152 COMMON CANADIAN WILD PLANTS. 



7. I'eiitstc'iHoii. Corolla 2-lii)ped, eradually widening upwards. Sta- 



mens 4, with a iifth sterile lilaniciit, the latter yellow-bearded. 

 Flowers white or purplish, in a loose panicle. 



8. Sllm'nliis. Calyx 5-anffled and ii-toothed. Upper lip of the corolla 



erector reflexed-spreading, the lower spreading, 3-lohed. Stamens 

 4, alike ; no rudiment of a fifth. Stigma 2-llpped. Flowers hlue 

 or yellow, solitary on axillary peduncles, 

 n. Grntl'ola. Corolla tuhular and 2-llpped. Stamens with antliers 

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

 peduncles, solitary. Style dilated at the apex. 



10. Ily.sau'tlic.s. Corolla tuhular and 2-lipped. Stamens with antliers 



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 oftJte corolla embracing the upper in tlie hud, 



11. Gerar'ilia. Corolla funnel-form, swelling above, the 5 spreading 



l&bes 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. CastlUc'la. Corolla tuhular and 2-llpped, 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. Moral leaves scarlet (rarely yellow) in our species. 

 Corolla pale yellow. 



13. OrtIioearp'u.s. Corolla tubular and 2-lipped. Calyx tubular-cam- 



panulate, 4-cleft. Upper lip of the corolla much narl*ower than 

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

 — N.W. 



14. EiipUra'sIa. Oalyxi-cleft. Upper lip of the corolla erect, 2-Zobe(?, 



th^ides turned back ; 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). 



l.\ nart'sla. 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. , 



IG. KliiikaiiL'tlius. Calyx fiat, greatly inflated in fruit, 4-toothed. 

 Upper lip of the corolla aj-ched, flat, with a minute tooth ou each 

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

 axils, nearly sessile, the whole forming a crowded 1-sided spike. 

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



17. Pcdlcula'rts. Calyx split in front, not inflated in fruit. Corolla 

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

 under the apex. Stamens 4, Podfial, somewhat sword-shaped. 



