18 KEY TO NATIKAL ORDERS. 



2. Corolla nearly or quite regular. ^^^^ 



Stamens as many as the petals and opposite them. 

 Pistil and stjde 1 i^the latter sometimes cleft at 

 the summit). 



Anthers opening by uplifted valves. Berberidace.e, 36 



Anthers opening lengthwise. 



Woody vines. Calyx minute ; petals 



falling very early. Vitacke, 8 1 



Shrubs. Calyx larger, its divisions 4-5. Rhamnace.^:, 85 

 Herbs. Sepals 2 : petals 5 : stigmas 3. Poetdlacace^ 62 

 Stamens as many as the petals and alternate with 

 them, or twice as many, or of some unequal 

 number. 



Calyx-tube adhering to the surface of the ovary. 

 Stamens more or less united with each 



other. Flowers monoecious. Cucuebitace^, 138 



Stamens distinct, as many or twice as 

 many as the petals. 



Seeds many in a 1-celled berry. 



Shrubs. Grossulace^ 136 



Seeds many, in a 2-celled or 1-celled 



pod. Styles 2. Saxipragace^ 143 



Seeds many, in a 4-celled pod. Style 



1 : stigmas 4. Onagrace^ 135 



Seeds only 1 in each cell. Border 

 of cah'x obscure. 

 Flowers in small axillary clus- 

 ters. Pod 2-beaked. Shrubs 



or trees. Hamamelace^ 144 



Stjdes 2 : fruit dry. Herbs 

 with flowers in compound 



umbels. Uiibellifer^, 145 



Styles 3-5 (rarely 2) ; fruit a 

 berry. Shrubs or herbs, with 

 flowers in simple or panicled 



umbels. Araliace^ 155 



Style 1. Flowers in cymes or 

 clustered in heads, sometimes 



surrounded by an involucre. Cornace^, 157 

 Calyx free from the ovary, at least from the fruit. 

 Leaves with transparent or blackish dots. 



Leaves simple, entire and opposite. Hypericace.e, 54 

 Leaves com.pound or divided. Rutace^ 74 



Leaves without transparent dots. 



Pistils more than one. Leaves with 



stipules. ROSACE.E, 1 1 2 



Pistils 2, nearly distinct. Stipules 



none. Saxifragace^, 143 



Pistil 1, simple, 1-celled: style and 



stigma 1. LEGUiUNOS^E, 93 



