152 COMMON CANADIAN WILD PLANTS. 



7. Peutste'mon. Corol la 2-lipped, gradually widening upwards. Sta- 



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

 Flowers white or purplish, in a loose panicle. 



8. Him u Ins. 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. 



9. Grati'ola. Corolla tubular and 2-lipped. Stamens ivith anthers 

 only 2, included. Flowers with a yellowish tube, on axillary 

 peduncles, solitary. Style dilated at the apex. 



10. I I.ysHii't IKVS. 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. 



H- -t- Lower Up of the corolla embracing the upper in the bud. 



11. 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 yel- 

 low, solitary on axillary peduncles, or sometimes forming a 

 raceme. 



12. 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, didy- 

 namous. Floral leaves scarlet (rarely yellow) in our species. 

 Corolla pale yellow. 



13. Orthocarp'us. Corolla tubular and 2-lipped. Calyx tubular-cam- 



panulate, 4-cleft. Upper lip of the corolla much narrower than 

 the inflated lower one. Flowers golden yellow, in a dense spike. 

 N.W. 



14. Euphra'sia. Calyx 4-cleft. Upper lip of the corolla erect, 2-lobed, 



the sides turned bade ; the lower spreading. Stamens 4, under the 

 upper lip. Very small herbs, with whitish or bluish spiked 

 flowers. (Chiefly on the sea-coast, and north of Lake Superior). 



15. Kart sin. Calyx 4-cleft. Upper lip of the corolla entire, the sides 



not turned back. Flowers small, rose-red, in loose spikes. Small 

 herbs with opposite sessile leaves. Atl. sea-coast chiefly. 



16. IMiiii.-m Ilius. Calyx flat, greatly inflated in frnit, 4-toothed. 



Upper lip of the corolla arched, flat, with a minute tooth on each 

 side below the apex. Stamens 4. Flowers yellow, solitary in the 

 axils, nearly sessile, the whole forming a ci'owded 1-sided spike. 

 (Chiefly on the sea-coast, and north of Lake Superior.) 



17. Pedicnla'ris. Calyx split in front, not inflated in fruit. Corolla 



2-lipped, the upper lip arched or hooded, incurved, flat, 2-toothed 

 under the apex, Stamens 4. Pod flat, somewhat sword-shaped, 



