404 XCI. SCROPHULARIACE.E. DIGITALIS. 



H. MICRANTHEMOIDES. Nutt. (Herpestis micrantha. Ell.) 



Inundated banks, Del., Nuttall. Stems a few inches in length, dichoto- 



mously branched." Leaves roundish-ovate, opposite, crowded, sessile, obscurely 



3-veined. Flowers axillary, solitary, minute. Aug. Sept. 



TRIBE 6. SIBTHORPEJ3. 

 16. LIMOSELLA. 



Lat. limus, mud ; the plant grows by the edge of puddles and muddy places. 



Calyx 5-cleft ; corolla shortly camparmlate, 5-cleft, equal ; stamens 

 approximating in pairs; capsule partly ,2-celled, 2-valved, many- 

 seeded. Minute, aquatic herbs. Scape l-floivered. 



L. TENUIFOLTA. Nutt. (L. subulata. Ives and 1st edit.') Mudwort. 

 Acaule'scent ; Ivs. linear, scarcely distinct from the petiole ; scape as long 

 as the leaves ; cor. segments oval-oblong, shorter than the calyx. R. I. ! 

 Mass. ! N. Y., Penn. A minute plant, an inch in height, growing on the 

 muddy banks of rivers. Leaves and flower-stalks radical. Flowers very small, 

 blue and white. Aug. 



TRIBE 7. DIGITALEJ3. 



Inflorescence centripetal, racemose. Leaves all alternate, the lower crowded, 



petiolate. Benth. 

 17. SYNTHYRIS. Benth. 



Calyx 4-parted ; cor. subcampanulate. segments 4, erect-spreading 

 or ; sta. 2, inserted into the tube of the corolla, exserted ; anth. 

 cells parallel, distinct ; caps, compressed, obtuse or emarginate, locu- 

 licidal, seeds plano-convex. % N. American, with a thick root. Radi- 

 cal Ivs. petiolate, cauline bract-like, on the scape-like stem, alternate. Pis. 

 racemed or spicate. 



S. HOUGHTONIANA. Benth. (Gymnandra Houghtoniana. Torr. fy Gray, 

 in edit.') Hirsute ; radical Ivs. ovate, subcordate at base, crenulate, obtuse ; 

 scape erect, clothed with foliaceous bracts, dense-flowered above ; cor. as long 

 as the calyx, upper segment longer than the other very short ones. Dry hills, 

 Wis., Lapham! Leaves 2 3' by 1J 2', on petioles about I' long, some of the 

 leaves often suborbicular. Bracts much smaller, ovate and ovate-lanceolate, 

 clasping. Scape 9 12' high. Spike elongating in fruit. 



18. DIGITALIS. 



Lat. digitabulum, a thimble ; from the form of the flowers. 



Calyx 5-parted ; corolla campanulate, ventricose, in 5 subequal 

 lobes ; capsule ovate, 2-celled, 2-valved, with a double dissepiment. 

 Herbs or shrubs of Europe arid Asia. Lower Ivs. crowded, petiolate, 

 upper alternate. Fls. in showy racemes. 



1. D. PURPUREA. Purple Foxglove. Lvs. oblong, rugose, crenate ; cal. seg- 

 ments ovate-oblong; cor. obtuse, upper lip entire ; ped. as long as the calyx. 

 Native of Europe. A well known, showy border flower of easy culture. It is 

 a biennial plant 2 3f high, with large, rough, downy leaves. Flowers nume- 

 rous, in a long, simple spike, large, crimson, often white, with beautiful eye- 

 like spots within. The whole plant is a violent and dangerous poison when 

 taken in considerable quantities, producing delirium, convulsions and death. 

 But in the hand of the judicious physician it becomes a valuable medicine, act- 

 ing as a sedative and diuretic. July. $ f 



2. D. FERRUGINEA. Iran-colored Foxglove. Lvs. oblong-lanceolate, very smooth; 

 rac. many-flowered ; cal. segments oval-elliptical, obtuse ; cor. limb subglobose, 

 woolly, lower segment ovate. 7J. in Greece, Armenia and Circassia. Corolla 

 rust-colored, 16" long, lower lip longest, densely bearded, f 



