Isothecium.~\ 
IV. MU SCI. 
467 
margin thickened, coarsely serrate ; nerve stout, keeled at the back, excurrent. 
Fruitstalks crowded, f in. high. Capsule horizontal, grooved ; operculum 
with a long beak. Inflorescence dioecious . — Hypnum Sieberi, C. Muell. 
Synops. ii. 504. 
Lord Auckland’s group. (Tasmania.) Very similar to I. comosum but more robust, 
greenish, not fulvous, branches decurved, lateral, not whorled. Leaves longer, more crowded, 
more serrated and striated, cells larger, nerve not cylindrical, keeled at the back. 
14. I. comatum, C. Muell. Synops. ii. 692. Habit and ramification 
of I. Sieberi, but branches fewer, not cuspidate. Leaves deep green, lax, 
patent, subsecund, rigid, cordate, lanceolate at the base, narrowed into a long 
subulate, setaceous, acutely-serrated apex ; nerve excurrent, stout, punctulate 
at the back, serrated at the cylindric point ; cells at the outer base large. 
Fruitstalks crowded, 3-^ in. long. Capsule pendulous, elongate, cylindrical, 
8-grooved, rather curved ; operculum with a long beak. — I. Colensoi, FI. 
Tasman, ii. 207. t. 176. f. 1. 
Northern Islands: Taranaki bills, Jupp, Kerr. Middle Island: Nelson, Travers ; 
Canterbury, Haast ; Otago, Hector and Buchanan. (Tasmania.) 
62. ENTODON, C. Muell. 
Stem compressed, decumbent or procumbent, pinnate. Leaves ovate, 
imbricate all round the stem, shining, 2-nerved at the base, entire. Fruit- 
stalk straight. Capsule erect, cylindric, regular. Peristome double ; outer 
teeth 16, rigid, not hygrometric, inserted below the mouth of the capsule, 
split at the apex; inner of 16 narrow cilia; annulus present or 0 ; columella 
exserted. Operculum short. Calyptra dimidiate. 
A enus, native of Europe and other countries. 
1XE. truncorum, Mitten. Tufts depressed ; stems pinnately branched. 
Leaves spreading, compressed, imbricated so as to form cuspidate ends to 
the branches, concave, oblong, acuminate, quite entire ; nerves very short ; 
upper cells narrow, basal quadrate ; inner perichaetial erect, convolute, with 
lanceolate-subulate apices. Fruitstalk short. Capsule erect, cylindric, pale 
red ; operculum subulate. 
Middle Island : Otago, Hector and Buchanan. Resembles the northern E. clado- 
rhizans, but leaves narrower, with more numerous distinct quadrate cells at the base. Peri- 
stome incomplete. (Mitten.) 
63. HYPNUM, Linn. 
Stems creeping, variously branched ; branches erect prostrate or pendu- 
lous, terete, or compressed. Leaves distichous or imbricated all round, often 
secund ; nerves 1, 2, or 0 ; cells and reticulation various. Fruitstalk lateral, 
slender, usually curved at the top and then smooth or scabrous. Capsule 
curved, horizontal, inclined or drooping, usually annulate ; terete (grooved or 
angled in § Acicularia ) ; peristome double, outer of 16 lanceolate teeth, 
marked with a middle line, inner surface trabeculate, inner a membrane cut 
to the middle into 16 keeled teeth with or without interposed cilia. Opercu- 
lum various. Calyptra cucullate, glabrous (hairy in II. pubescens) . 
