18 



KEY TO XATUEAL OEDEES. 



2. Corolla nearly or quite regular. 



glamens as many as the petals and opposite tliem. 

 Pistil and style 1 (the latter sometimes cleft at 

 the summit). 



Anthers oponing by uplifted valves. Berbeeidace^, 36 



Anthers opening- lengthwise. 



Woody vines. Calj'-x minute ; petals 



falling very early. Yitace^. SI 



Shrubs. Calyx larger, its divisions 4-5. RHAm^ACEJE, 85 

 Herbs. Sepals 2 : petals 5 : stigmas 3. Portulacace^, 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 ovaiy. 

 Stamens more or less united with each 



other. Flowers monoecious. Cucurbitace^, 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. Saxifragace^, 143 



Seeds many, in a 4-celled pod. Style 



1 : stigmas 4, Oxagrace^ 135 



Seeds only 1 in each cell. Border 

 of calyx obscure, 

 riowers in small axillary clus- 

 ters. Pod 2-beaked. Shrubs 



or trees. Hamamelace^, 144 



Styles 2: fruit dry. Herbs 

 with flowers in cora]pound 



umbels. Uitbellifer^, 145 



Styles 3-5 (rarely 2) ; fruit a 

 berry. Shrubs or herbs, with 

 flowers in simple or panicled 



umbels. Araliace^, 1 55 



Style 1. Flowers in cjanes or 

 clustered in heads, sometimes 



surrounded by an involucre. Cornaceje, 157 

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

 Leaves with transparent or blackish dots. 



Leaves simple, entire and opposite. HtpericaCE^, 54 

 Leaves compound or divided. RuTACEiE, 74 



Leaves without transparent dots. 



Pistils more than one. Leaves with 



stipules. EOSACE.E, 1 1 2 



Pistils 2, nearly distinct. Stipules 



none. Saxifragace^, 143 



Pistil 1, simple, 1-celled: style and 



stigma 1. Leguminos^, 9? 



