SERVICE TREE 



207 



Venation pinnate, pseudo-palmate at the base, with 

 about 6 (5 8) pairs of prominent and distant secondaries, 

 of which the lower curve out; all ending in the pointed 

 apex of the lobes, or the upper in teeth, without forking. 



Fig. 63. Service Tree, Pyrus torminalis. Venation pinnate with 

 pseudo-palmate base, a midrib ; b secondary ; c basal secondary coming 

 off as if a primary in palmate venation ; d outer branches of basal ; 

 e network formed by tertiaries and terminals, p. 205 (Ett). 



Tertiaries mostly strong and pinnately diverging at acute 

 angles on the middle and lower secondaries, somewhat 

 distant, and very distinct on the basal pair ; less so and 

 tending to join as cross-ties above. Network very distinct 

 though fine. 



Lobes ovate or rounded-triangular, and 

 sinuate-dentate ; not sharply 



triangular and serrate. 



