78 HARSHBERGER— LEAF STRUCTURE OF [April 23. 



siibulatus, Suceda linearis, Gerardia maritima, Limonium caro- 

 linianum. 



Hypodermis Present : Spartina stricta maritima, Distichlis 

 spicata. 



Two or More Rows of Palisade Cells : Aster subulatus, Limon- 

 ium carolinianum, Gerardia maritima. Hibiscus moscheutos. 



Stomata Depressed : Spartina stricta maritima, Tissa marina, 

 Plantago maritima, Aster subulatus, Chenopodium rubrum. 



Hairy Leaf: Gerardia maritima, Hibiscus moscheutos, Pluchea 

 camphorata. 



Succulent Leaf : Tissa marina, Plantago maritima, Aster subu- 

 latus, SucEda linearis, Chenopodium rubrum, Limonium carolin- 

 ianum. 



Wiry Leaf : Spartina stricta maritima, Distichlis spicata, Ger- 

 ardia maritima. 



Leathery Leaf: Hibiscus moscheutos, Pluchea camphorata. 



Diphotophyll : Aster subulatus (drawing is upside down), 

 Limonium carolinianum, Gerardia maritima. Hibiscus moscheutos. 



Diplophyll : Tissa marina, Suceda linearis. 



Staurophyll : Chenopodium rubrum. 



Spongophyll : Plantago maritima, Pluchea camphorata. 



Detailed Srtucture of the Leaves. 



The sections of the leaves which were studied were made free- 

 hand with a razor, stained with Bismarck Brown and mounted for 

 permanency in Canada Balsam. The drawings of these sections 

 were made by the use of the micro-projection electric lantern, so 

 that in every case (32 leaves) the sections were enlarged to the 

 same extent and therefore the drawings were made on the same 

 scale. The details of leaf structure and those of the stomata were 

 made from a microscopic study after the main features of the 

 leaf structure had been located by the micro-projection lantern. In 

 this way the relative size of each leaf section is maintained in the 

 thirty-two detailed drawings presented in the accompanying two 

 plates (Plates IV and V). The drawings of stomata were not made 

 to scale. 



