Bri/um.] 



MUSCI-ACROCARPI-PERISTOMI. 57 



B. Internal peristome formed of a membrane more or less divided 

 into lacinicE. 



27. Br YUM. Linn. Thread-Moss. 



Seta terminal. Peristome double : the outer of 16 teeth; the 

 inner of a membrane cut into 16 equal segments, with filiform 

 processes frequently placed between them. Calyptra dimidiate. 

 (Muse. Brit. t. 3.) — An ancient name of Dioscorides, given by 

 Dillenius to this Genus and its affinities. 



1. Capsules sulcated. (Milium, Brid. not Sm.) 



1. B. androcj;/num, Hedw. (narrow-leaved Thread-Moss); 

 stems nearly simple, leaves lanceolate serrated their margins 

 recurved, capsule nearly erect cylindrical sulcated, lid conical. 

 Hedw. Sp. Muse. p. 178. Turn. Muse. Bib. p. 113. Muse, Brit, 

 ed. 2. p. 193. t. 28. — Mnium androgynum, Linn — E. Bot. 

 t. 1328. Fl. Brit. p. 1344. — Gymnocephalus androgynus, 

 Schwaegr. Suppl. v. 2. p. 87. Dill. Muse. t. 31. / 1. 



In woods and on banks. Fr. ? very rare.— Surface of the leaf 



papillose. The colour pale green. The male flowers, as Hedwig calls 

 them, form a granular head, terminating an elongated and almost leafless 

 portion of the stem : but these assuredly are gemmae and quite different 

 from the anthers (so called) in other mosses, which Mr. Wilson finds 

 mixed with the pistils. Hence the name is peculiarly applicable, 

 though Linnaeus could not have understood it in this sense. 



2. B. palustre, S\v. (Marsh Thread-Moss); stems much 

 branched, leaves lanceolate obtuse entire their margins invo- 

 lute, capsule ovate oblique sulcated, lid conical. Swart:. Muse. 

 Surr.—E. Bot. t. 391. Turn. Muse. Hib. p. 113. Hobs. Br. 

 Mosses, v. 1. n. 97. Drum. Muse. Seat. v. \. n. 97 — Mnium 

 palustre, Linn.— Hedw. Sp. Muse. p. iss. Schwaegr. Suppl. 

 r. \. 1\ IT. p. 122. Fl Brit p. 1346. 



I , frequent. Fr. June.— Habit of the last, with leaves of the 

 Bame texture; but the plant is much larger. Male /lowers (of Hedw.) 

 discoid. These are besides powdery or granulated heads on elongated 

 naked Btems -.!• branches, similar to those of the preceding species: but 

 here, they are looked upon as gemnus. The inner peristome o£ both 

 ha- a pair ofi /" between each ofthe segments, ami these segments are 

 deft from the base almost to the extremity. 



2, ( 'apsuh s smooth < >">' suhatt d ). 



a. Teeth of the out, i pi ristome short r iktm the iitih r. 



( Meesia, //< da-. ) 



3. B. triehddes, Linn, (capillary Thread-Moss); Btems some- 

 what branched, leaves linear obtuse entire reticulated, capsule 



narrow -pvriform curved Bubcernuous, seta very long. l.nui. 

 11. lied.' p. 1350. /:. n»f.t. 1517, Hobs. Br. M u h >■ -■ 

 ,,. 7i. Drum. Muse. Scot. >■. I. //. 98. Muse. Brit <d. -J 



