NeckeracE/E.] 199 \Homalia. 



Hab. — On stones and banks in damp shady woods. Fr. 11 — 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. /?. 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 ANGUSTIFOLIUM {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. fT. CXX, B.) 



Syn. — Thamnium angustifolium Holt Journ. Bot, 1886, p. 65, t. 265. Limpr. in Rabenh. D. kr. 

 fl. Laubm. iii, 243 (1897). 



Porotrichum angustifolium 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, squampse, 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. 



