XXX 



GROUP 4, DICOTYLEDONES 



la. Foliage leaves all or principally basal; flower-stalk either com- 

 pletely leafless, or bearing a single pair of opposite leaves only. 

 Bracts and scale-leaves are not considered foliage leaves 2. 



Ib. Stem-leaves present on the stem, either one or more in number, 

 and not limited to a single opposite pair 3. 



2a. Leaves compound 7. 

 2b. Leaves simple 18. 



3a. Stem-leaves all OT chiefly opposite or whorled (the bracts of the 



flower clusters may be alternate) 4. 

 3b. Stem-leaves all or chiefly alternate 5. 



4a. Flowers small and inconspicuous, the perianth none or green- 

 ish or chaffy, and never petal-like in appearance 50. 

 4b. Flowers with a white or colored petal-like perianth 66. 



5a. Flowers small and inconspicuous, without any white or colored 



petal-like perianth 118. 

 5b. Flowers large or small, but with a white or colored petal-like 



perianth 6. 



6a. Flowers small, not exceeding 3 mm. in length or breadth 



144. 

 6b. Flowers larger, more than 3 mm. in length or breadth 166. 



7a. Leaves twice to three times compound or dissected 8. 

 7b. Leaves once-compound 11. 



8a. Flowers in racemes 2b, in FUMARIACEAE, p. 41. 



8b. Flowers in umbels 9. 



9a. Flowers about 3 mm. wide, white or greenish-white 10. 

 9b. Flowers 10 20 mm. wide, conspicuous 



45b, in RANUNCULACEAE, p. 39. 



lOa. Leaflets 515 cm. long 5b, in ARALIACEAE, p. 80. 



lOb. Leaflets not over 2 cm. long 



16a, in UMBELLIFEKAE, p. 81. 



lla. Leaflets 2 3a, in BERBERIDACEAE, p. 40. 



lib. Leaflets three or more 12. 



12a. Leaflets entire or very finely toothed 13. 

 12b. Leaflets coarsely toothed or lobed 15. 



