PTERYGOPHYLLACEA] 195 \_Daltonia. 



2. CYCLODICTYON Mitt. 



Journ Linn. Soc. vii, 163 (1864). 



Stems procumbent, vaguely branched or subpinnate. Leaves unequal, 

 narrowly limbate, two-nerved ; the cells wide, hexagono-rotundate or 

 elliptic. Capsules inclined or horizontal; calyptra smooth or scabrous; 

 teeth of peristome deeply sulcate in the middle line, densely articulate. 

 Living on wet rocks and by water. Der. KVK\O<; a circle, and SIKTVOV a net. 



CYCLODICTYON LJETE-VIRENS (Hook. Tayl.) Mitt. 



Autoicous ; procumbent, subpinnate ; leaves complanate, laxly imbri- 

 cate, ovate with a short acumen, serrulate at apex ; nerves length of 

 leaf. (T. CXIX, B.) 



SYN. Hookeria Icete-virens HOOK. TAYL. Muse. Brit. 89, t. 27 (1818). HOOK. & GREV. in Edin. 

 Journ. Sci. ii, 230 (1825). GRAY Nat. arr. Br. pi. i, 752 (1821). SCHWAEG. Suppl II 

 P. II, t. 163 (1826). C. MUELL. Synops. ii, 187(1851). WILS. Bry. Brit. 417, 1.27(1855). 

 BERK. Handb. 68, t. 3 (1863). BR. SCH. Bry. Eur. fasc. 4647, t. I (1851). SCHIMP. 

 Synop. 480(1860), 2 ed. 581. HOBK. Synop. 184 (1873). HUSN. Muse. Gall. 296 t 84 

 (1892). Dix. JAMES. Stud. Handb. 364 (1896). 



Pterygophyllum Icete-virens BRID. Bry. univ. ii,. 350 (1827). 

 Hookeria albicans (non HEDW.) TAYL. in Fl. Hib. P. 2, p. 36 (1836). 



Cyclodictyon Icete-virens MITT, in Journ. Linn. Soc. vii, 163 (1864). LIHPR. in RABENH. D. kr. 

 fl. Laubm. ii, 722 (1895). 



Autoicous ; stems I 3 in. long, procumbent, subpinnate. Leaves 

 deep green, not glossy ; laxly imbricated, complanate. slightly undulated 

 when dry, ovate or elliptic with a short acumen, serrulate at apex, and 

 a narrow thickened border of 3 4 rows of cells ; nerves two, divergent, 

 f length of leaf ; cells incrassate, hexagonal, rounded at corners, with ovate 

 or elliptic ones intermixed. Perich. bracts erect, lanceolate-acuminate ; 

 seta reddish, smooth ; capsule yellowish-brown, cernuous, elliptic ; lid 

 conic, rostrate, acute ; teeth of peristome deeply sulcate in the middle, 

 with a prominent reddish ridge on each side ; processes lanceolate-subulate ; 

 cilia none. 

 HAB. By waterfalls and shady hollows, and on wet rocks; rare. Fr. 1012. 



By a spring in Dunscombe's wood, Cork (Drutntnond 1815). Tore waterfall and O'Sullivan's 

 cascade, Killarney (Taylor and Harvey, 1831) ! ! Mousehole cave, Penzance (Kal/s) ! ! 



About 60 species of this fine genus have been described, but the present is 

 the only one found in Europe. 



3. DALTONIA Hook. Tayl. 



Muse. Brit. 80 (1818). 



Stems erect, tufted ; leaves crowded, spreading on all sides or 

 complanate, ovato-lanceolate, the cells long and rhomboid. Calyptra 



