Hypnace^,] ^y [AmUystegium. 



Hypnum glmcum Lamarck FI. Franc, i, 522 (1778). Lam. et Cand. Syn. Fl. gall. 

 iod (1805). 



Hypnum filicinum ViLL. PI. Dauph. iii, 897 (1786). Schwaeg. Suppl. I, P. H, 297, ut var. 



Hypnum commutaium Hedw, Muse, frond, iv, 68, t. 26 (1797), Sp. muse. 284 (1801) 

 Swartz Muse. suae. 56 (1799). Brid. Muse. ree. II, P. II, 57 (1801), Sp. muse. II, 

 211 (1812) Mant. 177 (1819), Bry. univ. ii, 523 (1827). Roth Fl. germ. 284 (1800). 

 Smith Fl. brit. 1333 (1804), Eng. Bot. t. 1569. Turn. Muse. hib. ig6 (1804 . P. Beauv. 

 Prodr. 62 (1805). Web. Mohr Bot. Taseh. 356 (1807). Voit Muse. herb. 109 (1812), 

 et m Sturm Deutsch. Fl. II, f. 14. Wahlen. Fl. lapp. 379 (1812), Fl. carp. 361 (1814). 

 Roehl. Deutseh. Fl. iii, 113 (1813). Hook. Tayl. Muse. br. 112 (1818). Funck Moost. 

 66, t. 52 (i82ij. Gray Nat. arr. i, 765 (1821). Hueben. Muse. germ. 687 (1833). I^e 

 Not. Syll. S3 (1838). Rabenh. D. kr. fl. II, S. 3, 277 (1848). Br. Sch. Bry. eur. fase. 

 57—61, Mon. p. 39, t. 25 (1854). WiLS. Bry. brit. 393 (1855). Schimp. Synops. 613 

 jr86oK 2 ed. 741. Berk. Handb. br. m. 121, t. 10, f. 5 (1863). Milde Bry. siles. 354 

 (i86g). HoBK. Synops. 170 (1873). Boulay Muse. Fr. 45 (1884). Lesq. James Moss. 

 N. Amer. 387 (1884). HusN. Muse. gall. 395, t. 114 (1894). D:x. James. Stud. Handb. 

 466 (i8g6). 



Hypnum diastrophyllum Swartz Muse. suee. 58. Wahlen. Fl. lapp. 379, Fl. carp. 361. 



Amblystegium commutaium De Not. Epilogo 149 (1869). 



Amblystegium glaucum Lindb. Muse, scand. 32 (1879). 



Dioicous ; in tall dense rigid tufts, deep or yellow-green, ochraceous 

 below and often coated with calcareous deposit. Stem dichotomous, 

 pinnate, erect or procumbent, rufo-tomentose, with numerous lanceolate 

 and subulate paraphyllia. Cauline leaves rather remote, cordato- 

 triangular and auricled at base, narrowly falcate and acuminate, many- 

 sulcate, basal wing plane, eroso-denticulate at margin, auricle decurrent, 

 entire, orange, excavate to nerve, which is stout, yellowish and vanishing 

 in apex ; ramuline narrower, crowded, cirrate at point when dry. Cells 

 very narrow, long, subflexuose-linear, those above the auricle small pale, 

 hexagono-quadrate, of the auricle orange and incrassate. Perich. bracts 

 long pale lanceolate, inner acutely acuminate, deeply sulcate, strong- 

 nerved. Capsule on a long purple seta, cernuous, oblongo-cylindraceous, 

 ochreous-brown, strongly arcuate when dry, lid convex-conic, acute, 

 annulus broad ; teeth large, lineal-lanceolate, orange with a hyaline 

 limb, endostome with rimose processes and three long cilia. Male 

 plant smaller and more irregularly branched. 



Hab. — Dripping calcareous rocks by streams and in wet woods ; common. 



Fr. 5-6. 



Closely resembling y4. //?■«■»«»«, but differing in the more entire leaves 

 and abundant paraphyllia; it generally forms the nucleus of so-called 

 " petrified moss." 



Var. /?. sulcatum (ScUmper). 



Stem very slender, yellowish-green, procumbent or suberect, without 

 radicles but with many paraphyllia. Leaves secund, subinvolute, shorter, 

 from a broadly oy^te base, suddenly narrowly lanceolate, acuminate, sulcate ; 



