466 
IV. MUSCI. 
\Isothecium. 
margin and strong nerve serrated at the back ; nerve often vanishing below 
the apex ; cells narrow. Fruitstalk 2-3 in. high. Capsule suberect or pen- 
dulous, smooth, large, oblong-cylindrical, not grooved ; mouth not contracted; 
operculum short, conical. — Hypnum, Hook. Muse. Exot. t. 33. 
Common throughout the islands, Menzies , etc. 
9. I. KLerrii, Mitten inJonrn. Linn. Soc. iv. 86 ( Tracliyloma ). Habit and 
appearance of I. Menziesii. Leaves ovate, acute, toothed ; nerve slender, ex- 
current, toothed at the back. Capsule unequal, horizontal, not grooved ; 
operculum conic with a short beak. 
Northern and Middle Islands: apparently common, Auckland, Jolliffe ; Wellington, 
Stephenson; Waikehi, Sinclair ; Canterbury, 'leavers; Otago, Hector and Buchanan. 
10. I. spininervium. Hook. f. and Wits. FI. N. Z. ii. 105. Stems 
robust, erect, 2-3 in. high, fastigiately branched at the top ; branches simple, 
spreading. Leaves glossy, bright green, subdistichously imbricate, ovate, 
acute, serrated at the margin and back ; nerve solid. Fruitstalk f- lg- in. 
high, erect or arched at the top. Capsule oblong, cylindric, grooved, cer- 
nuous ; operculum with a slender beak, shorter than the capsule. — Hypnum., 
Hook. Muse. Exot. t. 29. Rhacopilum, C. Muell. 
Var. 0. arcuatum. Fruitstalk short, arcuate . — Hypnum arcuatum , Hedvvig, Sp. Muse, 
t. 62. Pterigophy/lum, Bridel, Bryol. ii. 348. Tracliyloma, Mitten. 
Abundant throughout the islauds, Menzies, etc. (Tasmania, Java.) 
11. I. marginatum, Hook. f. and Wils. FI. N. Z. ii. 106. t. 89. /. 2. 
Stem robust, erect, red, 2-4 in. high ; branched at the top ; branches whorled, 
pinnately divided, decurved. Leaves dull green, crisped when dry, ovate- 
oblong or oblong-lanceolate, acute, rather concave ; margin thickened, ser- 
ndate; nerve thick, spinulose at the back. Eruitstalk crowded, stout, 1-1 £ 
in. high, arcuate at the top. Capsule cernuous, cylindrical, grooved ; oper- 
culum with a slender beak. — Hypnum limbatum, Sullivan! ? 
Northern and Middle Islands; common in moist forests. Mitten inclines to suppose 
that Hypnum limbatum is only a young state of I. marginatum (see under Hypnum). 
12. I. comosum, Hook. f. and Wils. FI. N. Z. ii. 106. Stems very 
stout, rigid, 1-3 in. high, densely covered with matted radicles; branches in 
one or more crowded wdiorls, stout, suberect or horizontal, somewhat pin- 
nately divided. Leaves rigid, dusky-green, reddish when dry, spreading, 
subsecund, ovate-lanceolate, with a rigid subulate apex ; margin serrate ; 
nerve terete, not keeled, smooth at the excurrent point. Eruitstalks 
usually numerous, crowded at the top of the stem, stout. Capsule cernuous 
or pendulous, subcylindric, grooved ; operculum nearly as long as the cap- 
sule, beak slender. — Hypnum, Labill. FI .Nov. Holl. ii. t. 253, Schwaegr. 
Suppl. t. 91. Tracliyloma, Mitten. 
Abundant throughout the islands, and in Lord Auckland’s group and Campbell’s 
Island. A stout handsome moss. (Tasmania, Australia, Java.) 
13. I. Sieberi, Hook. f. and Wils. FI. Tasman, ii. 296. Stem stout, 
erect, tomentose, 1-4 in. high, branched from the sides ; branches not 
whorled, stout, deflexed, subcuspidate. Leaves green, not fulvous, crowded, 
erecto-patent, narrow'-lanceolate, gradually acuminate, striate when dry ; 
