SCROPHULARIACEjE. 95 



,\ 



Synopsis of the Genera. 



* Corolla wheel-shaped, and only sliyhtly irregular. 



I. Verbas'cum. Stamens (icith anther*) 5. Flowera in a long terminal 



spike. Corolla 5-parted, nearly regular. Filaments (or some of them) 

 svoolly. 



2. Yu-m'ica. Stamens only 2; filaments long and slender. Corolla mostly 

 4-parted, nearly or quite regular. Pod flattish. Flowers solitary in the 

 axils, or forming a terminal raceme or spike. 



* * Corolla, % -lipped, or tubular and irregular. 



-*- Upper lip of the corolla embracini the lower in the bud, except occasionally 

 in Mimulus. 



3. LJna'ria. Corolla, personate (Fig. 181, Part I.), with a. long spur beneath. 



Stamens 4. Flowers yellow, in a crowded raceme. 



4. Scrophula'ria. Corolla tubular, somewhat inflated, 5-lobed ; the k upper 



lobes erect, the lower one spreading. Stamens with anthers 4, the rudi- 

 ment of a fifth in the form of a scale on the upper lip of the corolla. 

 Flowers small and dingy, forming a narrow terminal panicle. Stem 

 4-sided. 



5. Clielo'ne. Corolla inflated-tubular (Fig. 180, Part I.). Stamens 4, with 



woolly filaments and anthers, and a fifth filament without an anther. 

 Flowers white, in a close terminal spike. 



6. Pentste'mon. Corolla 2-lipped, gradually widening upwards. Stamens 



4, with a fifth sterile filament, the latter yellow-bearded. Flowers white 

 or purplish, in a loose panicle. 



7. Mim'ulus. Calyx 5-angled and 5-toothed. Upper lip of the corolla erect 



or reflexed-spreading, the lower spreading, 3-lobed. Stamens 4, alike; 

 no rudiment of a fifth. Stigma 2-lipped. Flowers blue or yellow, solitary 

 on axillary peduncles. 



8. Grati'ola. Corolla tubular and 2-lipped. Stamens with anthers only 2, 



included. Flowers with a yellowish tube, on axillary peduncles, solitary. 

 Style dilated at the apex. 



9. Ilysan'thes. Corolla tubular and 2-lipped. Stamens with anthers only 2, 



included; also a pair of filaments which are two-lobed, but without 

 anthers. Flowers purplish, axillary. Style 2-lipped at the apex. 

 *- -- Lower lip of the corolla embracing the upper in the bud. 



10. Gerar'dia. Corolla funnel-form, swelling above, the 5 spreading lobes 



more or less unequal. Stamens 4, strongly didynamous, hairy. Style 

 long, enlarged at the apex. Flowers purple or yellow, solitary on axil- 

 lary peduncles, or sometimes forming a raceme. 



II. Castille'ia. Corolla tubular and 2-lipped, its tube included in the tubular 



and flattened calyx; the upper lip long and narrow and flattened 

 laterally, the lower short and 3-lobed. Stamens 4, didynamous. Floral 

 leaves scarlet (rarely yellow) in our species. Corolla pale yellow. 



