DICOTYLEDONS.- ULM\CE1E. UlmilS. 1201 



1. A. glutinosa, leaves roundish cuneiform obtuse lobed at the 

 margin and serrated somewhat glutinous downy in the axils of 

 the leaves beneath, p. 27 1 . Bogs. 

 4. BETULA. 



Moncecious. Catkins cylindrical. Barren PI. ternate upon the 

 scale. Perianth 0. Slam. 810, Fertile Ft ,cale of the 

 catkin imperfectly 3-lobed, 3-flowered. Periantii 0. Styles 

 2. Ovaries compressed, 2-celled, 1 abortive. Nuts com- 

 pressed, with a membranaceous margin, 1 -seeded. 



1. B. alba, leaves ovato-deltoid acute doubly serrated glabrous. 

 , p. 274. Woods. 



2. B. nana, leaves orbicular crenate. p. 274. Alpine logs. 



5. MYRICA*. 



Dioecious. Catkins ovate a their scales lunulate. Barren Fl. 

 Slam. 4 6. Anthers4-va\ved. Fertile Fl. Ovary 1 . Stig- 

 mas 2. Drupe 1 -celled, 1 -seeded. Decand. 



1. M. Gale, leaves lanceolate broader upwards serrated, stem 

 shrubby, p. 288. Marshes and wet moors. 



ORDER IV. ULMAGE^E. MirbeL 



Flowers perfect, or imperfect by abortion. Perianth single, 

 bearing the stam., free, 4 6-toothed. Stam.4 6. Ovary 

 1. Styles 2. Stigmas double. Ackemum or Drupe \ seeded. 

 Seed pendulous, with or without albumen. Embryo straight 

 or rolled up.. Radicle superior. 



Trees or Shrubs .Leaves simple, rough, alternate, with stipules. 

 Flowers axillary. MirbeL 



1. ULMUS. 



Perianth persistent, 4 6-cleft. Fruit membranous, compress- 

 ed, 1 -seeded. 



1. U. campestriSj leaves doubly serrated scabrous unequal at the 

 base, flowers nearly sessile 4-cleft, with 4 stain., fruit oblong 

 naked, p. 85. Woods and hedges. 



2. U. glabra, leaves doubly serrated smooth unequal at the base, 

 flowers nearly sessile 5-cleft, fruit obovate naked cloven, p. 85. 

 Woods and hedges. 



H. U. montana, leaves doubly serrated pointed rough unequal at 

 the base, flowers on short stalks effuse 5 6-cleft with 5 6 

 stam., fruit roundish naked, p. 85. Woods. 



Tl^is genus is considered the type of the order Myriccce by M. Richard. 



