FLORA VITIENSIS. 403 
coalitis.—Island of Wakaya, Viti (Milne!). Also in Samoan Islands, Tutuila, on stones, rocks, and 
roots of trees in shady places (10-50 feet) (Powell! 29). 
In size and mode of growth this agrees nearly with Pelekium velatum, but its fruit and calyptra are 
those of Thuidium. 
2. NEMATODONTES.— Peristomii dentes e filis liberis vel in processus dentiformes coalitis compositi. 
TRiBus XI. POLYTRICHEJE.— Peristomii dentes breves, apicibus ad columellæ apicem 
in tympani formam expansum adherentibus. 
An extensive tribe of Mosses, with a somewhat creeping, subterraneous rooting stem, from which arise 
erect, usually simple, very rarely branched, and subdendroid stiff stems, clothed with frequently firm and 
rigid leaves, scarcely altered in drying; in some species, however, they are soft and curled when dry. Тһе 
fruit arises from the apex of the stem, and is usually borne on a stout seta. The capsule is either cylin- 
drical and smooth, or more or less strongly angled, even sometimes cubical. The calyptra is almost naked, 
or more or less completely covered and hidden by appressed hairs. 
XXV. Pogonatum, Brid. Theca cylindracea, levis vel indistincte plicata. Calyptra indumento 
villoso obtecta. 
P. aloides, Hedw., is confined to the Hawaiian Islands (Gaudichaud). 
l. P. Vitiense (sp. nov.), Mitt.; caulis elongatus, simplex vel innovans; folia subimbricata, 
a basi latiore erecta pellucida, cellulis inferioribus oblongis, superioribus abbreviatis transverse 
oblongisque areolata, inde in folium oblongum patenti-incurvum acutum planiusculum intus lamellis 
brevibus ubique obtectum producta, margine apicem versus denticulis paucis serrulata, perichætialia 
longiora, a basi erecta longiore latioreque late ovali cæterum caulinis similia; theca in pedunculo 
elongato, breviter oblonga, inclinata vel horizontalis, scaberrima, 4-carinata; calyptra indumento 
pallide fulvo appresso, thecam totam obtegens.—Viti (Milne !). 
Caulis 1}-3-uncialis. Folia viridia, sicca subnigra. Pedunculus j-l-uncialis. Habitus P. Teysmanni, 
Dory et Molk. similis, foliis autem latioribus.— Three or four barren stems of a Pogonatum were gathered in 
Tutuila by Mr. Powell, but, although appearing to come very near the species above described, the leaves 
are narrower and longer. 
Tab. 97, fig. 1. Stems of the natural size; fig. 2, a leaf, with transverse section, magnified. 
Trisus XII. BUXBAUMIÆ.—Peristomium duplex, externum imperfectum vel subobsoletum, 
internum e membrana conoidea indivisa apice truncata, plicis extus acutis. 
XXVI. Diphyscium, Mohr. Caulis humilis, interdum fere nullus. Folia ligulata, perichæ- 
tialia magna diversiformia. Theca magna, subovata, obliqua, ad operculum erectum ascendens. 
1. D. submarginatum, (sp. nov.) Mitt.; caulis brevis; fola patentia, spathulato-ligulata, 
margine cellulis minoribus incrassatis fuscescentioribus sublimbata subdenticulata, cellulis parvis 
rotundatis obscuriusculis areolata, perichætialia a basi anguste subulata, nervo excurrente sublævi, 
sensim attenuata.— Viti (Seemann !). 
Three plants only, adhering to the rootlets of a specimen of Thuidium ramentosum. 
B. HETERODICTYI.— Folia cellulis biformibus areolata. 
Tarsus XIII. SPHAGNE ж. Caules erecti, simplices vel furcati, ramis simplicibus adscendentibus 
vel recurvis in fasciculos confertis undique e caule egredientibus vestitus. Folia apice sepe 
dissilientia, angustissime limbata, cellulis amplis poris pertusis, sæpius fibro repletis, parietibus e 
