00 SBA MOSSES. 



the commonest ]>Lints growing with the other 

 /Aimtnahra lluoughoul the season at Santa Cm/, 

 California. 



Genus. — A!. ARIA* Grei\ 



AmKIA KStlLKMA, CrKV. 



'ITie rtfiNf Ahina grows upon sul)merKe<! rocks 

 just U'hm- tide. It is a pLint whose jjeculiar asjKTt 

 inakcs it ver)- easy of recognition and quite im|>os- 

 sihle to confotmd with any other. Unlike any 

 other of the " Kel|>s/' except the Af^arum it has a 

 stoul midrib nmning the whole length of the plant. 

 This together with the little cluster of ribless leaflets 

 or wings, l)omc on each side of ihc stem, just 

 below the bbde, makes the plant al»solutely distinct 

 These leaflets bear the spores or fniit, and are 

 alwa)'s present except on young pLints. 'ITie plant 

 makes its anrhomgc u|)on the ro<:k by the same 

 means as the Laminarifir generally. The stem 

 is from three inches to a foot long, cylindrical. 'I"he 

 blade consists of a thin wavy, or niflfled olive 

 colored membrane, from one to four inches wide, 



