ANALYTICAL KEY. Xlll 



Ovary 4-lobed, forming 4 separate or separable seed- 

 like nutlets. BORRAGINACEJE, 53 



Ovary single and entire. 



Style 3-cleft at apex : capsule 3-celled : corolla 



convolute POLEMONIACE.E, 51 



Styles or stigmas 2 or 1 . 

 Ovules and seeds at most 4, large, with large embryo and 



little or no albumen : peduncles axillary. CONVOLVULACE.E, 54 

 Ovules few or numerous : embryo small, in albumen. 

 Leaves all opposite or whorl ed and entire : capsule 



1-celled : corolla convolute. . . GENTIANACE.E, 50 

 Leaves various, mainly alternate. 



Styles 2 (or 1 and 2-cleft) : capsule 1 to 2- 



celled HYDROPIIYLLACE.E, 52 



Style 1 : stigma usually 1 : capsule or berry 



2-celled, rarely more SOLANACE^:, 55 



See also Limosclla, in ... SCROPHULARIACE.E, 56 



H_ H_ Corolla irregular: stamens (with anthers) 4 and didynamous, or 2: style 1. 

 Ovary and capsule 2-celled : seeds small, mostly indefi- 

 nite SCROPHULARIACE^), 56 



Ovary and capsule 1-celled, with many-seeded placentas 



in the axis LENTIBULARIACE^E, 58 



Ovary 4-parted, in fruit as many seed-like nutlets. . . LABIATE, 60 

 Ovary undivided : fruit splitting into 2 or 4 one-seeded 



nutlets. VERBENACE.E, 59 



DIVISION III. APETAL^E. Corolla (and sometimes calyx) wanting. 

 A Flowers not in aments. 



1. Ovary and fruit superior, l-celled and l-ovuled, or carpels distinct if more 



than one. 



Stipules sheathing the stem at the nodes. . . . POLYGONACE^J, 66 

 Stipules not sheathing the stern or none. 

 Shrubs or trees. 

 Leaves alternate : flowers perfect : fruit a tailed akene. 



Cercocarpus, in ROSACEJE, 26 



Leaves alternate : flowers unisexual : fruit a utricle. CHENOPODIACE^E, 65 

 Leaves opposite. 



Fruit an akene : leaves small and narrow. Coleogyne, in ROSACES, 26 

 Fruit a simple samara : leaves pinnate. Fraxinus, in OLEACE.-E, 47 

 Herbaceous, or sometimes woody at base. 



Fruit a utricle : seed lenticular : embryo annular or spiral. 

 Flowers with scarious persistent sepals and bracts : no 



stipules AMARANTACE^E, 64 



