HYPNACE^.] 85 [Hypnum. 



Dioicous ; in flat expanded lax yellowish-green tufts, sometimes 

 with an opalescent gloss, and often closely adhering to the substratum. 

 Stem slender creeping, stoloniform, without paraphyllia, branches 

 irregular short distant, Stem-leaves far apart, patent, ovate or 

 cordate, gradually tapering to a narrow rather obtuse point, finely 

 serrulate all round ; nerve thin, about length of leaf, cells rectangular 

 and quadrate at base, narrow above and 6 8 times long as wide. 

 Branch-leaves ovate with a short point, patent, sharply serrate, nerved 

 to f length, cells 6 12 times long as wide. Perichsetial bracts 

 numerous, squarrosely recurved in a serrated ligulate subula, nerveless 

 or with a short faint nerve ; seta red, rough with obtuse warts; capsule 

 cernuous, longish-ovate, brown, lid paler, conic, rostrate, long as 

 capsule ; annulus of two rows of cells, peristome reddish. 



HAB. On the ground among grass in limestone districts and in wet clay 

 fields or on rotten tree-trunks, not common. Fr. n 2. 



Hurstpierpoint, Wolstonbury hill c. fr. (Mitten 1856) ! Lindfield, Sussex c. fr. (Davies 

 1856) ! ! Knowle Park (Borrcr) ! Near Cambridge (B. Syme 1863). St. Vincent's rocks, 

 Bristol (Wilson 1863) ! ! Cotterall wood (Hunt 1863) ! ! Kiel Den, Fife (Howie 1865) ! 

 Ballinascorey Glen, Ireland (D. Orr 1867) ! Near Penzance (Curnow) 



This most variable moss comes very near to H. Swartzii but differs in 

 habit and form of leaf, and I think there is no doubt that Grout is right when 

 he unites H. distans with it. The typical form has broadly lanceolate leaves, 

 tapering gradually to a somewhat obtuse point, but also occurring with a 

 more or less acute acuminate apiculus ; this grows on dry limestone banks, 

 and is of a delicate yellowish green colour. When growing in shaded 

 marshy places it becomes prostrate, slender and attenuated and with a 

 fuscous tinge, the opalescent gloss described probably vanishes in drying, as 

 in Pohlia cruda. The perichaetial bracts also vary in being nerveless, or faintly 

 nerved half-way, but this does not afford an important character. H. Swavtzii 

 is more robust and densely branched, yet it is not improbable that it will also 

 have to be united to H. hians. 



16. HYPNUM CRASSINERVE Tayl. 



Dioicous ; stem creeping, with erect crowded simple branches. 

 Leaves crowded, spreading, ovate, acuminate, concave, serrated, margin 

 reflexed, nerved above halfway. Seta rough ; capsule oval, cernuous ; 

 lid with a long slender beak. (T. CI, A.) 



SvH.Hypnum crassinurvium TAYL. MSS. et in MACK. Fl. hibern. Part 2, p. 43 (1836). WILS. 

 Eng. Bot. Suppl. t. 2706, et Bry. Brit. 346 (1855). HOOK. Br. Fl. li, 88 (1833). RABENH. 

 D. kr. fl. II, S. 3, 2gq (1848). C. MUELL. Synops. ii, 371 (1851). BERK. Handb. 85 

 (1863). HOBK. Synops. 154 (1873). BOUL. Muse. Fr. 107 (1884). 



Hypnum pachyneiiron HAMPE in sched. 



