Hookeria.-] D I P L O PER I S T O M I. 149 



XXXII. HOOKERIA. (Smith, not Schrvaegrichen.) 



GEN. CHAR. Fruitstalks lateral ; Peristome double ; the ex- 

 terior of 16 teeth, the interior of a membrane divided 

 into 16 entire segments ; Calyptra mitriform. (TAB. 



in.) 



The only two British individuals of this genus have a peculiarity 

 in their habit, in their plane surculi, and bifarious succulent leaves, 

 which seem in themselves to point out a family different from 

 Hypnum and Leskea, with which they have been hitherto united ; 

 and the mitriform calyptra affords a character which we consider 

 of the highest importance. We are acquainted with several 

 exotic species, which agree with them in all these particulars.* 



1. H. lucens ; leaves broadly ovate entire obtuse nerveless. 



(TAB. XXVII.) 



Hookeria lucens. Smith t in Linn. Trans, v. 9. p. 276. Engl Bot. 

 t. 1902. Hook. Fl. Scot. P. II. p. 141. Hobson, Brit. Mosses, v. 1. 

 n. 63. Drummond, Muse. Scot. v. 2. n. 61. Hook, and Grev. in Edin. 

 Journ. of Science, v. 2. p. 225. Arn. Disp. Muse. p. 56. 



Hypnum lucens. Linn. Sp. PI. p. 1589. Hedw. Sp. Muse. p. 

 243. Turn. Muse. Hib. p. 155. Moug. et Nestl. n. 40. Smith, FL 

 Brit. p. 1295. 



Leskea lucens. Decand. Fl. Gall. Syn. Schwaegr. Suppl. v. 1. P. 

 II. p. 164. t. 84. Funck, Deutschl Moose, t. 35. / 3. 

 Pterigophyllum lucens. Brid. Meth. p. 149. 

 HAB. Moist banks in woods and among rocks. 

 Stems procumbent, from two to four inches long ; slightly 

 branched, plane. Leaves arranged on four sides, but bifarious 

 in their direction, quite plane, of a very succulent .texture, re- 

 ticulated, with the meshes large, the margin not thickened, 

 nerve none. From the points of the leaves, roots are often 

 emitted. Fruitstalks about an inch long, curved at the sum- 

 mit. Capsules ovate, horizontal, reticulated ; lid conico- 

 rostrate. Calyptra thin, whitish, faintly reticulated, mitriform, 

 jagged at the base. Peristome exactly as in the Hedwigian 

 genus Leskea, and as represented by Schwaegrichen and Smith. 



2. H. Icete-virens ; leaves ovate acuminulate margined very obscurely 



* See Hooker and Greville in the Second Volume of Brewster's Edinburgh 

 Journal of Science, p. 221. for further remarks upon this genus. 



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