66. Genus TETRAPLODON, Bruch & Sch. 
Whole Plant— Perennial, densely tufted, growing on decayed animal matter, erect, with imbricated leaves, from 3-inches to 
4-inches in height. 
Stem— Branched. 
Leaves— Lanceolate, with a long point obscurely serrated, or entire, concave, areolation loose, cellt hexagonal, nerve reaching 
nearly to the apex. 
Inflorescence — Monoicous. 
Barren Floii'er (AmR-ERiDJx) — Numerous, with clavate paraphyses. 
Fertile Floiver (Archegonia) — Few, without paraphyses. 
Vaginula — Ovate. 
Capsule — Oval, constricted below the mouth, colour dark red, on a long fruit stalk, neck of capsule obovate. 
Calyptra — Cuonllate. 
Operculum — Obtuse, convex. 
Peristome — Single, having 16 reddish teeth in pairs inserted below the edge of the mouth. 
Annulus — Wan tin g. 
Spores — Small, yellow. 
General Habitat— Chiefly on the mountains of England, Scotland, and Ireland in moist places, ou dung, or decayed animal 
substances. Fruit : — May. 
Species Illustrated — Tetraplodon mnioides (Bruch and Sch.). 
Reference to Plate — a, Plant, natural size; h, Stem leaf, x2-in.; bh, Portion of stem and leaf, X 2-in. ; c, Apex of leaf, 
X 1-in. ; d. Cells of mid-leaf, X 1 -in. ; dd, Basal cells, X l-in- ; e. Teeth of peristome, X 1-in. ; ee, Calyptra| 
X 1-in. ; /, Capsule, X 1-in. ; //, Same, X 2-in. ; g, Vaginula, X l-in. ; h, Spores, X i-in. 
This genus is represented in Britain by two species. 
67. Genus TAYLORIA, Hooker. 
Whole Plant — Perennial, erect, growing in very elevated situations on the ground, about IJ inches in height with an 
elongated fruit stalk. 
Stem — Csespitose, beset with radicles. 
Leaves — Spreading, lanceolate, or obovate-acuminate, serrated at the apex, nerve disappearing below the apex, areolae lax, 
cells hexagonal, or oblong-quadrate. 
Inflorescence — Monoicous. 
Barren Flower (Antheridia) — Numerous. 
Fertile Flower (Archegonia) — Few, styles slender. 
Vaginula — Oblong. 
Capsule — Erect, oval, with a long clavate neck on an elongated fruit stalk, colour red. 
Calyptra — Mitriform. , 
Operculum — Conical, obtuse. 
Peristome — Single, having 16 lanceolate teeth, or 32 cohering in pairs inserted below the mouth of the capsule. 
Annulus — Wanting. 
Spores — Small yellow. 
General Habitat — On the Scottish mountains, " Most abundant on Ben-Lawers " (Hook. Brit. Fl.). Fruit : — Autumn. 
Species Illustrated — Tayloria serrata, var. tenuis (Bruch and Sch.). 
Reference to Plate — a, Plant, natural size; h, Stem leaf, X l-in.; c. Apex of same, X i-in.; d. Basal cells, X i-in.; f, 
Capsule, X l-in.; ff. Same, X 2-in. ; g, Operculum, X l-in.; h. Spores, X T-m-; h Vaginula, X l-in. 
This genus is represented in Britain by the species figured. 
The normal form has not been found in Britain. 
68. Genus DISSODON, Greville. 
Whole Plant — Perennial, erect, densely offispitose, growing in patches of a dark lurid colour, fruit terminal on a long fruit 
stalk, height of plant from 2 inches to 4 inches, with dark radicles. 
Stem — Dichotomous. 
Leaves— Oval-oblong, obtuse, concave, entire, spreading, crowded, nerve ceasing below the apex, areolation lax, resembling 
that of Tayloria. 
Inflorescence — Synoicous. 
Barren Floiver (Antheridia) — Oblong, paraphyses, subclavate. 
Fertile Flower (Archegonia) — Few, styles slender, paraphyses filiform. 
Vaginula — Oblong. 
Capsule — Oval, erect, with a long tapering neck on a long yellow fruit stalk, colour of capsule greenish browner 
olive green. 
Calyptra. — Submitriform, whitish. 
Operculum — Conical, obtuse. 
Peristome-— Single, composed of 32 yellow lanceolate erect teeth, divided into 16 pairs transversely barred. 
Annulus — Wanting. 
Sjjores— Moderate size. 
General Habitat — On the Scottish mountains in turfy bogs. Fruit : — August. 
Species Illustrated — Dissodon splachnoides (Grev. and Arn.). 
Reference to Plate — a, Plant, natural size ; 6, Stem leaf, X 2-in.; c, Apex of same, X l-in. ; d, Basal cells, X l-in.; dd, 
Marginal and mid-leaf cells, X l-in. ; e. Teeth of peristome, X l-in; /, Capsule, X 2-in. ; g, Vaginula, 
X 2-in.; (/;/, Operculum, X l-in.; li, Spores, X i-m. 
Two species are given in Bryol. Brit, and in Hobkirk's Synop. as representing this genus in Britain ; but it appears 
very doubtful whether D. Froelichianus has ever been found. 
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