Dicranace;??.] 162 [Dichodontium. 



I. DICHODONTIUM PELLUCIDUM (L.) Schimp. 



Dioicous ; laxly tufted ; leaves squarrose, flexuose, lineal-lanceolate, 

 entire or crenulate at point, obtuse, papillose. Caps, cernuous, ovate, 

 lid rostrate. (T. XXIV, D.) 



Syn. — Muscus polytrichoides angustifolias pellucidus ramosus. Pluk. in Ray Synops. st. br. 

 app. 241 (i6go) ; Phytogr. i, t. 49, fig. i (i6gi). 



Bryum erectis capituUs subrotundis fuscis, fol. minoribus pellucidis rugosis Dill, in Ray 

 Syn. 3 ed. g6 {1724) ; Var. 



Bryum palustre pellucidum, capsulis etfoliis brevibus recurvis Dill. Hist. Muse. 364, T. 46, 

 f. 23 (1741) ; (excl. syn. et var. ramosa.) et Herb. 



Bryum pellucidum L. Sp. plant, ii, 1118 (1753) p.p. et. excl. var. p, Syst. nat. ii, 701, Syst. 

 veg. 948. HuDS. Fl. angl. 407 (1762). Neck. Meth. muse, 204 (1771). Lightf. F1. 

 scot, ii, 724 (1777). Abbot Fl. Bedf. 237 (1798). Hull. Br. fl. P. 2, 264 (1799). 



Dicranum pellucidum Hedw. Fund. muse, ii, 92 (1782). Timm Pr. fl. megap. n. 786 (1788). 

 Roth op. c. 177, Brid. muse. rec. II, P. I, 176 (1798), Sp. Muse. I, 192 (1806), Mant. 62 

 (i8ig), Bry.univ. 1,439 (1826). Swartz Muse. suec. 35 (i79g). Roehl. Moosg. deutseh. 

 355 (1800), Deutseh. fl. ill, 6g (1813). Hedw. Sp. muse. 142 (1801). Smith Fl. brit. iii, 

 1223 (1804), Eng. bot. 1. 1346. Turn. Muse. hib. 68 (1804). P. Beauv. Prodr. 54 (1805). 

 Web. Mohr Bot. Taseh. 183 (1807). Schwaeg. Suppl. I, P. I, 181, t. 48 (1811). Voir 

 Muse, herbip. 4g (1812). Mart. Fl. er. erl. 103 (1817). Hook. Tayl. Muse. brit. 55, 

 t. 17 (1818). Gray Nat. arr. br. pi. i, 736 (1821). Hook. Fl. sect. P. 2. 133 (1821), 

 Br. fl. ii, 40 {1833). FuNCK Moost. 30, t. 21 (1821). Zenk. Dietr. Muse, thuring. II, 

 n. 2g (1822). HuEBEN. muse. germ. 26g (1833). Mack. Fl. hib. P. 2, 23 (1836). De 

 Not. Syll. muse. 208 (1838). Hartm. Skand. fl. Br. Schimp. Bry. eur. fasc. 37-40, 

 p. 16, t. 4 (1847). Rabenh. Deutseh. kr. fl. ii, S. 3, 138 (1848). Wils. Bry. brit. 67, 

 t. 17 (1855). Husn. Mouss. nord-ouest 48 (1873). Hobk. Syn. br. ra. 41 (1873). 



Milium pellucens Gmel. Syst. nat. ii, 1328 (1791). Laich. PI. eur. 476 (1794). With. 

 Bot. arr. br. veg. 3 ed. iii, 802 (1796). 



Dicranum aquaticum Ehrh. er. exsie. u. 213 (1790). Roth Fl. germ, iii, P. I, 177 (1800). 

 Brid. Muse. rec. II, P. I, 158 (1798). 



Bryum aquaticum Hoffm. Fl. germ, ii, n. 35 (1796). 



Angstroemia pellucida C. Muell. Synops. ii, 606 (1851). Jens. Bry. dan. gg (1856). 



Dichodontium pellucidum Schimp. Bry. eur. CoroU. 12 (1855). Synops. 65 (i860), 2 ed. 66 

 (1876). Berk. Handb. br. m. 284 (1863). Milde Bry. siles. 55 (1869). De Not. Epil. 

 bri. ital. 489 (1869). Lindb. in Bot. Notiser 1878 p. 115, Juratz. Laubm. oest.-ung. 

 28 (1882). 



Tridontium pellucidum Lindb. in Oefv. vet. ak. forh. xxi, 230 (1864). 



Didymodon Woodii Schimp. MSS. 



Dioicous ; in lax tufts i — 3 in. high, light green above, dull lurid 

 green below. Stem flexuose, erect, sparingly branched with a long 

 innovation at the perichastium, radiculose below. Leaves laxly imbri- 

 cated, erecto-flexuose, appressed and twisted when dry, from an oblong 

 sheathing pale pellucid base, squarroso-recurved, lineal-lanceolate, more 

 or less obtuse and cucullate, canaliculate, slightly undulate at margin, 

 entire or more or less serrated towards point, opake, papillose on both 

 sides ; nerve stout, vanishing at apex, crenulate at back near the point ; 

 cells at base elongated rectangular pellucid, above minute quadrate, deep 

 green, strongly papillose at back. Perich. bracts like the leaves but 

 more sheathing at base, seta stout, pale yellow, short rigid; caps, 

 cernuous, pachydermous, gibbose-ovate or subglobose, subsymmetric, 

 smooth, with scarce any neck, pale olive or reddish -brown, black when 



