15 



Anthers distinct. Stigma single, but sometimes two lobed. 18 

 Anthers united into a tube. Flowers compound, consisting of many 

 florets, contained within a common, calyx-like involucrum. 



Stigma two cleft. Ovule erect from the base of the carpel. 



COMPOSITE, p. 179. 

 Stigma undivided. Ovule hanging from the apex of the carpel. 



CALYOERACE.*:. 



18. Fruit a utricle crowned with the adherent calyx, and inclosed by 

 an involucel. Mostly herbs. Stamens usually four. 



DIPSACACE.*;. p. 178. 



Fruit a berry, with an involucel. Evergreen shrubs, mostly para- 

 sitic. LORANTHACE.K. p. 292. 



19. Leaves without stipules. 20 

 Leaves with stipules, or tendrils. 



Stipules between opposite petioles. CINCHONACE.K. p. 173. 

 Stipules assuming the form of tendrils. Leaves alternate, rough. 



CuCURBITAfE.K p. 158. 



20. Anthers united into a somewhat curved tube. Juice usually milky. 



Stamens five. LOBELIAOE/K. p. 208. 

 Anthers distinct. 



Stamens more than two. 21 

 Stamens two or one. 



Stamens inserted on the tube of the corolla. Tropical trees or 



shrubs. COLUMELLIACE.S:. 

 Stamens two. Filaments adhering to the style. STYLIDIACE K. 



21. Anthers opening by pores at the apex. VACCINNIACEJ*:. p. 211. 

 Anthers opening by a slit lengthwise. 



Stigma surrounded by a peculiar covering or envelope. 



GOODENIACE.K. 



Stigma without a covering. 



