HOOKERIA. 225 



said to have been gathered by J\Ir. Dickson, in " alpine 

 rivulets, Scotland," is quite an American plant. It is sup- 

 posed that the plant found by Dickson was IVehsia acuta, 

 growing in water, and lengthened out by that process. 



HOOIvEKIA, Sm. (Hookeria.) 



A genus consisting of large and beautiful mosses, as may 

 be inferred from its including a "gitjanfea" and " sj}lendi- 

 dissima" among its foreign relations. 



Named in honour of Sir W. J. Hooker, to whom British 

 Muscologists are much indebted for the zeal and ability 

 with which he has investigated this and other portions of 

 the riora of our own and other lands. The circumstance of 

 this minute moss bearing his honoured name, reminds one 

 of the graceful woodland Llnnaa, dedicated to another ho- 

 tanicorum jorinceps. 



Generic Character. — Seta lateral. Peristome double ; tlie 

 outer of sixteen teeth, the inner of sixteen cilia, united below 

 into a membrane. 



1. HooKERiA LUCEXS, Sm. {SJdning Hool'eria.) Leaves 



bifarious, broadly ovate, entire, obtuse, nerveless. — Eng. FL 



p. 74. Mm. Syn.pL 2.^;. 201. 



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