20. Genus OAMPYLOPUS, Bridel 
Whole Plant — Perennial, erect, yellow-green, ceespitose, varying from j inch to 3 inches in height densely leafy. 
Stem — Dichotomously branched, with reddish or purple radicles, tnfted, and brittle. 
Leaves — Imbricated, crowded, mostly in eight rows, erect, somewhat rigid, much acuminated to a subulate or setaceous 
point, which is denticulate, dark green, or blackish in some species, yellowish-green in others ; nerve very prominent 
and broad ; areolae snbquadrate at the base, elongated above. 
Infloeescence — Dioioous. 
Barren Flower (Antheeidia) — Oblong, having long filiform paraphyses. 
Fertile Flotuer (Aechegonia) — Aggregate. 
Vaginula — Oblong. 
Capsule— Ovate, striated, drooping, on an arcuate fruit stalk, yellowish-brown when young, but when matured 
rich brown, in some species several on the same stem. 
Calyptra — Large, beautifully and delicately fringed at the base. 
Operculum — Rostrate. 
Peristome — Single, having 16 narrow elongated bifid teeth, bright red. 
Annulus — Large. 
Spores — Small. . 
General Habitat — On wet rocks, turfy bogs, on moist heathy places, &c. Fruit : — October, November, and March. 
Species Illustrated— Campyl opus flexuosus (Dill.), Dicranum flexuosum (Hedw.), and in part C. torfaceus (Br. & Sch). 
Reference to Plate — a, Plant, natural size, C. flexuosus; ad. Portion of branch, X 2-in. ; h, Stem leaves, X 2-in. ; hh, Base of 
stem leaf, X 1-in.; c, Apex of same, X i-in- ; '-^t Portion of mid-leaf, X i-in. ; e. Teeth of peristome, X 
^-in. ; /, Capsule and Calyptra, X 2-in. ; ff, Capsule with teeth, X l-in. ; h, Stein leaf of C. torfaceus, 
X 2 in. ; i, Apex of same, X i in. ; fc, Horizontal section of same, X 1-in. 
This genus is represented in Britain by thirteen species, according to Hobkirk. In Wilson's Bryo. Brit, six species only 
. are given, seven species having been since discovered. 
21. Genus POTTIA, Ehrh. 
Whole Plant — Annual, loosely tufted or single, short, from i to f an inch in height, erect. 
Stem — Very short and simple. 
Leaves — Spreading, erect, concave, piliferous, entire, rather broad ovate-oblong, lamellate ; nerve strong, excurrent, areola- 
tion hexagonal upwards ; basal cells quadrate. 
iNrLORESCENCE — Monoicous. 
Barren Flotver (Antheeidia) — Occasionally gemmiform, 3 or 4 together, with filiform paraphyses. 
Fertile Flower (Archbgonia) — Having long styles, with few paraphyses. 
Vaginula — Oblong. 
Capsule — Ovate-oblong, on an erect fruit stalk, varying in length, colour reddish-brown. 
Calyptra — Cncullate, usually smooth. 
Operculum — Convex or flattish, with a somewhat long oblique beak. , 
Peristome — Wanting. 
Annulus — When present, simple. 
Spores — Moderately large, granulated, colour ochraceous. 
General Habitat — On clayey and sandy banks, fallows, and frequently on mud walls, and also on moist banks near the 
sea. Fruit : — February, April, and May. 
Species Illustrated — Pottia cavifolia (Ehrh.), Gymnostomum ovatum (Hedw.). 
Reference to Plate — a. Plant, natural size; aa. Same, X 2-in.; 6, Stem leaves, X 2-in.; 66, Same, X 1-in.; c. Apex of leaf, 
X i-in. ; d, Cells of mid-leaf, X i-in. ; e. Basal cells of leaf, X ?-in. ; /, Capsule X 2-in. ; fj, Calyptra, 
X 1-in.; (?, Vaginula, 1-in. ; h. Spores, X T-in- ; Antheridia with paraphyses, X i-ia. 
This genus is represented in Britain by nine species. 
22. Genus ANACALYPTA, Bohl. 
Whole Plant — Annual, or biennial, gregarious, similar in growth to Pottia, from j to J inch in height. 
Stem— Short, varying in height from 1 line to i inch. 
Leaves — Spreading, ovate-acuminate, in one species oval ; margin revolute; upper leaves larger, with a strong prnminent 
nerve, colour bright green ; areolation small and dense above, quadrate at the base. 
Infloeescence — Monoicous. 
Barren Floiver (Antheeidia) — Occasionally gemmiform. 
Fertile Flower (Aechegonia) — 3 to 4, with longish styles. 
Vaginula — Oblong. 
Ca/psule — Oval on a straight fruit stalk. 
Calyptra — CucuUate, shorter than the capsule. 
Operculumi — More or less rostrate. 
Annulus — Persistent, simple. ' 
Peristome — Single, having 16 teeth, variable in form, united at the base. 
Spores — Small. 
General Habitat — Chalk hills, calcareous soil, and clayey banks, fallows, and fields. Fruit : — January, March. 
Species Illustrated— Anacalypta Starkeana (Nees & Hornsch.), and Auacalypta lanceolata (Eohl.), in part. 
Reference to Plate — a, Plant, natural size, A. Starkeana; aa, Same, X 2-in. ; b. Stem leaves, X 1-iu.; e, Young capsule and 
calyptra, X 2-in. ; /, Capsule, X 2-in. ; ff, Teeth of peristome, X i-in. ; g, Operculum, x 2-in. ; ah, Plant, 
natural size, A. lanceolata ; c> Spores, x i-in.; d, Stem leaf, X l-ia. ; h, Calyptra, X 1-in.; t, Vaginula, 
X 1-in. 
This genus is represented in Britain by four species, according to Hobkirk and Wilson. 
