332 BRYOLOGY OF NEW ZEALAND. 
rhomboid, and markedly enlarged at angles of the leaf. Capsule 
oblong or cylindric, inclined, curved, frequently striate when dry. 
Lid short. 
Key. 
Autoicous. Leaves acutely pointed ....__..... 1. denticulatum 
Dioicous. Leaves widely pointed, almost obtuse 2. novae- 
seelandiae 
1. Plagiothecium denticulatum (L.) Bry. eur., loc. cit. 
Syn. Hypnum denticulatum Linn. sp. pl. ed. 2, 1, p. 1122; 
Handb. N.Z. Fl., p. 482. Hypnum lamprostachys 
(Hampe) Jaeg. Adumbr., ii, 515. 
Hypnum lamprostachys Hampe is certainly only P. denticulatum. 
The distinguishing characters suggested Hampe, of nerve and leaf 
form, are perfectly applicable to the ordinary European forms of 
P. denticulatum. 
2. P thecium novae-seelandiae Broth. in Proc. Linn. Soc. N.S.W. 
xli, 594 (1916). 
r as I can judge, this differs from P. denticulatum solely 
in the dioicous inflorescence. Brotherus, it is true, describes the le 
a : 
specific status of P. novae-seelandiae therefore, is somewhat open to 
question. It is not, however, the allied dioicous P. silvaticum. 
IsopTreRYGiuM Mitt., Muse. austr.-amer. in Journ. Linn. Soe., Bot., 
xii, 21 (1869). 
Differs from Plagiothecium in the generally more slender growth, 
narrower, often finely acuminate leaves, and especially in the very 
narrow cells, not or scarcely enlarged at the basal angles. 
