1912] 



STARR— ANATOMY OF DUNE PLANTS 



277 



Trees 



T... 

 UE.. 

 P.... 



Sp.. . 

 LE.. 

 OW.. 

 Cu.. 







ACER SACCHARUM 







Leaf 







■ 



M 





X 





M 



75 M- (69-93) 





!°3 M (95-109) 



N. .. 



41 



10.5 =14 per cent 



13 =12 per cent 



D... 



36 



2 9-5 =39 





40 =39 



W... 



3 



29.0 =39 





40 =39 



F.... 



4-2 



6.0 = 8 





10 =10 



JL/« ■ . • 



6.2 



1.6 



1 "1 • 





3-5 



iv . . . 



3-5 



thin 





i-7 



v>« • • ■ 



80 



s.. 



• • 



64 



Stem 



«(5o) 



X 



33 



37 m(46) 



3-5 

 4-7 



8.5 

 2-4 



72 

 50 



X.— Hairs on lower surface ; upper In all points but the thickness of the 



epidermal cells smaller in depth, slightly walls of the vessels and the fibers, an 



larger in surface extent; outer wall and exception to the majority of cases 



cuticle thicker; sclerenchyma around the examined. 



midrib 



greater 



development of bundles; cuticle on 

 upper surface more strongly ridged. In 

 both stomata on lower surface only. 



T... 



UE.. 

 P.... 



Sp 



LE... 



Cu. 



• • 



Leaf 



M 



OS M (87-72) 



13 = 



14 = 



20 per cent 



22 



2 4 =37 

 14 = 



21 



OW... 0.7 



very thin 



CELTIS OCCIDENTALIS 



X 



I20M (104-I44) 



24 =20 percent 

 43 =36 

 40 =33 



13 



11 



3 



0.7 



Stem 



M 



N. . . 17 



X 



18. s 



D... 74 m(ioi) 74 n (120) 

 W... 2.4 



F. • . . 4-8 



Li. . . • 4 ■ O 



R. .. 7 



V^ . . . . ^\.<J 



S. . . . 64 



3-2 



6.4 

 32 



7 



32 

 80 



A.— -Large glandular cells frequently X— A straggling shrub, probably var. 



occupying the place of the epidermis and pumila; slightly greater development of 



pahsade; collenchyma below and scle- vessels with heavier walls; fibers heavier, 



renchyma above the midrib, where neither but fewer of them than in M, replaced by 

 appears in the mesophytic form; greater 

 development 



Figs. 4 and 5. 



of vascular elements. 



tracheids; cork thinner; more scleren- 

 chyma in the cortex. 



