36 U/maceae, Cannabaceae 



Tribe i. Fageae. ^ catkins globose. Two angular 

 nuts in each cupule. 



Only British genus : Fagus. 



Tribe 2. Castaneae. ^ catkins elongate. Ntits 

 rounded. 



^ catkins erect. Nuts 3, enclosed in spinous cupule. 



©Castanea. 

 ^ catkins pendulous. Nut single, exserted. Quercus. 



Order 5. Urticales. Herbs, shrubs or trees 

 with stipulate, often roughly hairy, leaves. Inflorescence 

 mostly cymose, but catkins still occur {Urticd). Flowers 

 cyclic, homochlamydeous, rarely naked. Stamens oppo- 

 site the tepals. Cai^pels 2-1, superior. Ovary usually 

 i-locular, with one ovule with two integuments. 



Fam. I. Ulmaceae. Woody plants without latex. 

 Leaves often distichous, simple, oblique at base, strongly 

 pinnately nerved, serrate, with rough hairs and deciduous 

 stipules. Flowers mostly hermaphrodite. Perianth 

 4-5-lobed. Stamens as many. Filaments straight in 

 bud. Carpels (2). Styles 2. Ovule usually solitary, 

 pendulous and anatropous. Fruit a nut or drupe. 

 Endosperm usually o. 



Subfamily Uhnoideae. Flowers in clusters. Pedun- 

 cles in the axils of scales. Fruit never drupaceous. 

 Embryo straight. 



Only British genus (fruit broadly winged) : Ulmus. 



Fam. 2. Cannabaceae. Aromatic herbs without 

 latex. Leaves palmately nerved, and lobed or divided. 

 Stipules persistent. Flowers dioecious. ^T flowers, tepals 5, 

 stamens 5. $ floivers with perianth of low entire mar- 



