NECKERACE*.] I99 [Homalia, 



HAB. On stones and banks in damp shady woods. Fr. n i. 



This fine moss is common, but the fruit is rare, and is produced on the upper 

 part of the stem, sometimes in abundance. 



Var. (3. acutum Lindb. in litt. 



Plants more slender ; the stem and branch leaves both more acute, and with 

 smaller cells ; the branches very slender, acute, and julaceous. 



HAB. At O'Sullivan's cascade, Killarney, on wet rocks. ? ster., very scanty, and 

 intermixed with the common species (July 22nd, 1873). 



Lindberg regarded this as a species, but I prefer at present to treat it as 

 a variety, as the characters appear to me quite comparative. 



2. POROTRICHUM ANGTJSTIFOLIUM (Holt) Dixon. 



Dioicous ; with the habit of last species, but more slender. Lower 

 stem-leaves triangular, with a broad flattened nerve nearly reaching point, 

 upper ovate serrate ; branch-leaves linear. (T. CXX, B.) 



S. Thamnium angustifolium HOLT Journ. Bot. 1886, p. 65, t. 265. LIMPR. in RABENH. D. kr. 



fl. Laubm. iii, 243 (1897). 



Porotrichum angMstifolium Dix. JAMES. Stud. Handb. 371 (1896). 



Dioicous ; with the habit of P. alopecurum^ but more slender and 

 less complanate, bright yellowish-green. ' Stem creeping, with erect 

 dendroid secondary stems, naked in the lower half, the branches slender, 

 horizontal, the longer with a few short ramuli, the shorter simple. Lowest 

 stem-leaves distant, squamose, triangular, entire, with a few small teeth 

 at the acute apex, nerve vanishing below apex, very broad and flat, \ width 

 of leaf ; upper erecto-patent, incurved when dry, ovate-acuminate, serrate, 

 with these are some intermediate in form with the branch-leaves, which 

 are linear, acutely pointed and sharply serrate in the upper half, the 

 nerve nearly \ width of leaf; cells oval above and larger than in last 

 species, at base elongated and linear, those of nerves narrow, elongated, 

 opaque with chlorophyl. Male infl. on the longer branches ; bracts ovato- 

 lanceolate, serrulate in upper half, nerveless, laxly areolate, with a large 

 solitary antheridium and very few paraphyses. Fruit unknown. 



HAB. With P. alopecurum on shaded limestone rocks in Ravensdale, Derbyshire ; 

 very rare. (Holt 1883) ! ! 



2. HOMALIA Bridel. 



Bryol. univ. 325 (1827). 



Stems creeping, stoloniferous, the secondary dichotomous and distich- 

 ously branched. Leaves complanate, divergent in two rows, unsymmetric, 



