GORSE. LABURNUM. SUMACH 285 



Primary leaves gradually passing into 



Ulex europceus. Gorse (Fig. 173). 



Primary leaves never becoming spines. 

 r~l Cotyledons 14 18 mm. x 8 10 mm.; 

 primary leaf very regularly trifoliate, 

 silky. 



Cytisus Laburnum. Laburnum. 



EU EH Cotyledons^ 10 mm. x 3 ^mm.; primary 

 leaf very irregularly trifoliate and glan- 

 dular. 



Rhus typhina. Sumach (Fig. 174). 



Fig. 174. Rhus typhina, Sumach (E.D.). 



ft Primary leaves glabrous or nearly so. 

 Primary leaves sub-opposite; each having 

 one large and two small acute or acuminate 

 leaflets. 



Ailanihus glandulosa. Tree of Heaven (Fig. 175). 



First leaf sub-rotund, simple; the second 

 having three obtuse- lea/lets. 



