INTllODUCTION. XXXIX 



Sepals very unequal. Stamens irregularly ~\ 



arranged upon a hypogynous disk. ^^^^ s^pi^i^^cE.*. 

 (Petals usually with some interior ap- i 

 pendage.) - - - -J 



Ovules definite, erect. 



Fruit dehiscent - - 98. Hippocastane^. 



Fruit indehiscent. 



Stamens distinct - - 101. Acerine.«. 



Stamens cohering at the base } ,j^ Hippocrateace^. 

 m a fleshy cup - - ) 

 Ovules definite, pendulous - - 68. Olacine^e. 



Ovarium 1 -celled, with a central 



columnar placenta. 

 Stamens monadelphous. Fruit ) ^^g. Polygale^. 



dehiscent - - j 



Stamens distinct. One of theK24. Trop^ole^. 

 sepals spurred - - j 



Ovules Indefinite ... 126. Balsamine.c 

 Flowers symmetrical. (That is, the segments 

 of the calyx, the petals, and the stamens, 

 regular multiples of each other.) Isomeria. 



Embryo coiled round mealy albumen - 140. CaryophyllEjE. 



Embryo straight, or a little curved ; albu. 

 men, if present, not mealy. 



Stamens combined in a long tube ; 

 anthers subsessile. 



Seeds definite, not winged ; } ^^^ Meliace.e. 



anthers all fertile • - S 



Seeds indefinite, winged ; an- } ^^^^ Cedrele.e. ' 

 thers partly sterile - j 



Stamens distinct, except at the base; 

 anthers with long filaments. 

 Seeds indefinite. 



Embryo minute, in fleshy ^21 Pittospore.e. 

 albumen - 5 



Embryo in the axis of fleshy ) ^^3. Oxalide^. 



albumen - - j 



Embryo destitute of albumen. 



Fruit drupaceous. Trees 95. Brexiace^. 

 Fruit capsular. Herbs - 143. Elatine^. 

 Seeds definite. 

 Ovarium deeply lobed, with the style arising from the base of ^ j^g Ochnace^. 



the carpella, which are seated on a succulent receptacle - 5 ' 

 Ovarium not seated on a succulent receptacle. 



Ovula erect ... - - 104. Vites. 



Ovula pendulous. 



One of the sepals spurred - - - 125. Hydrocere^. 



None of the sepals spurred. 

 Leaves with pellucid dots. 



Fruit succulent .... 108. Aurantiace^. 

 Fruit capsular or drupaceous. 



Flowers unisexual - - - - 114. Xanthoxyle^. 



Flowers hermaphrodite. 



Endocarp not separable from the sarcocarp 116. Ru tace je. 

 Endocarp separating from the sarcocarp as } ^j. Diosme^. 

 a 2-valved coccus - - i ' " 



Leaves without pellucid dots. 



Fruit 1-celled .... 102. Eryturoxyle.e. 



Fruit many-celled. 



Stamens arising from hypogynous scales. 



Leaves opposite, with stipulffi - - 119. Zygophylle.e. 



Leaves exstipulate - - - 120. Sijiarubace.b. 



Stamens immediately hypogynous. 



Cotyledons shrivelled - - 122. Geraniace^. 



Cotyledons flat. 



Styles distinct. Stigmas capitate - 139. LiKEiE. 

 Styles concrete, or nearly so. 



