248 THE FLORA. 



Plants mostly herbaceous, with unsymmetrioalT^oMer*, without fragrance ; 

 calyx mostly 5-parted, free from the ovary, persistent ; 

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

 stam,ens on the corolla tiAe, 1 or 3 of the 5 usually imperfect or minute ; 

 ovai-y 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 whbrled 4 



* Trees with large cordate leaves and large blue panicles a 



2 Flowers diandrous, having but S.perfect stamens. . . .i^ 

 2 Flowers didynamous, having 4 stamens, 2 of them longer.. ..8 

 2 Flowers pentandrous, having the 5 stamens all perfect. . . .b 

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

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

 3 Corolla rather bell-ehaped, 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 6 



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 Patilow'nia. 



b Corolla wheel-shaped, stamens declinate. Scentless. MuUdn.YESBAa'oBii. 1 

 c Corolla 4-lobed, minute, white. Plant small. Lvs. radical. S. Amphian'thos. 

 V Corolla 4-lobed. Fla. spiked. Lvs. mostly radical. Scape If. N.-W. Synthi'kis. 

 u Corolla deeply many-cleft, variously colored. Lvs. cleft, t Schizan'tbhs. 

 d Corolla protracted into a spur behind. Racemes leafy. Toad-fiax. Lina'eia. 2 

 d Cor. swollen into a sack behind. Eao. leafy, -f Sriap-d/ragon. ANTmKHi'utiM. 

 o Bracts lobed, generally colored. Anth. -cells unequal. PamUd-eup. Castille'ja. 

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

 e Bracts and leaves serrate, green. Flowers yellow. Lousewort. PEDicnLA'ais. 

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

 f Low and minute. Corolla equally 5-cIefV. In mud. Mudwort. LmosEt'LA. 

 f Climbing, slender. Corolla large, gibbous at base, t Mexico. Maurait'dia. 

 f Climbing, slender. Corolla large, equal at base, t Mexico. Lophosper'mum. 

 g Corolla labiate. Calyx 5-partecP. Sterile filaments minute or 0. Grati'ola. S 

 g Corolla labiate. Calyx 5-parted. Sterile fliam. forked. Mud-fiower. Iltsan'thus. 

 g Corolla labiate. Calyx 4-parted. Flowers very small. Semi-flimer. Hemian'thob. 

 g Corolla rotate, with 4 nearly equal lobes, lower smallest. Speedmell. Vebon'joa. 4 



