PoLYTRicHACE^.J 43 \pUgotrichim. 



OLIGOTRICHUM INCURVUM (Huds.) Li 

 Dioicous; stems short, simple. Leaves patent, incm-ved, lanceo- 

 late, concave, involute above, subserrate, lamellas numerous, undulated. 

 Capsule erect, ovato-cylindric ; lid conic, acuminate. (T. V, D.) 



Syn. — Brymn inciirvum Huds. F1. Angl. 2 ed. 479 (1778). 



Catharinca hcrcynica Ehrh. Beitr. i, igo (1787). Web. Mohr Bot. Tasch. 217 (1807). 

 Fl. dan. t. 1417 (1810). Rohl. Deutsch. Fl. iii, 61 (1813) ; Ann. Wett. Ges. iii, 232 

 (1814). Brid. Mant. muse. 203 (i8ig); Bry. univ. ii, gg (1827). Rabenh. Deutsch. 

 Krypt. Fl. ii, P. 3, 234 (1848). C. Muell. Syn. muse, i, 196 (1849). 



Polytrichtim hercynicum Hedw. St. crypt, i, 40, t. 15 (1787) ; Sp. muse. g4 (1801). ScHRANK 

 Baier. Fl. ii, 447 (1789) ; Prim. Fl. sal. 824 (1792). Dicks. PI. crypt, Fase. 2, 3 (1790). 

 With. Bot. arr. Br. Veg. 3 ed. iii, 797 (1796). Brid. muse. rec. ii, P. I, gi, t. 2, f. 12 

 (i7g8) ; Sp. muse. I, 77 (1806). Hull Brit. Fl. P. 2, 248 (1799). Roth Fl. germ, iii, 

 353 (1800). Rohl. Moosg. Deuts. 197 (1800). Smith Eng. Bot. t, 1219 {1803); Fl. Br. 

 iii, 1381 (1804). Wahlenb. Fl. Lap. 348 (1812) ; Fl. Carp. 349 {1814). Schwaegr. 

 Suppl. I, P. II, 329 (1816). Hook. Tay. Muse. Br. 24, t. X (1818). Funck Moostasch. 

 70, t. 57 (1821). Gray Nat. arr. Br. PI. i, 720 {1821). Hook. Fl. Scot. P. 2, 125 (1821) ; 

 Brit. Fl. ii, 45 (1833). Wallr. Fl. crypt, germ, i, 195 (1831). Hueben. Muse. germ. 

 521 {1833). 



Oythotrichum hercynicum Hoffm. Deutsch. Fl. ii, 25 (1795). 



Atrichum hercynicum P. Beauv. Prodr. 42 (1805). 



Oligotrichnm hercynicum Lam. et De C. Fl. franc. 3 ed. ii, 492 (1805). Br. Schimp. Bry. 

 eur. iv, mon. 4, t. 5 (1844) ; Syn. 'muse. eur. 436 ^i86o), et 2 ed. 531 (1876). WiLS. 

 Bry. Brit. 205, t. x (1855). Berk. Handb. Br. m. 212, t. 19, f. 3 (1863). Milde Bry. 

 Sil. 247 (1869). De Not. Epil. Briol. Ital. 342 (i86g). Hobk. Syn. br. m. loi {1873). 



OUg. incurvum LiNDB. in Hartm. Skand. Fl. g ed. ii, 45 (1864), et in Not. ur Sallsk. Fn. 

 et Fl. fenn. forh ix, 144 (1867). 



Dioicous ; gregariously ceespitose, in loose tufts, adhering by the 

 earth at roots, pale glaucous green, when old rufescent. Stems about 

 I in. high, erect, simple, rigid. Lower leaves remote, minute, appressed, 

 oval, acuminate ; upper crowded, rigid, twisted when dry, patent when 

 moist, subarcuate-incurved, very concave, from a pale thin, sheathing 

 base, narrowly lanceolate, the margin inflexed above the middle, remotely 

 serrate in upper part ; nerve at back toward apex, with three narrow 

 remotely serrate lamellae, above with lo — 12 high, sinuose, strongly 

 undulated lamellae, each in section of 5 — 12 equal rounded cells. 

 Capsule on a thickish orange-red pedicel, twisted to the right above 

 when dry, ovato-cylindric, erect, ferruginous, when dry plicate, contracted 

 below the mouth, and with a few stomata on the neck ; lid large, convex- 

 conic, obtusely acuminate, fugacious ; teeth of peristome pale, short, 

 unequal ; spores very small, smooth. 



Male plants short, more slender, the infl. rosaceous, bracts broadly 

 oval, acute, with a lamellar nerve ; paraphyses both filiform and 

 spathulate. 



Hab. — Bare declivities and sandy ground on mountains. Scotland, Wales, 

 N. of England, Ireland. Fr. 7. 



Var. y8. Laxum Braithw. 



Stems 3 — 4 in, high, slender, flexuose. Leaves more distant and 



