igi2] 



STARR— ANATOMY OF DUNE PLANTS 



291 



RHUS TOXICODENDRON 



Leaf 



M 



T 79 /* (73-ii6) 



Stem 



UE. 

 P... 



X 



140/* (123-198) 



9 =n per cent 

 S =33 



12 



9 per cent 



10 



Sp 37 =46 



LE.. 

 OW. 

 Cu. . 



45 =32 

 70 =56 



. 8 = 

 1.9 

 .thin 



12 



9 



2.7 



i-4 



N. 

 D. 

 W. 

 F.. 



L.. 



R. 



C. 



M 



35-5 



X 



18.5 



85 A* (99) 69 m(88) 



2.4 

 9.6 



2-4 



2.8 

 7.2 



183 



3 

 MS 



X.— Epidermal cells smaller in depth; Exceptional but in the mass of wood 



occasional indications of a double pali- formed. 



sade; other points as usual.— Figs. 32 

 and 33. 



32 



33 



Figs. 32-33. — Rhus toxicodendron: sections of leaves; fig. 32, mesophytic form; 

 %• 33, dune form. 



