38. Genus TBTRAPHIS, Eedw. 
Whole Plant — Perennial, bright green above, reddisb-brown below, from \ inch to 1 inch in height. 
Stem — Slender, erect. 
Leaves — Upper ones lanceolate, light green, on the fertile stem ; lower leaves ovate, lanceolate, reddish-brown, with a plane 
entire margin, nerve ceasing below the apex; areolte pellucid, dot - like ; leaves on the barren stem broadly 
obcordate. 
Inflorescence — Monoicons. 
Barren Flower (Antheridia) — Terminal, gemmiform, with filiform paraphyses. 
Fertile Flower (Archegonia) — Pew. 
Vaginula — Oblong. 
Capsule — Erect, elliptical, on a long fruit stalk, terminal, solitary, reddish-brown, mouth having a bright red 
border. 
Calyptra — Mitriform, plicate, torn at the base. 
Operculum — Conical beak short. 
Peristome — Simple, with 4 equally divided conical or pyramidal triquetrous teeth, having longitudinal lines. 
Annulus — None. 
Spores — Rather small, smooth, yellow. 
General Habitat — Oa a peaty soil in shady places and decaying stumps of trees. Pruit: — September. 
Species Illustrated — Tetraphis pellucida (Hedw.). 
Reference to Plate — a, Plant, natural size ; ah, Same, X 2-in. ; h, Leaf of same, X 2-in. ; ih, upper stem leaves X 2-in. ; 
c. Branch leaf, X 2-in.; e, Calyptra, X 2-in.; /, Capsule with teeth of peristome, X 1-in. ; 
//, Capsule with calyptra, X 1-in.; g, Operculum, X 1-in. 
This genus is represented in Britain by the species figured. 
39. Genus TETRADONTIUM, Schwaeg. 
Whole Plant — Annual, or biennial, gregarious, minute. 
Stem — Scarcely any, or none. 
Leaves — Ovate, lanceolate, concave, imbricated; areote oval in the centre and upper portion of the leaf ; basal cells elon- 
gated ; nerves ceasing below the apex ; radical leaves long, linear, clavate, flattish, thickened upwards, entire, 
formed of layers of cellules, nerve nearly the width of the leaf, brown. 
Inploeescbnce — Monoicous. 
Barren Flower (Antheridia) — Small. 
Fertile Flo-joer (Archegonia). 
Yaginula — Cylindrical. 
Capsule — Oval, oblong, solitary, erect, on a long upright pedicel, light brown. 
Calyptra — Large, plicate, mitriform. 
Operculum — Conical, beak short, acute. 
Peristome — Same as Tetraphis, with shorter teeth. 
Annulus — None. 
Spores — Small, smooth, yellow. 
General Habitat — On sandstone and on rocks. Pruit : — July. 
Species Illustrated — Tetradontium Brownianum (Dicks.). 
Reference to Plate — a, Plant, natural size; oa. Same, X 2-in.; h, Root-leaves, X 1-ia. ; c. Apex of same, X i-in. ; bh, 
Stem leaf, x 1-in.; cc. Apex of same, X i-in. ; d. Basal cellules of same, X i-in. ; e. Teeth of peris- 
tome, X 4 -in.; /, Capsule, X 1-in.; g, Operculum, X 1-in. 
This genus is represented in Britain by the species figured. 
40. Genus BUXBAUMIA, Haller. 
Whole Plant — Annual or biennial, resembling a fungus, stemless, partially concealed in the soil, from | an inch to 1 inch 
in height. 
Leaves — Lanceolate, irregularly and deeply toothed, few ; areoto, oblong, large, surrounded with long filiform rooting 
fibres, nerveless, reddish. 
In florescence — Dioicous. 
Barren Flower (Antheridia) — Gemmiform, solitary. 
Fertile Flower (Archegonia). 
Vaginula — Ovate. 
Capsule — Large, oblique, ovate, flat at top, with a raised border, convex, and swelling beneath, reddish-brown. 
Calyptra — Small, obtuse. 
Operculum — Conical, obtuse, small. 
Peristome — "According to Bruch and Schimper double, outer one divided into irregular moniliform reddish 
teeth, inner peristome pale whitish" (Wilson). 
Annulus — None. 
Spores — Small. 
General Habitat — " On soil or decaying wood." Yorkshire, Scotland. Rare. Fruit : — May. 
Species Illustrated — Buxbaumia aphylla (Haller). 
Reference, to Plate — a. Plant, natural size ; 6, Radical leaves, X 1-in. ; c. Capsule, X 2-in. ; d, Lateral view of same, X 
2-in.; e. Stem leaf, X l-in- ; f> Operculilm, X 2-in. 
This genus is represented in Britain by the species figured. 
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