152 COMMON CANADIAN WILD PLANTS. 



I. Feutste'moii. Corolla 2-Iipped, gradually widening upwards. Sta- 



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



Flowers white or purplish, in a loose panicle. 

 8. Mlm'uliis. Calyx B-angled and ."i-toothed. Upper lip of the corolla 



erect or reiiexed-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. Gratl'ola. Corolla tubular and 2-lipped. Stamens with anthers 



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



peduncles, solitary. Style dilated at the apex. 

 1(1. llysaiL'thrs. 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. 

 -4- -I- Lower lip ofthe^corolla embracing the upper in the bud. 



II. 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'la. 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. Ortbocarp'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. Eupbra'sia. Calyx 4-cleft. Upper lip of the corolla erect, 2-Zobed, 



the sides 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-i. Rart'sla. Calyx 4-cleft. Upper lip of the coroWa, entire, the sides 

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

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



i6. Rhi»au'thus. Calyx fiat, greatly inflated in fruit, 4-toothed^ 

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

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

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

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



17. Pcdlcula'rls. 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. Podfiat, somewhat sword-shaped. 



