Pterooouium.] MUSCI-PLEUROCARPI-PERISTOMI. 69 



lid with a long oblique subulate beak. — Gumnostomum cestieum, 

 Hedia. Sp. Muse. p. 32. t. 11. / 4—7. Sohwaegr. Suppl. v. 1. 



p. 30. Hobs. Br. Mosses, v. 2. n. 6. Drum. Muse. Scot. v. 2. 

 n. 5. Muse. Brit. ed. 2. p. 18. t. 6.— G. lutcolum, E. Bot. £.20. 

 (not of Fl. Brit, according to Mr. Varies specimens) — Anic- 

 tangium compaction, Schwaegr. Suppl. v. 1. p. 36. t. 11. 



Wet rocks, especially near water-falls, frequent. Ft. Sept.— The 

 fructification of this is truly lateral, as my friend Mr. Wilson has satisfied 

 me; and along with the Gymnnstomum 1 Hornschuchi anion of the Bry<d<>- 

 gia Germanica, to which it is closely allied (differing in its much shorter 

 leaves), it must be removed from Gymnostomum. The Genus Hedurigia 

 was established by Ehrhart (and adopted by lledwig himself) upon the 

 present Anictangium ciliatum ; a plant with which ours has been united 

 generically, by succeeding Botanists, who have, nevertheless, without 

 sufficient reason, deprived our great Muscologist of a name among 

 Mosses, suffered the plant to merge into Gymnostomum, or formed of it 

 the Genus Anictangium, and allowed a phacnogamous plant to usurp the 

 appellation. I have ventured to separate a groupe from Anictangium in 

 the Musci Exotici, in HumboWi Nova Genera, and in the Muse. Brit., 

 which will include the present plant : and this arrangement has alreadj 

 been sanctioned by the Authors of the Dictionnaire Classique d'Hist. 

 Nat. and by Schwaegrichen in the 2d and 3d Supplements to his Species 

 J\Iuscorum. 



Subsect. II. Mouth of the capsule furnished with a peristome. 

 Peristo.mi. 



Div. I. Peristome single. AplOPERISTOMI. 



32. Pterogoxium. Sw. Pterogonium. 



St fa lateral. Peristome single, of 16 entire, equidistant teeth. 

 Caluptra dimidiate. (Muse Brit. t. 2.) — Name; *«?£«», a wing, 



ami yoK?. a shoot : signifying winged shoots or branches. 



1. P. Smithii, Sw. (curled Pterogonium); >tem> much branched, 

 branches pinnate, leaves Ungulate oUtu^' entire crisped when 

 dry their margins recurved, the nerve reaching about half-way 

 up. seta very short, lid rostrate. Sw, in SchreuL Joum. v. 2. 

 p. 173. PI. Brit. p. 1271. /•:. Bot t. 1826. Schwaegr, Suppl 



r. \. p. 105, and r. 2. p. A\.t. L09. Hob». Br. Mottet, r. 2. //. 2."). 



Mute. lint. at. -J. j>. 7-t. /. 14. — Hypnum SmithO, Dicks. Or. 

 Fasc.2. p. lo. /. 5, /'. 1. Hedw. Sp. Mute. p. 264. U 68, 

 / 5—7. 



Trunka «>t trees in the south of England. Fr. 8pnn«.— Stent very 

 much branched, branches pinnated, much curled, as arc the leaves when 

 dry. The fruit, which is not commonly produced, is nearlj sessile, the 

 it in slightlj curved. 



2. P. gnirili. Sw. ( $h n A t Pterogotuum); branches fascicled 

 curved, leaves broadly ovate acute oonoave their margini plane 

 the summits serrated fainth 2-nerved ;ii the base, lid conical. 

 Sw. Mute, Suec. />. 26. Fi. Brit. p. 1270, / Bot. U 1085, 



// // II,'. .[,, ., i x,.i .u.i hen, 



