Orikotrickum.] 



MUSCI-ACROCARPI-PERISTOMI. 53 



Mr. Templeton. Frequent in Ireland on the Hasel, and sometimes on 

 the Ash: also in Angles ea, Wilson. Near Manchester, Mr. Hobson. Fr. 



j an< — Xhis plant grows in small lax tufts: the stems nearly half an inch 

 high. Leaves erecto-patent, between ovate and lanceolate, plane or 

 slightly keeled, entire, dotted as in Gymnostomum viridissimum, the 

 nerve reaching to the point. Capsule narrow, obovate, striated. Lid ros- 

 trate. — The Rev. Colin Smith showed me this plant in great abundance 

 upon trees at Inverary, growing with Gymnostomum viridissimum. 



26. Orthotrichum. Hedw. Bristle-Moss. 



Seta terminal. Peristome mostly double: the outer of 16 

 teeth approaching in pairs; the inner of as many cilia lying 

 horizontally (sometimes wanting). Calyptra mitriform, sulcate, 

 more or less hairy, (dlusc. Brit. t. 2.) — Name, ogdog, straight, 

 and Sg/g, a hair; from the circumstance of the calyptra being 

 generally clothed with hairs. — This is a very peculiar and natu- 

 ral genus, yet very difficult to he defined by words, on account 

 of the varied nature of the peristome : and, in almost all, the 

 leaves are so similar, that except hy the fruit the species are 

 scarcely distinguishable. 



* Peristome single. 



f Capsule immersed. 



1. O. cupuhitum, Hoffm. {single-fringed sessile-fruited Bristle- 

 Moss); leaves ovato-lanceolate erecto-patent, when dry erect 

 straight rigid, capsule nearly sessile furrowed for its whole 

 length, calyptra somewhat hairy at length quite glabrous. 

 Hoffm. Germ. v. 2. p. 26. Schwaegr. Suppl. v. 1. P. 1L p. 35. 

 /. 55. Drum. Muse. Scot. v. 2. //. 51. Muse. Brit. erf. 2. p. 125. 

 /. -21.-0. anomalum, Fl. Brit. p. 1267. E. Bot.t. 142:5. — 

 0. nudum, Fl. Brit. p. 1268. E. Bot. t. 1325 — O. strangula- 

 i a in. Beauv. — Schwaegr. Suppl. r. 2. p. 33. /. 54. 



Rocks and trunks of trees. Fr. Apr.— Plant of a rigid habit, dark 

 colour and scarcely exceeding an inch in height ; the leaves are remark- 

 ably straight, obtuse, with a Strong and reddish ncrce. Capsule deeply 

 furrowed. Calyptra very slightly hairy. 



\\ Capsule < i si rti.l. 



2. O. anSmalum, Hedw. (anomalous Bristle-mass); ste 

 erect, leaves ovato-lanceolate erecto-patenl straight when d 

 teeth 8 geminate, calyptra slightly hairy. Hedw. St. Cr. v. ~ 

 U 37. Turn. Muse, fftft, p. 94. Schwaegr. Suppl. v. I. P. II. 

 p. :)7. Dram. Muse. Scot v. 2. ». 50, Hobs. Br. Mosses, r. 2. 

 n. 43. Muse. Brit. < I. 2. p. L26. t. 21<—Brvum striatum, I 



Lnm.— Dill. Muse. t. 55./ 9. 



i: ka and walls. FV. Apr.— Stem scarcely an inch in height. 

 Leaves, when dry, ofa tawny brown. Ca\ 



of the peristome arched when moist, inclined or i recurved) 



when dry.— Hedwig sppean to bav< i ' n <K 



cupula turn, 



items 



r\ . 



