DiCRANACE^.] 163 [Dichodontium. 



old, not annulate ; lid large convex conic, obliquely rostrate, orange ; 

 teeth large, 2 — 3-fid, blood-red, orange above, punctate-striolate below 

 middle, papillose at apex. 



Male pi. like the female, infl. terminal, gemmiform, bracts from a 

 broad base very concave, broadly linear-subulate, nerve excurrent. 



Hab. — Wet rocks and stones about the beds of streams and by waterfalls ; 



not uncommon. Fr. 10 — 11. 



This moss varies considerably in the form and size of the capsule and 

 length of the lid, but in all the specimens that have come before us we have 

 seen no transition to the next species. In habit it much resembles Anisothe- 

 cium squarrosum which may always be distinguished by its smooth leaves and 

 lax areolation. According to Lindberg the genus Tridontium belongs to 

 Tortulaceae, standing near Scopelophila Mitt. (Merceya Schimp.) 



Var. /3. fagimontanum {Bvid.) 



Plants shorter more dense with shorter branches ; leaves shorter, more 

 obtuse, scarcely recurved ; capsule smaller. 



Syn. — Dicranum pellucidum var. p. fagimontanum Brid. Sp. muse. I, 192 (i8o5), Bry. univ. 

 1,441. 

 Dichod. pellucidum var. ft. fagimontanum Schimp. et auct. cit. 



Hab. — Similar localities in more alpine districts. 



Ben Lawers {Braiihwaite 1865) ! ! Sandstone rocks at Clifton Junction {Holt 1883) ! ! 



Variable in density and height, sometimes only reaching half an inch, 

 but readily distinguished by its short obtuse leaves. 



2. DICHODONTIUM FLAVESCENS {Dichs.) Lindh. 

 Dioicous ; laxly tufted, scarcely branched ; leaves lineal-lanceolate, 

 more distant, serrate in upper half, less obtuse. Caps, erect or a little 

 inclined, cylindraceous, lid rostrate. (T. XXIV, E.) 



Syn. — Muscus polytrichoidcs elatior, foliis angustis pelhicidis et fere membranaceis. Pluk. in 

 Ray Synops. app. 240 (i5go) ; Phytog. i, t. 44, fig. 7 (1691), Almag. bot. 257 (i6g6). 



Bryum erectum, capit. sabrotundis fuscis ; fol. minoribus pellucidis rugosis. Dill, in Ray 

 Syn. 3 ed. g6 (1724), excl. var. 



Bryum fiavescens Dicks. Fasc. pi. or. II, 4, t. 4, fig. 5 (1790). Gmel. Syst. nat. 13 ed. 

 ii, P. 2, p. 1338 (1791). With. Bot. arr. Br. veg. 3 ed. iii, 830 (1796). Hull Br. Fl. 

 P. -2, 254 (1799). 



Bryum lineare Dicks. Fasc. Ill, 6, t. 8, fig. 2 (1793). 



Dicranum fiavescens Turn. Muse. hib. 70 (1804). Sm. Fl. brit. iii, 1224 (1804), Eng. Bot. 

 t. 2263. Brid. Sp. muse. I, 196 (1806), Mant. 63 (1819). Hook. Tayl. Muse. brit. 98, 

 t. 17 (excl. syn. W. M. Schwg. et Funck.) 1818. Gray Nat. arr. br. pi. i, 736 (1821). 

 Hook. Fl. scot. P. 2, 132 (1821), Br. Fl. ii, 40 (1833). Mack. Fl. hib. p. 2, 22 (1836). 



Dicr. gracilescens jB. fiavescens Brid. Bry. univ. i, 442 (1826). Hueben. Muse. germ. 255 

 {1833). 



Dicr. pellucidttm var. y. serraium Br. Schimp. Bry. eur. fasc. 37 — 40, p. 16, t. 4 y. (1847). 

 WiLS. Bry. brit. 68, t. 17 (1855). Hobk. Syn. br. m. 41 (1873). 



Angstrcemia pellucida var. y. serrata C. Muell. Synops. ii, 607 (1851). 



Dichodontium pellucidum var. y. serratum Schimp. Bry. eur. CoroU. 13 (1855), Synops. 65 

 (i860), 2 ed. 66 (1876). MiLDE Bry. sil. 55 (1869). Juratz. Laubm. Oesterr.-ung. 28 

 (1882). 



Dichodontium fiavescens hiNDB, in Botan. notiser 1878, p. 113, et Muse, scand. 27 (1879). 



