224 LABURNUM 



Pyrus Aria also tends to be slightly viscid at the tips 

 of the buds, which are stouter and more obtuse, with brown 

 borders and a few hairs on the margin of the green scales 

 (see p. 236). 



-^ -h Buds not viscid, or at least not 

 markedly or persistently so, and not 

 conical and long-pointed. Leaf- 

 scars small, semi-Innate or crescen- 

 tic, with 3 5 leaf-trace bundles. 



8 Bicds hairy with obvious silky 

 pubescence or cottony down. 



A Buds and shoots silky p)ubescent 

 with white hairs, not cottony or 

 tomentose; older twigs glabrous. 



^ Buds and greenish shoots xohite 

 vnth silky appressed hairs; 

 older twigs grey-green to olive; 

 lateral buds small, ovoid- 

 flattened, on prominent leaf- 

 bases on which the minute 

 stipules remain. Leaf-scar 

 semi-lunate vnth 3 leaf-trace 

 bundles. 



Cytisus Laburnum, L. Laburnum. Bud-scales few, 

 about 3, rather loose ; terminal bud surrounded by- 

 several leaf-bases bearing stipules; twigs olive-grey as 

 the papery epidermis sloughs off, the older smooth olive, 

 with small round lenticels. Most of the lateral buds are 

 aborted or give rise to short densely ringed dwarf-shoots, 

 whence the sparse branching ; pith round. Terminal bud 

 hardly larger than the laterals ; leaf-scar semi-lunate, 

 with 3 approximated leaf-traces. Twigs slightly angular 

 or striate, becoming smooth and grey-green with minute 

 lenticels. 



