102 



3a. Flowers 1 hot the bracts) greenish-yellow, yellow, or orange 4. 

 3b. Flowers blue, purple, brown, red, pink, or white, never yel- 

 low 16. 



4a. Flowers in dense terminal leafy-bracted spikes 5. 

 4b. Flowers in loose racemes or axillary 9. 



5a. Corolla 7 mm. long or less, or none 6. 

 5b. Corolla 12 mm. long or more 7. 



6a. Leaves alternate (3 6 dm. high; early summer) 



Synthyris, Synthyris bulliL 

 6b. Leaves opposite (1 2 dm. high; summer) 



Eyebright, Euphrasia arctica. 



7a. Stem-leaves entire (2 6 dm. high; -summer) 



Painted Cup, Castilleja pallida var. septentrionalis. 



7b. Stem-leaves palmately lobed, bracteal leaves scarlet (3 6 dm. 

 high; early summer) Painted Cup ; Castilleja coccinea. 



7c. Stem-leaves pinnately lobed or incised (Lousewort) 8. 



8a. Flowers in spring (2 4 dm. high) 



Lousewort, Pedicularis canadensis. 

 8b. Flowers in late summer (3 8 dm. high) 



Lousewort, Pedicularis lanceolata. 



9a. Upper lip of the corolla very different in size and shape from the 



lower lip 10. 

 9b. Upper lip of the corolla resembling the lower lip in shape, and 



not very different in size (5 12 dm. high; summer) (False 



Foxglove) 13. 



lOa. Leaves alternate (2 5 dm. high; summer) 



Butter-and-egg-s, Linaria vulgaris. 



lOb. Leaves opposite 11. 



lla. Stem erect; leaves narrowed at the base 30b. 

 lib. Stem creeping or spreading ('summer) 12. 



12a. Leaves pinnately veined, ovate 



Musk -Flower, Mimulus moschatus. 

 12b. Leaves palmately veined, circular or nearly so 



Yellow Monkey Flower, Mimulus glabratus var. jamesii. 



13a. Stem glabrous 14. 

 13b. Stem pubescent 15. 



14a. Principal stem-leaves pinnatifid 



False Foxglove, Gerardia virginica. 

 14b. Principal stem-leaves entire 



False Foxglove, Gerardia laevigata* 



15a. Corolla hairy on the outside 



False Foxglove, Gerardia pedicularia. 

 15b. Corolla smooth on the outside False Foxglove, Gerardia flava. 



