248 THE FLORA. 



Plants mostly herbaceous, witli unsyrametrical^M/:^/"^;, without fragrance ; 

 calyx mostly S-parted, free from the ovary, persistent ; 

 corolla bi-labiate or otherwise irregular, lobes imbricated in the bud ; 

 stamens on the corolla tube, 1 or 3 of the 5 usually imperfect or minute ; 

 ovary 2-celled; style 1; stigma 2-lobed; capsule 2-celled, many-seeded. 



Analysis of the Genera. 



* Herbs with the leaves alternate or all radical. . . .2 



* Herbs with the leaves opposite or sometimes whorled 4 



* Trees with large cordate leaves and large blue panicles. . . .a 



2 Flowers diandrous, having but 2 perfect stamens. . . .c 



2 Flowers didynamons, having 4 stamens, 2 of them longei ... .3 



2 Flowers pentandrous, having the 5 stamens all perfect b 



3 Corolla bi-labiate, with the throat closed (personate).. ..d 

 3 Corolla bi-labmte, throat open, upper lip arched, . . .e 



S Corolla rather bell-shaped, with 5 nearly equal lobes f 



4 Flowers with only 2 perfect stamens g 



4 Flowers with 4 perfect stamens, the 5th scarcely appearing 5 



4 Flowers with 4 perfect stamens and a 5th sterile distinct filament. . . .n 



5 Corolla 2-lipped, the limb quite irregular G 



5 Corolla limb nearly regular, with 4 or 5 plain, spreading lobes o 



6 Stamens included in the tube of corolla, generally in pairs k 



6 Stamens ascending beneath the arched upper lip. . . .m 



6 Stamens descending into the sack-shaped lower lip h 



a Corolla trumpet-shaped, stamens arched downwards. Fragrant, t Paulow'xia. 



b Corolla wheel-shaped, stamens declinate. Scentless. J/w^(fei/'?.VERBAs'cuM. 1 

 c Corolla 4-lobed, minute, white. Plant small. Lvs. radical. S. Amphian^thus. 

 c Corolla 4-lobed. Fls. spiked. Lvs. mostly radical. Scape If. N.-W. Synthi^kis. 

 c Corolla deeply many-cleft, variously colored. Lvs. cleft, t Schizan'thus. 

 d Corolla protracted into a spur behind. Racemes leafy. Toad-jiax. LrN-A''RiA. 2 

 d Cor. swollen into a sack behind. Eac. leafy, t Sawp-dragon. Ky.iiKW^V'^xi'iS.. 

 e Bracts lobed, generally colored, Anth. -cells unequal. Painted-cup. QK^iYiAJ^'ik. 

 e Bracts and leaves entire, green. Flowers purplish. Chaff-seed. Schwal'bea. 

 e Bracts and leaves serrate, green. Flowers yellow. Louseivort. Pedicula''ris. 

 f Tall, erect, with large, nodding flowers. Gardens. Foxglove. Digita''li3. 

 f Low and minute. Corolla equally 5-cleft. In mud. Mudivort. Lbiosel'la. 

 f Climbing, slender. Corolla large, gibbous at base, i Mexico. Mauran''dia. 

 f Climbing, slender. Corolla large, equal at base, f Mexico. Lophosper''iium. 

 g Corolla labiate. Calyx 5-parted. Sterile filaments minute or 0. Gkati'ola, 3 

 g Corolla labiate. Calyx 5-parted. Sterile filam, forked, Mud-Jlower. Ilysan'thus, 

 g Corolla labiate. Calyx 4-parted. Flowers very small, Semi-flrnver. Hemian'thus. 

 g Corolla rotate, with 4 nearly equal kbcs, lower smallest. Speedwell. Verox'ica, 4 



