396 



XCI. SCROPHULARIACEJE. 



ft. Corolla smaller (limb 1' broad) ; plant smoothish. 



Obs. There is much confusion in this genus. All my specimens, collected by myself and others in Ohio, 

 Indiana, Illinois, Missouri, Tennessee and Alabama, are plainly referable to R. strepens alone. 



ORDER XCI. SCROPHULARIACE^E. FIGWORTS. 



Herbs, under shrubs, or rarely shrubs, scentless or foetid, rarely aromatic. 



Lvs. opposite, verticillate or alternate. Flu. axillary or racemose, rarely spicate. 



Cal. Sepals 4 or 5, unequal, more or less united at base, inferior, persistent. 



Cor. bilabiate, personate or otherwise irregular, the lobes imbricate in aestivation. 



Sta. 4, clidynamous, rarely with the rudiment of the 5th ; sometimes 2 only, the 3 others either rudimen- 



Ova. free, 2-celled, many-seeded. Style simple. Stigma 2-lobed. Itary or wholly wanting. 



Fr-. Capsule 2-celled, 2-valved, with central placenta?. 



Sds. indefinite, albuminous. Embryo straight. 



Genera 176, species 1814, found in every part of the world, from the equator to the regions of perpetual 

 frost. They constitute about 1-36 of the Phacnogamia of N. America. Lindley. 



Projie.rties. Generally acrid, bitter and deleterious planls. The most remarkable officinal species of 

 the tribe is the foxgjove (Digitalis), which exercises a wonderful control over the action of the heart, in 

 regulating its pulsations. It is also employed in cases of dropsy, hemorrhage, &c. Taken in excess it 

 speedily causes death. The Veronica Virginica, (Culvers Physic) and Linaria vulgaris (toad-flax) are 

 purgative and emetic. Numerous species are cultivated for ornament. Nearly all of them turn black in 

 drying. 



FIG. 50. 1. Dasystoma pubescens. 2. Mature fruit. 3. Cross section of the 2-celled capsule. 4. A 

 stamen, enlarged. 5. Mimulus ringens. 6. Calyx with the corolla partly removed, showing the didyna- 

 mous stamens in pairs, with the stigma above the highest pair. 7. Sections of the 2-celled, many-seeded 

 capsule. 8. Plan of the flower, showing the position of the 5th rudimentary filament. 9. Linaria vulga- 

 ris, leaf and personate-bilabiate, spurred flower. 10. A winged seed. 



Conspectus of the Genera. 



f Flowers $ Corolla deeply and variously lobed and colored. . . Schizanthus. 1 

 diandrous. Corolla 4-cleft. Flowers spicate. Peduncle scape-like. Synthiris. 17 



$ spurred at base. . . Linaria. 



f Corolla personate-bilabiate, (saccate at base. . . Antirrhinum. 4 

 $ Corolla yellow. Pedicutaris. 28 

 $ Bracts green. ( Corolla purple. Schwalbea. 26 

 1 Corolla ringent-bilabiate. Bracts lobed and colored. . Castilleja. 

 Fls. didy- | Corolla large, tubular-campanulate, subequal. . . Digitalis. 

 Herbs with alter- namous. I Corolla equally 5-cleft. Minute mud plants. . . . Limoseiia. 

 nate leaves Flowers pentandmui. Corolla rotate, ueaily regular. . . . Veroawum. 



