Scrophulariaceae. 



457 



According to the same author, the Geographical Di- 

 stribution of P. capitata is as follows: North-western Green- 

 land, Arctic American Archipelago, Arctic America, Una- 

 laschka, East-Arctic Siberia to Taimyr Peninsula, and Kam- 

 schatka. 



Anatomy. The Root: The structure of evidently full- 



Fig. 35. Pedicularis capitata. 

 A, Portion of a transverse section of root. B, Transverse section of 

 a runner, diagrammatic, cf. text. C, The peripheral layers of a runner 

 in transverse section, showing the cork-formation. D, Two non-glan- 

 dular hairs from the lower surface of the leaf. E, Transverse section 

 of leaf. ( Л and С about 220/^ ; в about ^ Vi ; ^> about 1*0/1 ; E about ""/i.) 



grown adventitious roots, about 0.5 mm thick, was as fol- 

 lows: The epidermis appears to die away rather quickly; 

 the cells in the outermost layer of the cortex have cuticular- 

 ised outer and lateral walls; the cells under the exodermis 

 were frequently divided by a thin tangential wall. The 



