34 My7'icaceae, Juglandaceae 



Leaves usually broad. Bracts laciniate. Perianth 

 cup-like or saucer-like, more or less oblique. Populus. 



Leaves usually narrow. Bracts entire. Perianth of 

 usually separate nectaries. Salix. 



Order 2. Myricales. Shrubs or trees. Leaves 

 alternate, simple, exstipulate, sweet scented. Flowers 

 achlamydeous, diclinous, monoecious or dioecious, some- 

 times with bracteoles at the base. Stamens usually 4. 

 Carpels (2). Ovary i-locular with one basal ortho- 

 tropous ovule with one integument. Styles 2, filiform. 

 Fruit a drupe with waxy surface often adnate to 

 bracteoles. Seeds without endosperm. 



Fam. Myricaceae. 



Only British genus : Myrica. 



Order 3. *Juglandales. Trees with alternate, ex- 

 stipulate, pinnate leaves. Flowers diclinous, monoecious, 

 achlamydeous or haplochlamydeous. Stamens 3-40. 

 Carpels (2). Ovary inferior, i-locular with one basal, 

 orthotropous ovule with one integument. Fruit a drupe 

 or nut with adherent bracts. Endosperm o. 



Fam. *JUGLANDACEAE. $ flower with perianth 

 which is fused with the ovary and also with the bract 

 and bracteoles. 



*Juglans. 



Order 4. Fagales. Trees or shrubs. Leaves alter- 

 nate, simple, with stipular, usually caducous bud-scales. 

 Flowers homochlamydeous or achlamydeous, mostly 

 diclinous and monoecious. ^ flowers in catkins. % 

 flowers in catkins or small spikes, or 1-3 seated in an 

 involucre of free or connate bracts. Stamens often 



