130 DIPLOPERISTOMI. [ Orthotrichum . 



curved. Their colour is a deep yellowish green. On various 

 parts of their surface the Conferva Orthotrichi grows in abun- 

 dance, so that they appear strewed with a brown powdery sub- 

 stance. The fruitstalks are short, wholly immersed in the 

 leaves, as are the capsules for a great portion of their length. 

 These are of an oblong figure, with a remarkably long apo- 

 physis, which is smooth and shrinks much in drying ; while the 

 capsule itself is at all times, when ripe, distinctly furrowed; 

 whereas in O. striatum it is ovate, and always smooth. Lid 

 shortly rostrate. Peristome., the exterior of 1 6 long teeth, 

 standing erect when moist, recurved when dry; they are 

 marked with a central line, and are often cleft at the extremity. 

 Their colour is a pale yellowish brown ; that of the inner fringe 

 or cilise is a fine red, they are 16 in number, slightly tapering, 

 and decidedly jointed, but not so moniliform as in the pre- 

 ceding, nor have we ever seen lateral appendages to the joints. 

 Calyptra very hairy, narrower than in O. striatum, and all over 

 of the same brown colour. 



We are by no means sure that Hedwig, in the figure of the 

 capsule of his O. striatum in the Stirpes, has not given that of 

 this species, with which it certainly agrees in the situation, 

 apophysis, and, in a great measure, in the shape of the ciliary 

 processes. These, however, are represented too moniliform for 

 our plant, yet not enough so for those of O. striatum ; and the 

 colour is that of the last mentioned. 



f Capsule exserted. 



-t- Cilice eight. 



10. O. speciosum ; stems erect, leaves ovato-lanceolate acuminate 

 patent scarcely recurved at the margins and point, capsule 

 slightly furrowed, teeth of the peristome eight afterwards 1 6 

 reflexed, calyptra hairy. (SUPPL. TAB. IV.) 



Orthotrichum speciosum. Nees et Esenb. in Sturm, Deutscbl. Fl. ? 

 Moug. et Nestl. n. 72. Punch, Deutschl Moose, t. 34. /. 23. Drum- 

 mond, Muse. Scot. v. 2. n. 55. Hook, and Grev. in Edin. Journ. of 

 Science, v. 1. p. 124. Grev. Scot. Crgpt. Fl t. 137. Arn. Disp. 

 Muse. p. 18. 



Orthotriclium striatum. Hedw. St. Cr. v. 2. t. 36. f. 13. 



HAB. Near Montrose, Scotland; first discovered by Mr. Reid. 



On trees and stones near Forfar Mr. Drurnmond. 

 16 



