Gen. XV II. DIDYJIODON, Br. e¿ Schimp.
Peristomium breve, simplex; denies 16, lincari-lanceolati, sccus lincam mediam integri vel pertusi ct
bifidi, tenerriini, fugacissimi. Capsula, etc., ut iu Trichostomo.
1. Didymodon papilla tus {Hook. fil. et Wils. Fl. N. Zeal. p. 73. t. 85. f. 2 ); laxe cæspitosus,
caule elougîito rigidulo siibramoso, ramis filiformibus erectis, foliis trifariis patcnti-rccurvis ovato-lanceolatis
acuminulatis carinatis subsolidinerviis integerrimis utrinque papillatis, perichætialibus couvolutis, capsula
oblonga erecta, operculo conico-subulato.
H.^b. On the ground : New Country, J. D. II. ; Hobarton, Oldfield; the Hummocks, Archer.
D istk ib . New Zeaiaud, Swan Eiver, Australia.
Gen. X V III. CEEATODON, Bridel.
Pensiomium simplex; denies 16, lanceolati, ad basin fere bicrures, cruribus æqualibiis subulatis, basi
dense superne remote articolati, articulationibus proininulis, humiditate conniventes, siccitate spiraliter
incurvi. Capsula suberecta, oblonga, collo brevi, striata, sicca angulosa, pachyderma. Annulus duplex,
revolubilis. Operculum conico-rostratum. Calyptra cuculiata.—Eloresceutia dioica. Habitus inter DÏ-
cranoideum et Trichostomoideum ludeus.
I . Ceratodon p urpureus (Bridel, Br. Univ. i. 480) ; caule dichotome ramoso, foliis oblongo-lanceolatis
carinatis margine reflexis dorso papillatis patentibus siccitate subtortilibus nervo valido subexcurrente,
perichætialibus vaginautibus acuminatis, capsula in pedicello purpureo suberecta oblonga snbineurva
striata strumulosa siccitate cernua subhorizontali, operculo conico, peristomii dentibus in membrana basilari
sat producta bifidis margiue pallidioribus.—Br. et Sch. Bryol. Bur. t. 189. Dicranum purpureum, Hedw.
Sp. Muse. t. 36.
Var. 2 ; foliis suberectis confertis siccitate strictioribus, nervo crassiore, seta elongata.
H.-IB. Moist burnt ground : St. Patrick’s River. (Gwkjì, 1616.) (Oldfield, ZVi, ZZI, \%%) Back
River Gully, above Wellington Falls. (Oldfield, 310.) New Norfolk, J . B . II. On rocks and stones :
Western Mountains, Archer. Var. 2. On cow-dung, in bogs : North-west Bay, Oldfield.
D is t r ib . All p a r ts of th e world.
2. Ceratodon stenocarp ns (Br. et Schimp. iu Monogr. Ceratodon. p. 4, memoratus) ; dioicus,
habitus C. purpurei, capsula in pedúnculo flavido plus minus cylindrica cernua angulata evidentius strumosa,
peristomii deutibus brevioribus angustioribus fuscis subunicoloribus ad basin usque fere fissis.
H a b . On the ground; frequent in the bush. (Oldfield, 70.)
D i s t r ib . South Africa, Nilgherry Mountains, Mexico, Columbia.
Tribe V II. H e dw ig ia c eæ.
Gen. XIX. HEDWIGIA, Ehrh.
Peristomium nullum. Capsula globosa, immersa vel longius pedicellata, brevicolla, exannulata.
Operculum subconicum vel conico-rostratum. Calyptra minuta, conica vel cucullata. Flores monoici vel
dioici, masculi gemmæformes, axillares.— Eolia enervia, concava.
§ I . E ü r t s t o s iü m .— Rh izom a repens, subterraneum. F o lia laxe r e ticu la ta . Sporesp ra g ra n d e s.
•1. H edw ig ia repens (Hook. Muse. Exot. t. 106); rhizomate repente subterraneo, foliis surculi
f
sterilis patulis subortundis acuminulatis, fertilis conniventibus majoribus ovatis longe acuminatis apiee at-
tenuatis integerrimis laxc reticularis albcsccritibua membranaceis, capsula immersa in vaginulam brevissimam
sessili sphmrica ore dilatato, operculo conico-apiculato, calyptra minuta conica valde fugace, sporis prtegran-
dibua.— Fl. N. Zeal. p . 92. Lcptangium repens, Mitlen, in Journ. Linn. Soc. ined.
H a b . Port Sorrell, ami north side of Cataract, Launceston, Archer.
D is t iu b . New Zealand.
§1. ScLEBOSTOMUM.— Capsula Scleroderma, siccUute striala ; operculo rostrato. Calyptra cucullata. Folia
coriacea, rigida. Florescentia dioica.
1. H edw ig ia Humboldtii (Hook. Muse. Exot. t. 137) ; caule erecto pinnatim ramoso, foliis im-
bricatis obovatis concavis piliformi-acuminatis rigidis coriaceis, seta longiuscula, capsula subglobosa sulcata,
operculo rostrato, calyptra cucullata.—Anictangium, Bridel, Br. Univ.; Fl. Antarct. 135, 415.
Var. 0 . australis; caule breviore, foliis brevibus acuminatis immarginatis, seta brevi.
IIab. On moist trap rocks and in bogs : Mount Wellington, elev. 3000 feet, J. B . II. Penquite,
Gunn. Cheshunt, Archer.
D is t r ib . New Zealand, Australia, Antarctic Islands, South America, South Africa, Guadeloupe.
§ 2. H e d w ig ia .— Cap s« /« immersa, lævis. Operculum conicum. Calyptra mitræformis. Florescentia
monoica.
2. H edw ig ia cilia ta (Iledw. Muse. Frond, t. 40) ; laxe cæspitosa, caule decumbente subramoso,
foliis patentibus siccitate appressis ovatis hyalino-acumiuatis acumine papilloso serrato, perichætialibus longioribus
fìlamcntoso-ciliatis, capsula immersa suhsessili, operculo planiusculo, calyptra subpilosa.— Cryphæa
(Dichotomaria) microcyathea, C. Mueller, Bot. Zeit. 1851,p . 564, confi. Mitten, in Journ. Linn. Soc. ined.
H a b . On stones : near Lake Echo, J . B . H. On rocks : Cheshunt, Archer. Near Launceston,
Mossman.
D i s t r ib . Europe, America.
3. H edw ig ia imberbis (Hedicigidium, Br. et Schimp. Bryol. Eur. t. 274) ; cæspitosa, caule humili
subramoso, foliis patentibus siccitate appressis ovatis acuminatis margine revolutis, perichætialibus vaginantibus
lanceolato-acuminatis, capsula immersa pedicellata subglobosa, operculo conico, calyptra nuda.
Var. 0 . Brummondii ; foliis confertioribus minus acuminatis, operculo rostellato.— Schistidium Drummondii,
Taylor, Lond. Joum. Bot. 1 8 4 6 , 5 7 (foliisprorsus enerviis!).
H a b . On dry stones : near Hobarton, J . B . H. On rocks : Cheshunt, Archer.
D i s t r ib . Swan River, Australia, Europe.
Our specimens agi-ee with those from Swaa River, except that the leaves are less spreading, aud not subsecund.
Tribe V III. G r im s i iæ .
Geu. XX. GRIMMIA, Auct.
Peristomium simplex; denies 16, majusculi, lanceolati, trabeculati, cribrosi, simplices vel apice bi-tri-
fidi, siccitate reflexi. Calyptra mitræformis, basi lobata vel obliqua, cucullata.
§ 1. ScniSTiDiDM.— Calyptra lobata, solo operculo valde dilatato insidens. Capsula immersa. Operculum
una cum columella deciduum. Flores monoici.
.1. Grimmia apocarpa (Hedw. Muse. Frond, t. 39) ; laxe cæspitosa, foliis e basi erecta patentibus