298 



THE PLANT COVERING OF OCRACOKE ISLAND. 



1 wide layer beneatli the midvein, the latter separated from the lex)- 

 tome b}^ several layers of colorless parenchjnna. 

 Stereome, none. 



Chlorenchyma: Palisade a single laj^er of short cells, very compact; 



pneumatic tissue occupying the 

 rest of the leaf's thickness, also 

 rather compact. 



Physalis viscosa L. 



Leaf flat, thin, imperfectly bifa- 

 cial, gray-canescent or green (de- 

 pending upon the amount of 

 pubescence).^ 



Epidermis similar on both faces, 

 cell walls not thick, the radial un- 

 dulate ; cuticle above and beneath 

 the veins thick and warty; stomata 

 much more numerous on the dorsal 

 surface; hairs (fig. 45) about 

 equally numerous on both faces, 



Fig. i5.— Physalis viscosa— branched hair from thiu-walled with granular CUticle, 



leaf. Scale 240. cousisting of a uuicellular stalk 



bearing 3 or 4 (usually 3) conical, acute, unicellular or sometimes 

 bicellular arms, these in turn sometimes once-branched. 



Hypodermal colleiichy matte tissue above and beneath the veins. 



Stereome^ none. 



Chlorenchyma: Palisade and pneumatic tissue not well differen- 

 tiated, both compact. 



^ The individuals observed upon Ocracoke Islaad had greener, less pubesceut 

 leaves than at Cape Henry, Va. 



