72. Genus ANCECTANGIUM, Br. & Sch. 
Whole Plant — Perennial, fructification lateral, growing in brown or lurid tufts when young, yellowish-green, from 2 inches 
to 4 inches in height. 
Stem — Erect, slender, dichotomously branched. 
Leaves — Lanceolate, crowded, somewhat spreading, margin plane, faintly denticulate at the upper part of the leaf, entire 
at the base ; nerve pellucid, reaching nearly to the apex ; areolae round, small, dot-like in the centre and upper 
portion of the leaf, opaque, elongate at the base. 
iNrLOiiESCRNCE — Dioicous. 
BarreTif Zomer (Anthebidia) — Pew, paraphyses filiform. 
Fertile Flower (Aechegonia) — Slender. 
Vaginula — Cylindrical. 
Capsule — Ovate-oblong, erect, yellowish-brown, on a pale slender fruit stalk, mouth bright red. 
Calyptra — Cucullate,' subulate. 
Operculum — Convex, with a long oblique beak. • 
Peristome — None. 
Annulus — None, or very small. 
Spores — Minute, reddish. 
General Habitat — Wet rocks near waterfalls. Fruit ; — Autumn. 
Species Illustrated — Anoectangium compactum (Schwcegr.). Gymnostomum sestivum (Hook, and Tayl.). 
Reference to Plate — a, Plant, natural size; 6, Stem leaves, X 1-in. ; 66, Branch leaf, X 1-in. ; c, Apex of stem leaf, x i-in. ; 
d. Central cells of leaf, X i-in. ; dd, Basal cells, X j-in. ; e, Operculum, X 1-in. ; /, Capsule with 
calyptra, 2-in. ; //, Capsule, X 1-in. 
This genus is represented in Britain by two species, according to Hobkirk and Wilson. 
Both these authors are agreed as to the second species being very doubtful as British. Mr. Mitten refers it to Tortula 
Hiberrdca. 
73. Genus LEUCODON, Schwmgr. 
Whole Plant — Perennial, creeping, with erect branches and lateral fruit, dark green, height of branch about 1 inch. 
Stem — Creeping, from 1 inch to IJ inches long, branches erect. 
Leaves — -Ovate, plicate, entire, densely imbricated, nerveless, areolae round, small near the margin, elongated, narrow in the 
centre, dark green. 
Infloeescence — Dioicous. 
Barren Floiver (Antheridia) — 
Fertile Floiver (Aechegonia) — 
Vaginula — Cylindrical, curved. 
Capsule — Erect, oblong, smooth, reddish-brown. 
Calyptra — Cucullate, large. 
Operculum — Conical. 
Peristome — Single, composed of 16 yellow, linear, erect teeth. 
Annulus — " Fragmentary." 
Spores — Large, greenish-yellow. 
General Habitat — On trees, walls, rails and rocks; very rarely found in fruit, but has been met with in Sussex, the 
New Forest, and Yorkshire. Fruit : — November. 
Species Illustrated — Leucodon sciuroides (Schwaegr.). 
Reference to Plate — a, Plant, natural size; 6, Leaf, X 2-in.; c. Apex of leaf, X i-in.; d, Marginal and central cells 
X i-in. ; /, Capsule, X 2-in. ; jf, Portion of same, X 1-in. ; g, Teeth of peristome, X i-in. ; h, Spores 
X T-in. 
This genus is represented in Britain by two species. 
74. Genus ANTITRICHIA, Bridel 
Whole Plant — Perennial, procumbent, with ascending branches, fruit lateral, on a short curved seta, yellowish-green or 
dark green, ailecting mountainous districts. 
Stem— Straggling, procumbent, from 2 inches to 8 inches or more in length, with spreading branches. 
Leaves— Concave, ovate, erect, singularly serrated at the narrow apex, which is terminated with a hook, nerve trifid, 
areolse elongated, small in the central and upper portions of the leaf, dot-like at the margin. 
Inflorescence— Dioicous. 
Barren Flower (Antheridia) — Gemmiform, axillary. 
Fertile Floiver (Archegonia) — 
Vaginula — Clavate. 
Capsule — Oval, drooping, or erect, yellowish-brown, on a curved fruit stalk. 
Calyptra. — Cucullate, large. 
Operculum — Conical. 
Peristome — Double, composed of 16 yellow lanceolate outer teeth, and 16 narrow inner ones, united at the base. 
Annulus — None. 
Spores — Large. 
General Habitat — Upon trees and rocks, in mountainous countries. Fruit : — April. 
Species Illustrated — Antitrichia cnrtipendula (Bridel). Anomodon curtipendulus (Hook, and Tayl.) 
Reference to Plate—a, Plant, natural size ; 6, Stem leaf, X 2-in. ; 66, Perichaatial leaves, x 2-in. ; c. Apex of stem leaf, 
X i-in. ; d, Central and marginal cells of leaf, X i-in.; e, Vaginula, X 1-in.; /, Capsule, X 2-in. ; g, 
Operculum, X 1-in. 
This genus is represented in Britain by the species figured. 
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