUP or INDIAN PAINT-BRUSH. Slender annual or biennial, i to 2 feet 

 high, villous-pubescent. Basal leaves tufted, obovate or oblong, mostly entire. 

 Stem leaves 3-5-cleft into linear or lanceolate segments. Bracts of the inflorescence 

 brilliant scarlet, or rarely yellow. Corolla greenish yellow, its tube included within 

 the 2-cleft calyx. In low meadows and moist thickets. 



2. Castilleia sessiliflora, Pursh. (L., sessilis, low-growing ; flos, floris, flower.) 

 DOWNY PAINTED CUP. Densely leaved perennial, 6 to 15 inches tall, clothed with 

 a fine cinereous pubescence. Lower leaves commonly linear and entire, the upper 

 deeply cleft into narrow, entire, or cleft lobes. Bracts of the inflorescence not bril- 

 liantly colored, green. Lobes of the calyx linear-lanceolate. Corolla yellowish, 

 nearly 2 inches long, its lower lip narrowly lobed. On prairies. 



IV. PEDICULARIS. Lousewort. 

 (L.,pediCTtlus, louse; application not evident.) 



Herbs, with pinnately-lobed, cleft, or divided leaves, mostly lanceolate 

 or linear in general outline. Flowers in terminal spikes or spicate 

 racemes. Calyx tubular, variously cleft or toothed. Corolla 2-lipped, 

 with cylindric tube ; the upper lip laterally flattened, curved, and some- 

 times beaked ; lower lip erect, with 3 spreading lobes. Stamens 4, 

 didynamous, within the upper lip ; anther-sacs equal. Capsule ovate or 

 lanceolate, generally oblique, several-seeded. 



i. Pedicularis Canadensis, L. WOOD BETONY or LOUSEWORT. Hairy 

 perennial with generally clustered stems 6 to 18 inches high. Lower leaves oblong, 

 slender-petioled, pinnately-lobed or parted, the lobes variously toothed. Flowers 

 in short spikes which become elongated in fruit. Calyx cleft on the lower side. 

 Corolla usually greenish yellow or purplish, about 5 inch long; upper lip arched, 

 with 2 minute teeth near the apex. Capsule lanceolate and flat. On banks and in 

 thickets. 



LENTIBULARIACE^. BLADDERWORT FAMILY. 



Herbs, growing in water or in wet places, either floating or rooted. 

 Flowers irregular, solitary or racemose, borne on erect scapes. Calyx 

 2-lipped. Corolla 2-lipped and personate, the upper lip usually erect 

 and concave; lower lip 3-lobed, spreading, forming a nectariferous spur 

 below. Stamens 2, with confluent anther-sacs. Ovary superior, 



