252 BRYOLOGY OF NEW ZEALAND. 
Fleischer Parga ly ciel p. sik a to a ‘‘ C. trichoides 
(Hook.) H. f. & Wils. from New Zeala n Herb. C. Mueller. I 
cannot trace this name, and sane no rae it: is a lapsus calami for 
C. ericoides 
PTYCHOMNIEAE. 
PTYCHOMNION Mitt. in Journ. Linn. Soe., Bot., xii, 536 (1869). 
1. Ptychomnion aciculare (Brid.) Mitt. op. et loc. cit. 
Hy Gest A Rheteds Brid. tg ree. 1, (PS, 168 
(1801); F a 110; Handb. N.Z. FIL, p. 480. P. 
c guste vote L) P r. Ind, p. 1060. Hypnum cygnisetum 
C.M. i n Flora, beviii, “495 (18 85). 
rugose when eee with dee or shorter, flexuose, coarsely toothed 
acumen; the wiry, blackish seta, and cylindrical, deeply plicate cap- 
sule. The leaf arrangement varies in density, but it is generally 
sufficiently lax to allow the blackish stem to be seen, though fre- 
quently it is quite hidden. mall forms oceur, occasionally with 
leaves scarcely half the normal size, but structurally not distinct. 
Fr. 0 ygnisetum (C.M.) is separated entirely on the more robust 
habit and ‘‘ eygneo-flexuosus ’’ seta. The most robust forms of P. 
person often have a straight seta, so that the former character can 
have no weight; and as many of the Chile specimens in Herb. Hook. 
have setae varying from quite straight to strongly arcuate on the 
same plant, it is — clear that the character—and the species based 
on it—is valueless 
EXCLUDED SPECIES. 
PTYCHOMNION DENSIFOLIUM (Brid.) Jaeg. Adumbr. ii, 617. 
sale ae densifolium Brid. Sp. M. ii, 204 (1812) ; Handb. 
N.Z. F1., p. 480 
hoe species was ene ae from specimens collected in Tristan 
d’Acunha, and is credited to New Zealand on the strength of a plant 
on “Wellingto on, coll. Stephenson, in Herb. Mitten, in the Handbook, 
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the New York Bot. Garden, by the kindness of Mrs. Britton, part of 
d’Acunha plant, of which plentiful material exists at Kew, is very 
similar to these small forms, and is very constant in size and habit, 
as well as, apparently, in structure; the leaf acumen is very markedly 
erent from that of P. aciculare; i in the latter it is sometimes gradu- 
ally but usually abruptly narrowed to a long, rigid, more or less lori- 
form, half-twisted acumen, coarsely and rather distantly toothed. The 
length of the acumen varies a good deal in different plants, and here 
