BRYACEAE. 199 
Poutia Hedw., Desr., i, p. 96 (1787); Lindb., Muse. Scand., p. 17 (1879). 
ebera Hedw., Fund., ii, 95 (1782). 
A genus not easy to separate from Bryum by well-defined characters, 
but in seat not difficult to recognize; the narrow areolation (except 
in P. albicans), usually narrow leaves, cilia of endostome not distinctly 
appendiculate, «&c., being usually marked and distinctive, 
I have included two species, P. albicans and P. tasmanica, separated by 
recent authors under Mniobryum, a genus which scarcely seems to me 
sufficiently distinct to be retained. P. Binnsii also belongs to this group. 
KEY TO THE SPECTEs. 
( Leaves narrowly linear-subulate, with long, — eee 
1.4 exuose poin 1. tenuifolia. 
| Leaves ovate to lanceolate, not longly acuminate : 
Robust ; ert 3-5 mm. long, when ary glossy, with an 
2, almost iridescent sheen «. 2. cruda, 
| Much aati or, if robust, leaves not or sy ‘glossy ue 3 
(Tall, soft plant; leaves ovate-la margin ade 
3. cells lax, pellucid, thin- valed: rea 5-6 is 1) -. 6, albicans, 
Leaves narrower, lanceolate ; cells much narrow i 4 
Cells linear, subvermicula 5 
Cells wider. Gesatabentbed: pellucid 6 
Capsule ovoid, poe ri paroico as .. 3. nutans, 
Ca genes su neck gudus equalling the 
oy rangium ; cous a ig .. 5. novae-seelandiae, 
Dioicous ; nerve ceasing below apex 7. tasmanica. 
Synoicous or Laptare bes nerve ® percurrent or shortly ex- 
current 4. nutanti-polymorpha., 
1. Pohlia tenuifolia ce f. & W.) Broth. in Engl. & ei Pflanzenfam., 
Musci, i, 549 (1903). 
Syn. Bryum tenurfolium H. f. & W. in Sea Mee? pote - (1844), 
p. 546; FI. N.Z., ii, 83; Handb. N.Z. Fl B. Wal. 
R. Br. ter. in Trans. N.Z. Inst., vol. 31, p. 457 Ate). B. Whittonii 
R. Br. ter., ye eit., vol. 35, p. 334 (1902). B. Barrii R. Br. ter., 
op. et loc. ¢ 
Very distinct from all the remaining species in the leaves, longly and | 
' narrowly linear-subulate, entire. The capsule is very small, narrowly oval, 
from horizontal to subpendulous, the seta very slender; peristome pale 
yellow, a of endostome finely papillose, scarcely split : cilia variable, 
often rudimentary. 
Orthodontium sulcatum, somewhat similar in the foliage, differs at once 
in the capsule. 
No specimens of B. Walkeri or B. Whittonai occur in Brown’s herbari 
but the descriptions and figures leave little or no doubt that they a 
to this species, as does also B. Barrii, from type specimen. 
It occurs in both Islands, and is probably not uncommon. It is 
mcdaiok Fae one locality in New South Wales, but otherwise is unknown 
outside New Zealand. 
