GRIMMIACE.E.] 62 [Zygodon. 



This pretty moss flourishes best in mild moist localities, and with us 

 attains its greatest perfection in Devonshire and at Killarney, where the fruit 

 is abundant. 



Var. /3 rupestris Lindb. 



Plants more robust, dark green ; leaves twisted when dry, longer, 

 narrower, apiculate, the nerve stronger, reaching nearly to point. Caps, pale 

 brown, subcylindric, tapering at base, not contracted at mouth. 



SYN. Zygodon rupestris LINDB. M. S. 1861 ; Muse, scand. 29 (1879). MILDE Bry. siles. 164 



(1869). 



Zygodon viridissimus ft. rupestris HARTM. Handb. Skand. fl. Mossor, 9 ed. 52 (1864). 

 Zyg. viridissimus R. saxlcola MOLENDO M. S. 1862. RABENH. Bryoth. eur. n. 626 (1863). 

 LORENTZ Moos-studien 95 (1864). 



HAB. Rocks and walls ; rare. 



Old wall near Oxford (Bosieell 1884) ! ! Wall at Barmouth with Z. Stirtoni (Holt 1882) ! ! 

 Limestone rocks at Castleton, Derby, and Rushen Abbey, I. of Man, with Z. Stirtoni 

 (Holt 1884) ! ! On sycamore, Derry (J. H. Davies 1885) ! ! Rocks at Pentreath, 

 Anglesey, c. fr. (Rogers 1887) ! Malham (Holt 1885) ! Miller's dale (Holt 1884) ! ! 



A stouter plant than the type and of a dull dark green colour, almost 

 intermediate between Z. Stirtoni and Z. viridissimus. 



3. ZYGODON CONOIDEUS (Dicks.) Hook. Tayl. 



Dioicous ; in small lax slightly -branched tufts. Leaves less dense, 

 patent, broadly lane., flat, keeled ; nerve vanishing. Caps, oval- 

 pyriform, lid subulate, teeth 16, pale yellow, short, obtuse ; endostome 

 of 8 fugacious cilia. (T. LIV, D.) 



SYN. Bryum conoldeum DICKS. Cr. Fasc. IV, t. n, f. 2 (1801). TURN, Muse. hib. 112 (1804). 

 Mnium conoideum SM. Fl. brit. 1345 ( lg 04); Eng. Bot. t. 1239. 

 Zygodon conoldeus HOOK. TAYL. Muse. br. 71, t. 21 excl. syn. (1818). GRAY Nat. arr. Br. 



pi. i, 744 (1821). HOOK. GREV. in BREWST. Ed. J. sc. i, 132 (1824), ut Var. minor. 



HOOK. Br. fl. ii, 52 (1833). MACK. Fl. hib. P. 2, 29 (1836). WILS. Bry. br. 193, t. 21 



(1855). SCHIMP. Synops. 250 (1860), 2 ed. 296. BERK. Handb. br. m. 217, t. 20 (1863). 



BOULAY Fl. cr. de 1'Est 350 (1872). HOBK. Syn. br. m. 98 (1873). HUSN. Mouss. nord- 



ouest 100 (1873), Muse. gall. 148, t. 42 (1887). 



Zygodon Brebissoni BR. SCH. Bry. eur. Fasc. 4, p. 8, t. 2 (1839). C. MUELL. Synops. i, 

 673 (1849). 



Dioicous; in small lax light yellow-green tufts. Stems nearly 

 simple or sparingly branched, slender, beset with ferruginous radicles 

 at base. Leaves less dense, patent, curving upward, imbricated when 

 dry, lineal-lane., acuminate, flat and slightly keeled, more papillose, 

 nerve narrow, vanishing below apex, more opaque ; cells larger and more 

 incrassate. Caps, on a longish slender pale seta, oval, tapering 

 downwards into a neck of equal length, narrower, striate toward mouth, 

 when dry and empty, leptodermous, pale fuscous ; lid with a subulate 

 beak ; peristome of 8 bigeminate, pale yellowish teeth, reflexed when 



