420 
IV. MUSCl. 
[Tortula. 
simple, §■ in. long. Leaves reddish, spreading, subrecurved, twisted and 
crisped when dry, subligulate linear or lanceolate, acute or obtuse, keeled ; 
margin subreflexed ; nerve red, running to the apex ; cells minute. Fruit- 
stalk slender, •§• in. long, red. Capsule cylindrical-ovoid; teeth oblique, but 
hardly twisted ; operculum with a short beak. Inflorescence dioecious. — 
Trichostomum, Hook, and Grev. in Brewst. Journ. Sc. i. t. 12 ; T. fuscescens, 
Hook. f. and Wils. in FI. N. Z. ii. 73. t. 85. f. 1 ; Tortula rufiseta, Taylor. 
Northern Island: Bay of Islands, etc., Colenso, J. D. H. Generically intermediate be- 
tween Tortula and Didymodon, and perhaps a form of T. ccespitosa. Mitten identifies 
Trichostomum fuscescens with it. (Tasmania, Australia.) 
9. T. Knightii, Mitten in FI. Tasman, ii. 174. 1. 172./. 11. — T. cccspi- 
tosa, var., FI. N. Z. ii. 70. Stems in. high. Leaves pale yellow-green, 
spreading, crisped when dry, linear-lanceolate from an oblong broader trans- 
parent base, very acuminate ; margins quite entire, undulate throughout ; 
nerve slender, excurrent. Fruitstalk slender, pale. Capsule cylindric. 
Northern Island: Bay of Islands, J. B. H., Colenso ; Auckland, Knight. Very near 
the European T. Northiana. (Tasmania.) 
10. T. calycina, Scliwceyr. Suppl. t. 119; — Ft. N. Z. ii. 70. Stems 
very short, somewhat branched. Leaves yellow-green, subundulate, crisped 
when dry, narrow oblong-lanceolate, acuminate ; margin flat ; nerve stout ; 
cells small; periehsetial long, sheathing. Fruitstalk J- 1| in. long, red, 
yellow above. Capsule small, elliptic-oblong, suberect ; operculum with a 
very long slender beak. 
Northern and Middle Islands : Bay of Islands, Logan , Colenso, J. B. 3. ; Auckland, 
Knight; Nelson, Joltiffe, Travers. Apparently near T. jlexuosa (Hook. Muse. Exot. t. 
125) of South Africa, which has more erect leaves,, less undulated and broader below. 
(Australia, Tasmania.) 
4 
11. T. (Streptopogon) mnioides, Schwcey.: — FI. N. Z. ii. 71. Leaves 
yellowish, crisped, of firm texture, spreading, loosely imbricate, undulate, 
ovate-lanceolate, acuminate; margins pellucid, often gemmiparous at the apex. 
Northern Island, Colenso (scrap only). Doubtfully referred to the European moss ; it 
appears also to be Tasmanian. 
17. DIDYMODON, Bruch and Schimper. 
Short, tufted, monoecious or dioecious (rarely hermaphrodite) mosses, usually 
growing on earth. Leaves with minute cells above, larger at the base; nerve 
strong. Fruitstalk terminal, very slender, sometimes appearing lateral from 
the growth of shoots above it. Capsule oblong, erect ; annulus persistent 
or unrolling ; teeth 16, short, linear-subulate, excessively slender and fugaci- 
ous, entire 2-fid or perforated along the middle line, not united by a membrane. 
Operculum conical, obtusely beaked. Calyptra cucullate. 
A considerable genus, in both tropical and temperate regions, scarcely distinguishable from 
Trichostomum, except by the very tender fugacious peristome. 
Leaves 3-farious, erect and subsecund when dry, quite entire . ... 1. B. papillatus. 
Leaves with acute, recurved, squarrose apices, serrulate towards the 
apex 2. B. interruptus. 
Leaves twisted when dry, spreading, lanceolate, denticulate towards the 
apex 3. B. erubescens. 
