1909.]. STRAND PLANTS OF NEW JERSEY. 85 



the stomata found near the bottom of the grooves have their guard 

 cells depressed below the surface (Fig. 21a). Bulliform cells are 

 absent. The chlorenchyma is radially arranged on each side of the 

 bundles, while the parenchyma sheath surrounding the bundles also 

 contains some chlorophyll. 



Disti chits spicata (Plate V, Fig. 22). — The spike grass, or alkali 

 grass, occurs in the salt marshes along our eastern coast from Nova 

 Scotia to Texas, along the Pacific coast and in alkaline soil through 

 the interior to the Rocky Mountains and southward in alkali sinks 

 into Mexico. The culms are 1.5-6 dm. high and the leaf blades are 

 often conspicuously distichous, rigidly ascending. The lower epi- 

 dermis consists of thick-walled cells, the outer wall being especially 

 thick. The upper epidermis consists of projecting hair cells with 

 thick walls resembling in shape a canine tooth and found covering 

 the ridges down into the grooves between, so that an air-still chamber 

 is formed. The bundles are surrounded with thick-walled cells, 

 which are in turn engirdled by a parenchyma sheath, while the rest 

 of the leaf section is occupied by chlorenchyma. 



Tissa marina (=Buda marina, Spergularia salina, Spergularia 

 marina) (Plate V, Figs. 23 and 23a). — The sand spurrey is a much- 

 branched, procumbent, or suberect, annual herb more or less dis- 

 tinctly fleshy. The leaves are linear and terete surrounded with 

 large, thin-walled, epidermal cells with several rows of palisade 

 parenchyma directly beneath and completely surrounding the large 

 thin-walled parenchyma cells of the interior. The stomata are de- 

 pressed below the surface (Fig. 23a). A typic, succulent diplophyll. 



Plantago niaritiiiia (=P. decipiens) (Plate V, Figs. 24 and 

 240). — The seaside plantain has linear to nearly filiform leaves i-io 

 mm. broad, indistinctly ribbed and fleshy. The epidermal cells are 

 large thin-walled with the outer wall slightly thickened with minute 

 projecting points. Palisade cells are entirely absent and large 

 parenchyma cells with chlorophyll fill the interior, extending to the 

 bundles placed near the center. The stomata are not depressed, or 

 only slightly so (Fig. 24a). 



Aster snbulatus (Plate V, Figs. 25 and 2^0). ■ — The leaves of 

 the salt marsh aster are linear-lanceolate and pointed. The upper 



