Bartramiace^.] 202 [Conostonium. 



A genus closely allied to Bartramia and depending chiefly on the elegant 

 dome-like arrangement of the teeth of peristome. Four more species are 

 recorded, natives of S. America and Australia. 



CONOSTOMUM BOREAIE Swartz. 



Dioicous; compactly tufted, slender, fragile. Leaves in 5 rows, 

 narrow lane, cuspidate, serrate at apex. Caps, obovate, striate, 

 deeply furrowed. (T. LXXVI, A.) 



SYN.—Bryum tetragonum Dicks. PI. crypt. Fasc. II, 8, t. 4, f. 9 (1790). Wither. Bot. arr. 

 3 ed. iii, 835 (171)6). Brid. Muse. rec. II, P. Ill, 59 (1803). 



Grimmia conostoma Sm. F1. brit. 1169 (1804) ; Eng. Bot. t. 1135. 



Conostomum boreale Swartz in Schrad. neu Journ. Bot. i, P. Ill, 26, t. 5 (1806). Schwaeg. 

 Suppl. I, P. I, 79, t. 20 (1811). Wahlen. F1. lapp. 317, t. 21 (1812), Fl. carpat. 233' 

 (1814). Hook. Tayl. Muse. br. 20, t. 10 (1818). Brid. Bry. univ. i, 150 {1826). 

 Hook. Fl. scot. P. 2, 125 (1821), Br. Fl. ii, 17. Hueben. Muse. germ. 157 (1833) 

 Gray. Nat. arr. Br. pi. i, 719 (1821). De Not. Syllab. 223 (1838), Epilogo 267 (1869). 

 Nees Hornsch. Bry. germ, ii, P. i, p. 22, 1. 13 {1827). C. Muell. Synops. 1,469 (1849). 

 WiLS. Bry. brit. 284, t. 10 (1855). Schimp. Synops. 421 {i860), 2 ed. 514. Berk. 

 Handb. br. m. i6g (1863). Hobk. Syn. br. m. 132 (1873). Juratz. Laubra. oester.-ung. 

 330 (1882). Lesq. James Moss. N. Amer. 207 (1884). HusN. Muse. gall. 264, t. 73 

 {1890). LiMPR. in Rabenh. D. kr. fl. Laubm. ii, 551 (1893). 



Conostomum arcticum Swartz in Brid. Sp. muse. I, 127 (1806). 



Bartramia conostoma Br. Sch. Bry. eur. fasc. 12, p. 16, t. 7 (1842). Raben. D. kr. fl. ii. 

 S. 3, 191 (1848). 



Conostomum tetragonum Lindb. Oefv. K. Vet.-Ak. Foerh. 1863, p. 8. 



Dioicous ; compactly tufted, glaucous green above, brown at base ; 

 plants slender, fragile, fastigiate. Leaves densely crowded in 5 rows, 

 erect, rigid, the lower lane, gradually becoming longer upwards, 

 narrowly lane, serrate at apex, acute, carinate ; nerve reaching apex, in 

 the upper leaves excurrent in a long point and slightly serrate at back, . 

 leaf-cells rectangular; perich. bracts larger, thinner with a thin nerve. 

 Seta pale red, caps, turgidly obovate, pale brown, deeply sulcate; 

 peristome inserted far below the mouth, teeth 16, purple, linear-lane, 

 distant from each other at base, connate at apex. Male infl. round, 

 bracts from a broad base, concave, lanceolate, innermost shorter, laxly 

 areolate. 



Hab.— Damp peaty places on the higher Scotch mountains. Ben Lomond, 

 Ben Lawers, Craig Chailleach, &c. Fr. 7 — 8. 



Characterized by the peristome, the teeth of which arch gracefully inward 

 and are united together by their points. As the original name tetragonum 

 expresses an error, I have maintained the later one of Swartz, 



