6 ELEMENTS OF BOTANY. 



Perianth regular ; in 2 series, the outer sepal- 

 like. 



Epiphytes or parasites 8. Bromeliacese. 



Terrestrial, petals deliquescent . . . 9. CoinmelinaceSD. 



Terrestrial, petals withering-persistent . 14. Coiivallariaceso. 

 Perianth regular, segments nearly alike, 

 petaloid. 

 Fruit capsular. 

 Styles distinct or partly united . . 12. Melanthacese. 

 Styles wholly united .... 13. LiliaceSB. 



Fruit berry-like. 

 Stems climbing by tendrils ... 15. SmilaceSB. 



Stems not climbing 14. CouvallariacesB. 



Perianth irregular. 



. Perianth in 2 series, the outer sepal-like . t). Commelinacese. 



Perianth in a single series, the segments 



united 10. FoiitederiacefE. 



Perianth adnate to the ovary. 

 Stamens with anthers, 1 or 2 . . . . 19. Orchidaceae. 

 Stamens 3, opposite the inner perianth seg- 

 ments 10. Htemodoraceae. 



Stamens 3, opposite the outer perianth seg- 

 ments 18. Iridaceae. 



Stamens G 17. Aiiiaryllidacese. 



Subclass 2. — Dicotyledons. Flowers usually on the plan of 5 or 4 

 leaves netted-veined ; cotyledons 2. 



Apetalous division. Flowers with no corolla, and sometianes with no calyx. 

 Flowers monoecious or dioecious, one or both kinds in aments. 



Staminate flowers in aments, the pistillate solitary or clustered. 



Leaves pinnately compound . . . . 21. Juglandacese. 



Leaves simple 25. Fagacese. 



Both staminate and pistillate flowers in aments. 



Leaves alternate. 



Fruits aggregated, fleshy 

 Fruit a drupe .... 

 Fruit a capsule, seeds comose 

 Fruit a nut or samara 

 Leaves opposite, parasitic shrubs 



27. MoraccEe. 



22. Myricacese. 



23. Salicacese. 



24. Betulacese. 

 29. Loranthacese. 



