1. Genus ANDREW A, Ehr. 
Whole Plant — Perennial, erect, rigid, f to 1 inch in height ; very like a Jungermannia. 
Stem — Tall, tufted or csespitose, branches of an equal length. 
Leaves — Imbricated, concave, ovate, lanceolate, entire, nerve absent in some species, but present in others ; areolae dot- 
like, apical cellules hexagonal, those of the mid-leaf ovate, basal cells elongated, colour dark purplish brown; 
perichsetial leaves convolute.- 
Inploeescence — Both monoicous, and dioicons. 
Barren Flower (Antheeidia) - Oval, few. 
Fertile Flower (Archegonia) — Few. 
Capsule — Opening by 4 segments, cohering at the summit ; erect on a stalked receptacle. 
Calyptra — Mitriform, thin, irregularly torn. 
Operculum — Persistent, adhering to the capsule. 
Annulus — None. 
Peristome — Wanting. 
Spores — ^Small. * 
• General Habitat — Alpine situations. Fruit: — Summer. 
Species Illustrated — Andresea Alpina. (Dill., Linn.). 
Reference to Plate — a, Natural size of plant; 6, Leaves, X 2-in. ; c, Apex of leaf, X i-in. ; cc, Basal cells, X 1-in. ; 
d, Mid-leaf cells, X 1-in. ; /, Capsule, X 2-in. ; g, Calyptra, X 2-in. 
• This genus is represented in Britain by nine species, according to Hobkirk, all affecting alpine situations, four being 
nerveless, five having the nerve present. 
2. Genus SPHAGNUM, Dill. 
Whole Plant — Large, aquatic, perennial, in dense patches, colour usually white, sometimes green or reddish, from 3 or 4 
to 12 inches in height. 
Stem — Eobust, erect, simple or forked, woody with large membranous cells ; branches spreading. 
Leaves — Erect, concave, more or less obtuse, ovate, elliptical, nerveless, beautifully reticulated, cellules lined with spiral 
filaments and minute pores, very similar to network, filled more or less with chlorophyll. 
iNrLOEESCENCE — DioicOUS. 
Barren flower (Antheridia) — Eoundish, pedicellate. 
Fertile flower (Aechegonta) — Sessile in the axis of a fascicle, presenting the appearance of a lateral branch. 
Capsule — Globular. 
Calyptra — Persistent, surrounding the ripe capsule. 
Operculum — Flattish. 
Peristome — None. 
Spores — Small. 
General Habitat — Common in bogs, on heaths, and in marshes. Fruit : — July. 
Species Illustrated — Sphagnum cymbifolium, (Dill., Ehr.). 
Reference to Plate — a, Plant natural size ; 6, Stem leaf, X 2-in ; 6b, Leaves and portion of stem X 2-in. ; c. Apex of leaf, 
X 1-in. ; d, Cells of leaf, X ^-in. ; e, Operculum, X 2-in. ; /, Capsule, X 2-in. ; g, Horizontal section of 
stem, X ¥-in- 
This genus is represented in Britain by 15 species and varieties, according to Dr. Braithwaite's division. — Vide 
Monthly Microscopical Journal. 
3. Genus ARCHIDIUM, Bridel 
Whole Plant — Perennial, small, rarely exceeding ^ inch in height, csespitose. 
Stem — Short, erect, occasionally procumbent, branched. 
Leaves — Branch leaves — Alternate, lanceolate, entire, nerve strong and prominent, disappearing usually below the apex ; 
cells large, irregular; marginal ones more evenly disposed, quadrate ; perichcstial leaves — ovate; lanceolate, denti- 
culate near the apex. 
Infloeescence — Monoicous. 
Barren Flower (Antheeidia) — Gemmiform, in the axils of the perichsetial leaves. 
Fertile Fhiver (Archegonia) 
Vaginula — Short, roundish. 
Capsule — Globular, sessile. 
Calyptra — Thin, irregularly torn. 
Operculum — Wanting. 
Peristom.e — Wanting. 
Spores — Large, angular. 
Geneeal Habitat — Moist heaths, on a clayey or chalky soil. Fruit : — March — April. 
Species Illusteated — Archidium Phascoides (Bridel). 
Reference to Plate — a, Plant natural size ; 6, Leaves of stem, X 2-in. ; hh, Portion of stem and leaves, X 2-in, ; c, Apex of 
leaf, X i-in. ; d, Cellules of mid-leaf and marginal ones, x ?-in. ; e, Basal cells of leaf, j-in.; /, Capsule 
with perichsetial leaf, J-in. 
This genus is represented in Britain by the species figured, and has often been confounded with Phascum 
alter nifolium, (Hedw.) 
1 
