56 



PLANT LIFE. 



Fig 68 —Transverse section of the stem of Bryum roseum. In the center the 

 small cells make a central strand, the "conductmi; tissue ' ; the surface cells form 

 an epidermis- the next three rows within also have thick walls and strengthen the 

 stem- w, rhizoids arising from epidermis. Magnified 50 diam.— After Sachs. 





Fig. 



Fig. 



Fig, 69.~-4, leaf nf a moss ( h'u-naria A »!t.'j-!\-,i )!,i\, showiriv; CLMitral r'lli. I\Ia,c;nified 

 about 40 diam.; A', upper prirtion rif the sanit- le;it, hiLihly mav;niric(l, showin.c 

 single layer of cells forminj.; the hladf and tlu- uarrowt-r cells of the thick rih.— 

 After Sullivant. 



Fig, 70 —Tip of leaf of a umss {Olii:ot r icJi inn nl !;;cyii iii\. showin^^ the thickened 

 rib, and the plate like rid'^es nn blade and rib >,'reatly inereasini; the surface' of 

 nqtrici\x tissue. Magnified ahi.ut 7^ diam. — A frer Sulliwint, 



