Grimmiace^.J 6x [Zygodon. 



Muckross on beech (Lindberg 1873). Derry, Ireland, on a sycamore c. fr. (y. H. Davies 

 1885) ! ! Kilroot and Rathlin island, Antrim (Stewayt 1880) ! ! Gordale Scar and 

 Malham (Holt 1885) ! ! Chee Tor and Monksdale {Holt 1886) ! ! Rushen Abbey, 

 I. of Man (Holt 1884) ! ! Annalong, Co. Down (Rev. H. Lett). Penmaen Rhos, 

 Colwyn (Holt 1889) ! ! 



This is certainly distinct from the next species, being of much firmer 

 texture, with sub-erect leaves and nerve excurrent to a variable extent, the 

 lamina often ending unsymmetrically on each side of it ; the capsule also is 

 rounder with a small mouth. It occasionally grows intermixed with 

 Z. viridissimus and its variety, and thus becomes an occupant of tree trunks. 



2. ZYGODON VIRIDISSIMUS {Dicks.) Brown. 



Dioicous ; in small lax bright green tufts. Leaves patent, recurvo- 

 squarrose, lineal-lane, acuminate, nerve narrow, vanishing below apex. 

 Caps, on a longish seta, leptodermous, oval-oblong with a short neck, 

 striate at mouth, lid rostrate. (T. LIV, C.) 



SYt^.—Bryum vindissimnm Dicks. Fasc. pi. cr. IV, g, t. 10, f. 18 (1801). Brid. Muse. rec. II, 

 P. Ill, 64, excl. syn. (1803). 



Dicranum viridisshnum Sin. Fl. br. 1224 (1804). Turn. Muse. hib. 71 (1804). Brid. 

 Sp. muse. I, 193 (1806). 



Gymnostomum viridissimum Sm. Eng. Bot. t. 1583 (1805). Hook. Tayl. Muse. br. 10, 

 t. 6, excl. syn. (i8i8). Gray Nat. arr. br. p). i, 714 (1821). Hook. Fl. scot. P. 2, 122 

 (1821) ; Br. fl. ii, 7 (1833). Schwaeg. Suppl. II, P. II, t. 177 (1826). Mack. Fl. hib. 

 P. 2, 9 (1836). 



Zygodon viridissimus Brown in Trans. Linn. Soc. xii, 575 (i8ig). Brid. Bry. univ. i, 

 592(1826). HuiiBEN. Muse. germ. 388 (1833). De Not. Syllab. 159 (1838). Br. ScH. 

 Bry. eur. fasc. 4, p. 7, t. i, excl. syn. (1839!. Rabenh. Deutsch. kr. fl. ii, S. 3, 175 

 (1848). C. MuELL. Synops. i, 671 (1849). WiLS. Bry. brit. 193, t. 6 (1855). Schimp. 

 Synops. 249 (i860), 2 ed. 295. Berk. Handb. Br. m. 218, t. 20 (1863). Milde Bry. 

 siles. 164 (i86g). Boulay Fl. crypt, de I'Est 349 (1872). Hobk. Syn. br. m. g7 (1873). 

 HusN. Mouss. nord-ouest 100 (1873), Muse. gall. 148, t. 42 (1887). Juratz. Laubm. 

 oester.-ung. igo (1882). 



Amphoridium viridissimum De Not. Epil. 277 (i86g). 



Uioicous ; in small cushioned tufts, biught green above, fuscous at 

 base. Stems h — i in. high, sparingly branched, fastigiate, with rufous 

 radicles at base. Leaves dense, when moist recurvo-squarrose, when 

 dry erecto-appressed or somewhat twisted, toward apex complicate, 

 oblongo — or lineal-lane, elongated, acutely acuminate, deeply carinate 

 above, expanded below, minutely papillose, margins plane ; nerve 

 pellucid, ending abruptly below apex, cells at base thin, quadrato- 

 hexagonal, above small hexagono-rotundate. Caps, on a longish pale 

 seta, erect, oval-oblong with a short neck, olivaceous, when dry pyriform, 

 fuscescent with a narrow red mouth, obscurely 8-costate ; calyptra 

 fugacious,- rostrate, lid orange, obliquely rostrate ; peristome none. 

 Male plant more slender, in distinct tufts, infl. terminal gemmiform, 

 bracts ovato-Ianceolate. 

 Hab. — Trees, sometimes on walls, not rare. Fr. 3 — 4. 



