PoLYTRiCHACE^.] 5 1 [Polytrtchum. 



with on the higher mountains and in northern Europe, one of which Var. 

 silvaticum (Menz.) is probably a native of Scotland, and is chiefly distinguished 

 by its narrower oblong, subincurved capsules. Another, Var. septentrionale 

 (Sw.) LiNDB. is incorrectly referred by Hooker and Wilson to P. sexangulare, 

 misled apparently by specimens so called in Herb. Turn., Swartz described 

 his F. septentrionale with " leaves acute at apex, serrulate," and it must be 

 referred to P. alpinum, as is well shown by Lindberg. 



Sect. 3. EUPOLYTRICHUM C. Muell. 



Stems taller ; leaves lanceolate, acute. Capsule with 2 — 6 angles. 



5. POLYTRICHTJM SEXANGULARE Florke. 



Dioicous ; simple, erect. Leaves linear-lanceolate, obtuse, with 

 the margin inflexed and quite entire. Capsule ovate, 5 — 6 angled; lid 

 rostrate. (T. VII, A.) 



Syn. — Polytrichum sexangulare Floerke in Hopp. Bot. Taschenb. 1800, pp. 43 et 150, n. 4. 

 Sturm Deutschl. Fl. ii, 4 (1800). Web. Mohr Bot. Tasch. 220 (1807). Brid. Sp. 

 rausc. II, 52 (1812) ; Mant. muse. 196 (i8ig) ; Bry. univ. ii, 145 (1827). Rohl. Deutsch. 

 Fl. iii, 58 ; Ann. Wett. Ges. iii, 218 (1814). Funck Moostasch. 68, t. 54 (1821). 

 Wallr. Fl. crypt, germ, i, igg (1831). Br. Schimp. Bry. Eur. iv, mon. 7, t.u (1844) ; 

 Syn. Muse. 443 (i860) ; et 2 ed. 540 (1876). Wils. Bryol. brit. 209, t. 10, fig. g (1855). 

 Hartm. Skand. Fl. 8 ed. 373, p.p. (1861). Berk. Handb. Br. m. 207, t. 18, f. 6 (1863). 

 MiLDE Bry. Siles. 251 (1869). De Not. Epil. Briol. Ital. 333 (1869). Hobk. Syn. br. 

 m. 102 (1873). 



Pol. crassisetum Lam. De C. Fl. frane. 3 ed. ii, 486 (1805), et v, 224 {1815). 



Pol. septentrionale (non SwTz.) P. Beauv. Prodr. 85 (1805) ? Eng Bot. t. 1906 (1808). 



ScHWAEG. Suppl. I, P. II, 313, excl. syn. (1816) ; et in L. Sp. pi. 5 ed. v, P. II, p. 5 excl. 



syn. (1830). Wallm. in Liijebl. Svensk S.. 3 ed. 527, p.p. (1816). Hook. Tayl. 



Muse. br. 25, t. X, p.p. (1818). Hook. Fl. Seot. P. 2, 126 (1821) ; Brit. Fl. ii, 49 (1833). 



SoMM. Suppl. Fl. lapp. 55, p.p. (1826). HuEBEN. Muse. germ. 528, excl. syn. (1833). 



De Not. Syll. muse. Ital. 160 (1838). C. Muell. Syn. muse, i, 223, excl. syn. 



(1848) ; et Deutsch. moos. 171, excl. syn. (1853). Raeen. Deutschl. Krypt. Fl. ii, P. Ill, 



237. P-P- (1848). 

 Pol. helveticum Schleich. cent. Ill, u. 16 (1815). 



Dioicous ; widely casspitose, deep green above, rufo-ferruginous 

 below, without radicular tomentum. Stem naked at base, rigid, 

 flexuose, 3 — 5 in. high, simple, erect, or decumbent. Leaves short, 

 gradually elongating as they ascend, incurvo-patent or secund, when 

 dry laxly incumbent, from a broad base, suddenly elongato-lanceolate, 

 quite entire, glossy, rigid, semiterete, rather obtuse, smooth at back, 

 margin thin, papery, inflexed; lamellae high, about 32, each in section of 

 4 — 6 cells, the marginal one larger, incrassate, ovate, smooth. Perich. 

 bracts longer, with longer sheaths. Seta bright red, thick. Calyptra 

 reaching middle of capsule, brownish. Capsule erect or inclined, ovate 

 with 6 obtuse angles, reddish brown, when dry hexagono-prismatic, 

 pachydermous ; hypophysis obconic, not well defined ; lid from a 



