Neckera.] DIPLOPERISTOM1. 135 



any Muscologist who has not kept it distinct. The habit of the 

 British species approaches very nearly to that of Hypnum tri- 

 chomanoides, and H. complanatum. Like them, the leaves are 

 bifai'ious and distichous. 



1. ^V. pumila; leaves bifarious ovato-acummate slightly concave 



their margins recurved, fruitstalks scarcely longer than the 

 perichsetial leaves, capsule oblongo-ovate. (TAB. XXII.) 



Neckera pumila. Hedw. St. Cr. v. 3. t. 20, Smith, Fl. Brit. p. 

 1272. Engl Bot. t. 1443. Brid. Meth. p. 137. Moug. et Nesll. n. 

 429. Schwaegr. Suppl. v. 1. P. II. p. 147. Hook. Fl. Scot. P. II. 

 p. 138. Arn. Disp. Muse. p. 52. 



Hypnum pennatum. Dicks. 



Fontinalis pennata. Huds. 



HAB. Woods in Sussex. Very abundant in the New 

 Forest, Hants. At Inverary and Cliesh, plentiful, but 

 generally speaking, rare in Scotland. 



This plant, which is always found upon trees, has been, till 

 lately, supposed peculiar to the British Isles ; but it has now 

 been discovered in France, in Switzerland, and Lapland. As 

 to size, it is but one third so large as N. crispa, and much 

 branched in a pinnated manner, and so strongly resembling 

 Hypnum complanatum, that we have received this latter moss 

 with the name of our Neckera from various correspondents. 

 The leaves, however, under a microscope, will be found of a 

 different figure, and they are slightly undulate, especially when 

 dry. The perichsetial leaves are long, very convolute, ovate, 

 much acuminated, and the fruitstalks are but in a slight degree 

 exserted beyond them. The capsules are ovate, a little in- 

 clining to cylindrical. Neckera pennata, which, though ex- 

 tremely scarce in Britain, is much more abundant on the Con- 

 tinent than N. pumila, may be discriminated by its larger size, 

 longer and more plane leaves, and above all, by its nearly 

 sessile, and wholly immersed capsules. 



2. N. pennata ; leaves bifarious ovato-lanceolate acuminate plane, 



fruitstalk none, capsule oblong immersed in the perichaetial 

 leaves. (SUPPL. TAB. IV.) 



Neckera pennata. Hedw. St. Cr. v. 3. t. 19. Schwaegr. Suppl. v. 

 1. P. II. p. 144. Moiig. et Nestl. n. 146. Funck, Deutschl Moose, t. 



