— 5 
of a difficulty in persuading myself that they were actual perforations, but 
Limpricht, Russow and Warnstorf are doubtless right in calling them indistinctly 
defined pores. These are entirely lacking in S. recurvum and bring the present 
species rather into relation with 5 . riparium, whose pores similarly appear 
in full detail only when the leaf is stained. Both species show the greatest 
pore-development in the middle side-regions; from here the pores extend 
over a greater or less part of the leaf’s surface. 5 . riparium tends to show 
on the outer surface several pores in the upper part of the cell, sometimes merg- 
ing to form a large elongated gap; on the inner surface the pores are numerous 
and rather large, particularly in the cells toward the edge of the leaf where they 
occur in rows along the commissures. In S. obtusum the pores are much smaller 
and generally less numerous, though they are subject to great variation in num- 
ber and distribution and even in size; those on the inner surface are most dif- 
ficult to make out. The specific rank of the plant seems indubitable: it lies 
quite midway between S. riparium and A. recurvum, but intergrades with neither, 
so far as my (limited) experience goes. 
Although widely spread in Europe and reported from a number of localities 
in Siberia, 1 2 3 it seems as yet to be a decided rarity in North America. Macoun 
was able to report it from Algonquin Park in Ontario, but of the scant specimen 
none remained behind in Ottawa, so that I am unable to confirm the identifica- 
tion. While examining the Greenland specimens of Sphagnum in the herbarium 
of Jensen at Hvalso in Denmark in the summer of 1910, I noted a specimen col- 
lected by Berggren at Tessiursak in 1870 labeled S. laricinum 3 which Herr 
Jensen and myself made out to be A. obtusum. I have since seen specimens from 
the same collection of Berggren in the herbaria of the museums of Stockholm 
and Copenhagen and note that H. Lindberg had already referred it to S. obtusum , 4 
along with another specimen collected by Berggren at Jacobshavn called S. re- 
curvum. It is well to the northward then that this species may be looked for, 
but from its European distribution there is no reason to suppose that it should 
not occur at least as far southward as A. riparium. 
To recur for a moment to Inophloea, I can record the finding of A. erythro- 
calyx in New Jersey in the summer of 1913. It was growing in quantity in the 
wet sand cleared of Chamaecyparis at the north side of Cedar Creek (Ocean 
County) where crossed by the automobile road near its mouth. This is the 
most northerly station for the species, unless Austin’s station was at Manchester 
(Lakehurst), as is probable. It occurred in various forms from well-developed 
plants to stunted fruiting ones and was so distinctive in general appearance that 
its identity was immediately suspected. I noted plants of the same species 
mixed with another species collected on the shore of the same stream where 
1 Cf. Jensen, Musci Asiae borealis, III, 15. 1909. Arnell, Zur Moosflora des Lena-Tales, 
2Sf. 1913 . 
2 Catalogue of Canadian Plants, VII, 183. 1902. 
3 That is 5 . laricinum in the sense of Angstrom (= 5 . Jensenii H. Lindberg), not in the original 
sense of Spruce. 
4 H. Lindberg, Bidrag till Sphagnum Cuspidatum-gruwpen 19. 1899. 
