948 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 ; 
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....4 
2 Flowers diandrous, having but 2 perfect stamens....« 
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, upper lip arched....¢e 
3 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....6 
5 Corolla limb nearly regular, with 4 or 5 plain, spreading lobes....0 
6 Stamens included in the tube of corolla, generally in pairs... 
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. + Pavtow/n1a. 
b Corolla wheel-shaped, stamens declinate. Scentless. Mudlein.VeRBas’cum. 1 
ce Corolla 4-lobed, minute, white. Plant small. Lvs. radical. 8. AnPuian’THUs. 
ce Corolla 4-lobed. Fls. spiked. Lvs. mostly radical. Scape 1f. N.-W. Sywrur’ris. 
ce Corolla deeply many-cleft, variously colored. Luvs. cleft. + Sonizan’THvs. 
d Corolla protracted into a spur behind. Racemes leafy. Zoad-flax. Lina’rta, 2 
d Cor. swollen intoa sack behind. Rac. leafy. + Snap-dragon. ANTIRRHI/NUM. 
e Bracts lobed, generally colored. Anth.-cells unequal. Painted-cup. CastTILLE’sA. 
e Bracts and leaves entire, green. Flowers purplish.  Chaff-seed. Sounwat’BEA. 
e Bracts and leaves serrate, green. Flowers yellow.  Lousewort. PepicuLa’ris. 
f Tall, erect, with large, nodding flowers. Gardens. fvxglove. Dierra’ is. 
f Low and minute. Corolla equally 5-cleft. In mud. Mudwort, LusoseL’La. 
f Climbing, slender. Corolla large, gibbous at base. + Mexico. Mavran/pta. 
f Climbing, slender. Corolla large, equal at base. + Mexico. Lopnosprr’310M. 
g Corolla labiate. Calyx 5-parted. Sterile filaments minute or 0. Gratr’oLa. 8 
g Corolla labiate. Calyx 5-parted. Sterile filam. forked. Mud-flower. Inysan’ruvus. 
g Corolla labiate. Calyx 4-parted. Flowers very small. Semi-flower. Hem1an/tuus. 
g Corolla rotate, with 4 nearly equal lc bes, lower smallest. Speedwell. VERONICA, & 
