138 DIPLOPERISTOMI. [Bait 



oma. 



nate steins of this plant. On the wilds of Dartmoor \ve have 

 gathered them eight or ten inches long, and in a fine state of 

 fructification. The extremities of the branches are slightly 

 incrassated; leaves imbricated on every side, concave, with a 

 reflexed margin. Those of the perichsetium are very convolute, 

 almost cuspidate, nerve short. 



2. A. viticulosum; leaves ovato-lanceolate obtuse entire the 

 nerve reaching to the point, fruitstalks very long, capsule 

 cylindrical. (TAB. XXII.) 



Anomodori viticulosum. Hooher and Tayl. Muse. Brit. ed. 1. p. 80. 

 Hook. FL Scot. P. II. p. 138. Hobson, Brit. Mosses, v. 2. n. 50. 

 Drummond, Muse. Scot. v. 1. n. 63. Am. Disp. Muse. p. 53. 

 Schwaegr. Suppl v. 1. P. II. p. 149. 



Neckera viticulosa. Hedw. Sp. Muse. t. 48. f. 4 8. Turn. Muse. 

 Hib. p. 103. Moug. et Nestl. n. 237. Funck, Deutschl. Moose, t. 3-1. 

 / 4. Brid. Meth. p. 138. 



Hypnum viticulosum. Linn. Sp. PI. p. 1592. Smith, Fl. Brit. p. 

 1275. Engl. Bot. t. 265 Dili. Muse. t. 39. f. 43. 



HAB. Upon trees and rocks ; less frequently on the 



ground. 



Stems creeping ; branches erect, numerous. Leaves imbri- 

 cated on all sides of the stem, erect, patent, somewhat undulate, 

 of a thick and soft texture, of a pale green colour, very yellow 

 when old. Perichsetium small ; its leaves narrower, and more 

 concave than the rest; nerve strong. Fruitstalks an inch or 

 more in length. Capsule cylindrical ; lid rostrate. 



XXVIII. DALTONIA. 



GEN. CHAR. Fruitstalks lateral ; Peristome double, con- 

 sisting of 16 teeth, with a ciliary process arising from 

 the side of each ; Calyptra mitriform. (TAB. III.) 



The mitriform calyptra separates this new genus from the pre- 

 ceding, with which the peristome well accords, so that they bear 

 the same relation to each other as Hookcria does to Hypnum. 

 With much pleasure we here offer our tribute of affectionate re- 



