416 
IV. MUSCI. 
[. Trichostomum . 
15. TRICHOSTOMUM, Bridel. 
Usually tufted, short, green, slender, monoecious or dioecious mosses, 
growing on earth or rocks. Leaves narrow ; cells minute above, large at the 
base ; nerve strong, continuous or excurrent. Fruitstalk terminal. Capsule 
long, erect ; annulus present or absent ; teeth 32, in one row, approxima- 
ted in pairs, filiform (very short in T. mutabile), tetragonous, granulate, 
closely barred, twisted inwards. Operculum elongate, obliquely beaked. Ca- 
lyptra cucullate. 
A large genus, both tropical and temperate, very closely allied to Tortula, and often 
hardly distinguishable. The teeth sometimes appear as 16, simple or perforated. 
I. Pilopogon. — L eaves with a hair-point 1. T. leptodum. 
II. Leaves linear, ligulate or lanceolate. 
Leaves crowded, linear-oblong, erect when dry ; margin reflexed ; 
nerve vanishing 2. T. linyulatum. 
Leaves oblong- lauceolate, acute, concave at the apex ; margin flat 3. T. phceum. 
Leaves linear-lanceolate ; nerve excurrent ; margin flat 4. T. mutabile. 
Leaves crowded, lanceolate, obtuse, concave at the tip ; nerve ex- 
current ; margins undulate 5. T. rubripes. 
III. Leaves broad and sheathing below, above subulate, setaceous. 
Leaves flexuous, lower J ovate. Capsule oblong 6. T. laxifolium. 
Leaves spreading, lower \ oblong. Capsule cylindric . ... 1 . T. elonyatum. 
Leaves strict, lower j ovate-lanceolate, keeled 8 .. T. setnsum. 
Leaves flexuous, lower \ linear-oblong, upper part denticulate . 9. T. australe. 
1. T. (Pilopogon) leptodum, Mitten, mss. — Campylopus leptodus, 
Montngne ; — FI. N. Z. ii. 68. Stems tufted, proliferous ; branches fascicled. 
Leaves lanceolate-subulate, strict, with a short, white, toothed hair-point, 
upper recurved ; nerve slender. Fruitstalks crowded, flexuous. Capsule ob- 
long, straight, smooth ; teeth divided nearly to the base, divisions very long 
and slender ; operculum subulate. 
Northern Island, Colenso, in various places ; Auckland, Kniyht. (Habit of a Campy - 
lupus.) 
2. T. lingulatum, Hook. f. and Wits. FI. N. Z. ii. 71. t. 84./. 4. 
Stems very short, £ in. high. Leaves pale, spreading, crowded, rather 
flaccid, erect when dry, linear-oblong or ovate-lingulate, obtuse, keeled ; 
margins slightly reflexed; nerve vanishing; cells rather large. Fruitstalks 
| in. long, pale. Capsule erect, cylindric ; annulus 0 ; operculum conico- 
subulate. 
Var. 0. Leaves longer ; capsule subcylindric ; operculum longer, beaked. 
Northern Island: Bay of Islands, J. 1). H. Var. 0. Colenso. 
3. T. phseum, Hook. f. and JVils. Ft. N. Z. ii. 72. t. 84./. 5. Stems 
very short, tufted in. high. Leaves purplish-brown, erecto-patent, rather 
dense and rigid, opaque, crisped when dry, oblong-lanceolate, keeled, acute, 
concave at the apex; margin flat, entire, opaque; nerve continuous, pellucid. 
Fruitstalk stout, •§• in. long. Capsule large, erect, oblong, dark red; teeth 
imperfect, connected by a basal membrane, oblique. 
Northern Island : shores of Lake Waihau, Colenso. Specimens insufficient. 
4. T. mutabile, Bruch; — Ft. N. Z. ii. 72. Stems tufted. Leaves 
