RHINANTHACEAE 1063 



Corolla yellow : leaf-blades nearly as broad as long. 1. M. Jamesii. 



Corolla blue, violet or white : leaf-blades much longer than broad. 



Leaf-blades petioled : calyx longer than the pedicel. ' 2. M. alatus. 



Leaf-blades sessile : calyx shorter than the pedicel. 3. M. ringens. 



1. Mimulus Jamesii Torr. Stems usually branched at the base ; branches 1-4 dm. 

 long, spreading and creeping : leaf-blades ovate to orbicular-reniform, 1-4 cm. long, 

 dentate or sinuate-dentate, most of them short-petioled : calyx 5-6 mm. long, often slightly 

 accrescent, the upper lip merely acute, longer than the lower lip : corolla yellow, fully 1 

 crn. long, the lower lip bearded within : capsules 5-8 mm. long. 



In swamps and streams, Ontario to Montana, Texas, Arizona and Mexico. Summer and fall. 



2. Mimulus alatus Soland. Rootstocks often tuberous-thickened. Stems 2-10 dm. tall, 

 square and 4-winged : leaf-blades thickish, elliptic to elliptic-lanceolate, 5-15 cm. long, 

 serrate; petioles 1-2 cm. long: pedicels stout, 5-6 mm. long, 4-winged : calyx 12-15 mm. 

 long, slightly dilated upward, each plait ending in a short folded mucro about 1 mm. 

 Jong : corolla about 2 cm. long : capsule hardly distending the calyx-tube. 



In swamps and meadows, Connecticut to Illinois, south to Florida and Texas. Summer and fall. 



3. Mimulus ringens L. Rootstocks elongated. Stem 3-12 dm. tall, flattened, the 

 edges grooved : leaf-blades lanceolate or narrowly elliptic, 5-20 cm. long, shallowly and 

 remotely serrate, sessile, the lower ones constricted above the base, more or less auricled 

 and clasping : pedicels slender, 2-4 cm. long, 2-winged above : calyx 12-20 mm. long, each 

 plait ending in a folded mucro ranging from 3-6 mm. in length : corolla 2.5-3 cm. long : 

 capsule manifestly distending the calyx-tube. 



In swamps and in damp banks, Nova Scotia to Manitoba, Georgia and Texas. Summer and fall. 



13. STEMODIA L. 



Annual or perennial caulescent often aromatic herbs, with pubescent foliage. Leaves 

 opposite or whorled : blades flat, toothed. Flowers solitary in the axils, sometimes in 

 dense spike-like racemes. Calyx-lobes equal or nearly so. Corolla blue or purplish, 

 2-lipped. Stamens 4, included : filaments filiform : anther-sacs widely separated. Styles 

 dila/ed to the 2-lobed or dilated stigma. Capsule septicidally 2-valved, the valves 2-cleft. 

 Seeds striate or reticulated. 



Foliage viscid-pubescent : stems and branches erect or ascending. 1. S. durantiJoUa. 



Foliage white-woolly : stems and branches prostrate or procumbent. 2. S. lanata. 



1. Stemodia durantifolla (L. ) Sw. Foliage viscid-pubescent. Stems 3-6 dm. 

 tall, simple or sparingly branched : leaves opposite or in whorls of 3 or 4 ; blades oblong 

 to lanceolate or linear-lanceolate, acute or acuminate, serrate, more or less auricled at the 

 base and partly clasping : racemes elongated : calyx-lobes linear-subulate, 5-6 mm. long : 

 corolla azure-blue or purplish, about 1 cm. long ; tube somewhat dilated about the middle ; 

 lobes truncate or retuse : capsules conic-ovoid, 3-4 mm. long. 



In wet soil, Texas to Arizona and tropical America. 



2. Stemodia lanata R. & P. Foliage white-woolly. Stems more or less branched, 

 the branches prostrate or procumbent, several dm.. long: leaf-blades mainly oblong, 1-4 

 cm. long, dentate, sessile and clasping by the cordate base. 



In low places, southern Texas and Mexico. 



14. CONOBEA Aubl. 



Annual or perennial caulescent often glandular-pubescent herbs. Leaves opposite : 

 blades toothed, incised, pinnatifid or parted. Flowers solitary or 2 together in the axils. 

 Calyx-lobes unequal, longer than the tube. Corolla white or blue, 2-lipped. Stamens 4, 

 included : anther-sacs parallel, contiguous. Styles united, incurved. Capsules septici- 

 dally dehiscent, the valves entire or 2-cleft. Seeds striate. 



1. Conobea multifida (Michx. ) Benth. Annual, viscid-pubescent. Stems 1-2 dm. 

 tall, often mnch branched : leaf-blades 1-2 cm. long, pinnately parted into narrow entire 

 or toothed segments : peduncles much shorter than the subtending bracts : calyx sessile, 

 rather surpassed by the 2 subtending bractlets ; lobes narrowly linear, 2-2.5 mm. long ; 

 corolla about 3 mm. long : capsules narrowly ovoid, 3 mm. long. 



On river banks and prairies. Pennsylvania to Iowa, Tennessee and Texas. Summer and fall. 



15. MONNIERA P. Br. 



Perennial succulent odorless herbs, with terete creeping stems. Leaves opposite : 

 blades entire or very slightly toothed, broadest above the middle, palmately nerved, sessile. 



