Grimmiace.eJ 64 [Zygodon. 



attenuate; teeth 8, bigeminate, minutely rugose, 3-ellow, broadly lane, 

 cleft at apex, when dry reflexed and appressed to the capsule, cilia 

 lanceolate-subulate, rather shorter than teeth, hyaline, slight]}' incurved. 

 Male inil. terminal on lateral ramuli, bracts ovate, acute. 



Hab. — Trunks of trees, rare. Fr. 5. 



On a felled tree in a timber yard at Chapel End, Walthamstow, probably brought from 

 Epping Forest (T. F. Forster) ! Near Hastings (jfenner) ! Minehead, Somerset [Miss 

 Gifford). Epping Forest (Holmes 1885) ! ! 



Wilson first cleared up the uncertainty about this moss, which had 

 been confounded with both Z. viridissimus and Z. conoides. It is of singular 

 soft pulpy consistence, and quite reminds us of a species of Pottia. 



5. ZYGODON GRACILIS. Wils. 



Dioicous ; taller, widely csespitose, fuscescent. Leaves subrecurved, 

 oblong-lanc, irregularly serrulate at apex, nerve excurrent. Caps, on 

 a short rufous seta, oblongo-cylindinc, lid rostrate, peristome as in Zyg. 

 conoidetis. (T. LIV, F.) 



Syn. — Zygodon gracilis Wils. MSS. Berk. Handb. Br. m. 219 (1863). Hunt in Mem. Lit. 

 Pliil. Soc. Manch. 3 ser. iii, 237 (1867). Hobk. Syn. br. m. 98 (1873). HuSN". Muse 

 gall. 149, t. 43 (1887). JuRATz. Laubm. oester.-ung. 190 (1882). 



Didymodon gracilis ScHnip. in Molendo Muse, tirol. aust. n. 16. 



Amphoridium gracile De Not. Epil. bri. it. 278 (1869). 



Zygodon Nowcllii Schimp. Synops. 2 ed. 297 (1876). Hoek. Syn. br. m. 2 ed. 130 {1884). 



Dioicous ; in wide crowded tufts, brownish or blackish-green above, 

 reddish-brown at base. Stems i — 3 in. high, rigid, repeatedly divided, 

 with innovations at short intervals, and fuscous branched radicles at the 

 lower leaf-axils. Leaves crowded, when moist subrecurvo-patent, 

 when dry laxly incumbent, lower narrowly elliptic-lane, upper from a 

 concave oblong base, narrowly lane, arched backward, acutely carinate, 

 the wings patent from the middle, waved, minutely papillose, at apex 

 irregularly eroso-serrate or only with 3 — 6 irregular distant repand teeth, 

 nerve semiterete, narrow, subcanaliculate in front, hispidnlous at 

 back, vanishing just below apex or slightly excurrent ; upper cells very 

 small, rounded and well-defined, more or less chlorophyllose, basal 

 oblongo and hexagono-rectangular, smaller towards margin, pachy- 

 dermous, diaphanous. Perich. bracts similar ; vaginula oblong, para- 

 physate, seta stout rufous, only 3 times length of capsule which is 

 oblongo-cylindric, suberect, somewhat asymmetric, castaneous, 8-striate, 

 costulate when dry, lid conico-rostellate pale red, calyptra long, rostrate, 

 annulus large, of 3 rows of cells; teeth pale, rather broad, 8 bigeminate, 



