THE FLORA. 



Plants mostly herbaceous, with unsymmetrical flowers, without fragrance 

 calyx mostly 5-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 , 

 wary 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 



* Hurbs with the leaves opposite or sometimes whorled 4 



Trees with large cordate leaves and large bine panicles a 



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

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

 2 Flowers pentnndrons, having the 5 stamens all perfect. . . .t> 

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

 8 Corolla bi-labiate, throat open, upper lip arched. . . .e 

 3 Corolla rather bell-shaped, with 5 neurlj 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 6 



5 Corolki 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'NIA. 



b Corolla wheel-shaped, stamens declinate. Scentless. Mulfan.VERBAa'cvit. 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. SYNTIII'RIS. 

 c Corolla deeply many-cleft, variously colored. Lvs. cleft, t SCHIZAN'THUS. 

 d Corolla protracted into a spur behind. Racemes leafy. Toad-flax. LENA'RIA. 2 

 d Cor. swollen into a sack behind. Rac. leafy, t Snap-dragon. ANTIRHHI'NUM. 

 e Bracts lobcd, generally colored. Anth. -cells unequal. Painted-cup. CASTILLE'JA. 

 e Bracts and leaves entire, green. Flowers purplish. Chaff-seed. SCHWAL'BEA. 

 e Bracts and leaves serrate, green. Flowers yellow. Lousewort. PEDicuLA'ma. 

 f Tall, erect, with large, nodding flowers. Gardens. Foxglove. DIOITA'LIS. 

 f Low and minute. Corolla equally 5-cleft. In mud. Jdudwort. LIMOSKL'LA. 

 f Climbing, slender. Corolla large, gibbous at base, t Mexico. MACKAN'DIA. 

 f Climbing, slender. Corolla large, equal at base, t Mexico. LOPIIOSPEK'HUM. 

 g Corolla labiate. Calyx 5-parted. Sterile filaments. minute or 0. GRATI'OJ.A. 8 

 g Corolla labiate. Calyx 5-parted. Sterile filam. forked. Mud-flower. ILYSAN'THWS. 

 g Corolla labiate. Calyx 4-parted. Flowers very small. Semi-jlower. HEMIAN'THUS. 

 B Corolla rotate, with 4 nearly equal k bes, lower smallest. Speedwell. VEKON'IV.V. 4 



