GORSE. LABURNUM. SUMACH 



285 



© Primary leaves gradually passing into 

 spines. 

 JJlex europceus. Gorse (Fig. 173). 



©0 Primary leaves never becoming spines. 

 CJ Cotyledons 14—18 mm. x 8—10 mm.; 

 primary leaf very regularly trifoliate, 

 silky. 



Cytisus Laburnum. Laburnum. 



OO Cotyledonsb—lOmm. x ^—Amm.; primary 

 leaf very irregularly trifoliate and glan- 

 dular. 



Rhus typhina. Sumach (Fig. 174). 



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



+t Primary leaves glabrous or nearly so. 

 © Primary leaves sub-opposite ; each having 

 one large and two small acute or acuminate 

 leaflets, 



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



©® First leaf sub-rotund, simple; the second 

 having three obtuse leaflets. 



