— 93 — 



many of the records in the Census Catalogue of British Mosses have been based 

 upon barren specimens, viz., those whose leaves have a long strong single nerve. 

 When such plants are in fruit, the capsules are far from being subsphaerical. In 

 fact they are more like the capsules of the typical plant. The capsules of the 

 var. from the High Pyrenees are short, widely oval and turgid, quite different 

 from any of the capsules of the variety I know in the British Isles. Such being 

 the case, it will be well to have a variety that will include the, so-called records of 

 var. suhsphaericarpon of the British Isles. The long, strong single nerve is an 

 important feature and is found with plants widely distributed in. the British Isles. 

 The variety suggested is as follows: 



"Hypnum palustre Huds. var. dolichoneuron Ingh. & Rhodes, var. nov. 

 Plants often dark green with elongated stems, occasionally bright green, or brown, 

 usually more robust. Leaf nerve strong and long, reacting the apex or vanishing 

 just below it, always single. 



"Capsules variable in length and variously inclined, oblong or oval-oblong. 

 Occasionally the capsules are erect. 



"Hypnum palustre Huds. var. dolichoneuron Ingh. & Rhodes, [vel sub 

 Hygrohypno.] Plantulae saepe nigro-virides, nonnunquam laetevirentes aut 

 fuscae, caulibus elongatis, plerumque robustiores. Folia costa unica et crassa et 

 longa, ad apicem aut immediate subtus attingente. Thecae longitudine variae, 

 et varie inclinatae, oblongae aut ovali-oblongae, nonnunquam erectae. 



"Type-specimens — Chollerford (67), July /05, leg. H. N. Dixon, distributed 

 this year throughout M. E. C. 



"Habitat. On stones in and by streams, both in the lowlands and the high- 

 lands. W. I." 



We notice also an extract from an article in the Journal of Botany as con- 

 tributed to the Report (1916 p. 175) by Mr. W. E. Nicholson, and, although it is 

 not checked off by Mr. Rhodes, we quote it as being of some interest to American 

 bryologists: 



" Lepidozia sylvatica Evans, may generally be separated from L. setacea by 

 the smaller, more spreading leaves with smaller, less papillose cells, and, when 

 perianths are present, by the more shortly ciliate bracts and mouth of the perf- 

 anth. It is separable from L. trichoclados by having the bracts and the mouth oi 

 the perianth more longly ciliate, in which respect it occupies an almost exactly 

 intermediate position between L. setacea and L. trichoclados. L. sylvatica, in the 

 absence of perianths or female bracts, is with difficulty separable from L. tricho- 

 clados, but the presumption would be in favour of the plant from sandy ground or 

 sand rock being L. sylvatica, and one from peat being L. trichoclados. The tufts 

 of L. trichoclados are also generally thicker. 



"Involucral bracts (of L. sylvatica) much larger than leaves, innermost 

 ovate, generally bifid from a fourth to a third into two shortly ciliate segments, 

 cells generally longer and thinner-walled than in the leaves. Perianth narrowly 

 ovoid or cylindrical, contracted at the mouth, ciliate, the cilia i — 4 (mostly 3) 

 cells long." 



According to the Report, Mr. P. G. M. Rhodes is the official Distributor of 

 the Moss Exchange Club and some of the points which he has brought out in his 

 report are applicable as well to conditions in America as in the British Isles. He 

 notes that "most of the members now appear to have well-stocked herbaria 

 containing all bryophytes likely to be met with in ordinary districts. It now 

 remains to work out the form-cycles of the various species, for which purpose 

 off-type specimens of even the commonest species should be of service. Mr. 

 Wheldon's prediction of last year has already come true, and several common 



