FIGWORT FAMILY 801 



apex; lower lip 10-12 mm. long; lobes rounded. In swamps: Ont. Conn. Va. 

 Neb. Sask. Plain. Jl-O. 



19. P. centranthera A. Gray. Stem short, glabrous, with the spike 1.5 

 dm. or less; leaves 5-15 cm. long, glabrous; divisions oval or ovate, doubly den- 

 tate, about 1 cm. long, with callous mucronate teeth; bracts linear or nearly so, 

 ciliate and often toothed towards the apex; calyx about 2 cm. long, its lobes 

 linear to linear-lanceolate; corolla 3-3.5 cm. long, purple or yellowish; galea 

 slightly curved, about 1 cm. long; lip about 8 mm. long with short rounded cren- 

 ate lobes. Mountains: N.M. Colo. Utah Calif. Submont. Ap-Je. 



20. P. crenulata Benth. Stem more or less villous-puberulent, 2-4 dm. 

 high; leaves linear, obtuse, 3-7 cm. long, doubly crenate; spike 3-10 cm. long; 

 bracts similar to the leaves; calyx cleft in front, 2-3-lobed; lobes ovate-lanceolate; 

 corolla 2-2.5 cm. long, purplish or white; galea about 1 cm. long, curved, not 

 beaked, but with two small triangular teeth; lip 7-8 mm. long, rather deeply 

 3-lobed; lobes rounded. Mountains: Wyo. Colo. Nev. Submont. Mont. 

 Je-Au. 



26. RHINANTHUS L. RATTLE-BOX, YELLOW RATTLE. 



Annual, erect, caulescent herbs, blackening in drying. Leaves opposite, 

 toothed or lobed. Flowers perfect, in terminal, leafy, one-sided spikes or soli- 

 tary in the upper leaf-axils. Calyx compressed, 4-toothed, much inflated in 

 age and reticulate. Corolla irregular, 2-lipped; upper lip compressed, arched, 

 minutely 2-toothed below the apex; lower lip shorter, with 3 spreading lobes. 

 Stamens 4, didynamous, ascending under the upper lip; anthers pilose; sacs 

 transverse. Capsule orbicular, flat, loculicidal. Seeds several, orbicular, winged. 



Corolla-tube exserted ; teeth of the upper corolla-lip triangular, 1 mm. long. 



1. R. Kyrollae. 

 Corolla-tube included; teeth of the upper lip rounded. 2. R. rigidus. 



1. R. Kyrollae Chab. Stem 3-7 dm. high, usually without black lines, 

 glabrous, or pilose at the nodes and in decurrent lines, often branched at flowering 

 time, yellowish; leaves elongate, lanceolate, oblong, or linear, dentate, with 

 acute teeth, scabrous; calyx short-hairy, ciliate on the margins; corolla 8-9 mm. 

 long; tube yellow. R. Crista-Galli Rydb.(Fl. Colo.) Thickets and meadows: 

 N.S. Md Colo. Wash. Alta. Submont. Jl-Au. 



2. R. rigidus Chab. Stem 2-6 dm. high, rigid, pilose in decurrent lines, at 

 first simple, later branched, with strongly ascending branches; leaves glabrous or 

 scabrous above and puberulent beneath, lanceolate or linear-lanceolate, dentate 

 and bispidulous-ciliate on the margins; calyx glabrous or puberulent; corolla 7-8 

 mm. long. Meadows: Alta. Colo. Wash. Alaska. Submont. Mont. Je-Au. 



27. MELAMPYRUM (Tourn.) L. COW-WHEAT. 



Annual herbs, often blackening in drying. Leaves opposite, entire or few- 

 toothed. Flowers perfect, solitary in the upper leaf-axils, or in leafy-bracted 

 spikes. Calyx 4-toothed, the upper 2 teeth somewhat longer. Corolla irregu- 

 lar, 2-lipped; tube gradually enlarged upwards; upper lip compressed, obtuse or 

 retuse; lower Up 3-lobed, 2-grooved beneath. Stamens 4, didynamous, ascend- 

 ing under the upper lip. Anther-sacs parallel. Capsule flat, oblique, loculicidal. 

 Seeds 2-4, smooth, strophiolate. 



1. M. lineare Lam. Stem 1-5 dm. high, 4-angled, with puberulent lines; 

 leaves lanceolate or linear-lanceolate, acuminate, shprt-petioled, 2-7 cm. long, 

 entire; bracts broader, often ovate-hastate, or with salient bristle-pointed 

 teeth; calyx-teeth subulate; corolla 8-12 mm. long, white or whitish, turning 

 purplish. " Dry woods: N.S. N.C. Ida. B.C. Mont. My-Au. 



Family 118. LENTIBULARIACEAE. BLADDERWORT FAMILY. 



Small scapose or caulescent herbs, growing in water or wet places. Leaves 

 when submerged dissected into linear or filiform segments, often bladder- 

 bearing, or when aerial basal and entire, or rarely wanting. Scapes naked 



