94 



7a. Corolla regular; leaves ovate or ovate-lanceolate (summer) 



Bluebell, Mertensia paniculata. 

 7b. Corolla irregular; leaves linear-oblong (summer) 



Blneweed, Echium vulgare. 



8a. Ovary and fruit covered with hooked prickles 9. 

 8b. Ovary and fruit not prickly 12. 



9a. Principal leaves 2.5 cm. wide or more 10. 



9b. Principal leaves 2 cm. wide or less (3 8 dm. high; flowers blue 

 or white, summer) (Stickseed) 11. 



lOa. Leaves chiefly basal, the racemes on long leafless peduncles 

 (4 8 dm. high; flowers pale blue, early summer) 



Wild Comfrey, Cynoglossum boreale. 

 lOb. Stems leafy (8 12 dm. high; flowers white, summer) 



Beggar Lice, Lappula \irgiuiana. 



lla. A bract at the base of each flower Stickseed, Lappula echinata. 

 lib. Racemes without bracts at the base of each flower 



Stickseed, Lappula deflexa var. americana. 



12a. Racemes bractless, or bracted only at the base (14 dm. 



high) 14. 

 12b. Raceme with a bract at the base of each flower (flowers 



white or yellowish) 17. 



13a. .Corolla 4 mm. wide Forget-me-not, Myosotis laxa, 



13b. Corolla 68 mm. wide Forget-me-not, Myosotis scorpioides. 



14a. Calyx-lobes all of equal length (summer) 



Scorpion Grass, Myosotis arvensis. 

 14b. Calyx-lobes distinctly unequal in length (spring) 



Scorpion Grass, Myosotis yirginica, 



15a. Corolla-lobes denticulate Puccoon, Lithospermum augustifolium. 

 15b. Corolla-lobes entire 16. 



16a. Flowers sessile; stem softly pubescent 



Puccoon, Lithospermum canescens. 



16b. Flowers on pedicels 2 5 mm. long; stem hispid or bristly 



Puccoon, Lithospermum gmelini. 



17a. Corolla white; fruit brown and writfkled (weed 2 4 dm. high; 

 spring and summer) Corn Gromwell, Lithospermum arvense. 



17b. Corolla yellowish-white; fruit white and smooth (5 10 dm. 

 high) 18. 



18a. Corolla distinctly surpassing the calyx in length (spring 

 and summer) Corn GromwelL, Lithospermum officinale. 



18b. Corolla equaling or shorter than the calyx (spring) 



Wild Oromwell, Lithospermum latifolium. 



