IQI2] 



STARR— ANATOMY OF DUNE PLANTS 



293 



Herbs 



T... 



UE. 

 P... 



Sp. . 

 LE. 

 OW. 



Leaf 



M 



22 SP (230-296) 



25 = 



54 ■ 



10 per cent 



21 



158 =62 



18 



7 



2.4 



ASCLEPIAS SYRIACA 



Stem 



9 per cent 



272 M (237-304) 

 25 = 



77 = 



!5i = 

 19 = 



M 



X 



N 



25 



18 



D 46 m (66) 64 ix (87) 



28 



56 



7 



W 



F. 



3-5 

 2-9 



2.4 



L.. 



OW 



.... 17 



4 



Wood cyl 185 



4.6 



3-5 



IS 



6.4 

 611 



pidermal 



X. — Area of cross-sections of vessels 



cells plane, of lower wavy; cuticle ridged smaller, larger cylinder of wood formed; 

 on lower surface. X— Hairs on both walls of vessels and of fibers heavier, 

 surfaces (only on lower in M); upper lumen of fibers smaller, so more wood; 

 epidermal cells smaller in depth, larger outer wall of epidermis and hypodermal 

 in surface ; palisades often deep in pro- collenchyma heavier, 

 portion to sponge; where not, a secondary 

 palisade partly organized; conductive 

 and supporting tissues as usual; latex 

 and other secretions more abundant — 

 F igs. 34 and 35. 



SMILACINA STELLATA 



T 



UE.. 

 M... 



LE.. 

 OW.. 

 Cu.. 



Leaf 



M 



X 74M (155-199) 

 28 =16 per cent 

 119 =68 



27 



16 



2.6 



o-7 



Stem 



X 



202 fl (182-242) 

 30 =15 per cent 



144 =71 

 29 = 



M 



Bundles in field ..12 

 N in bundle 15 



14 



2.9 

 0.7 



D. 

 W 



OW 



27 m 



4-3 

 7.2 



X 



12 



13 



32 M 



4-5 



6.4 



X. Epidermal cells smaller in depth, X. — Area of cross-sections of vessels 



larger in surface; hairs more abundant, 

 more crystals deposited ; other variations 



greater; walls of vessels heavier, but 

 outer wall thinner. 



as usual; 

 the 



in both no differentiation in 



mesophyll, the general monocot 



situation; side walls of epidermal cells 

 plane. 



