392 FLORA VITIENSIS. 
Amer. Acad. of Arts and Sc. 1854; Island of Gau, Viti (Milne !). Also in Samoa (Græffe |) and 
Tutuila (Powell ! n. 69). 
Foliage obscure, glaucous green. In size, habit, and appearance, this species, which appears to extend 
through the Indian Archipelago to the Islands of Polynesia, but has not yet been observed in Australia 
or Tasmania, corresponds closely with the numerous species found on the eastern side of the Andes in 
S. America, in all which there is great uniformity on the foliage, which is generally very obtuse, of a dull 
obscure æruginous-green, and they form a natural group, which has been elsewhere called Callicostella. 
IX. Chætomitrium, Dozy et Molk. Caulis repens vel procumbens, pinnatim ramosus. Folia 
binervia, uniformia. 
Å genus of very elegant species, chiefly found in the Indian Archipelago, one other only is yet known 
to inhabit Ceylon, they approach very nearly to some forms of Lepidopilum, so abundant in tropical America, 
but differ in habit: in Chætomitrium the stems are procumbent and rooting, and the fruit arises from them 
or from the lower part of the principal branches ; in Lepidopilum the fruit arises from the upper part of free 
branches, and the teeth of the outer peristome have usually the external lamina very narrow in proportion 
to the internal. The following species have not yet been found in Viti:—1. С. speciosum, Sull. Amer. 
Expl. Exped. 1859, p. 23. t. 22 ( Holoblepharum).—Samoan Islands (Amer. Exped.). 2. O. Tuitense, Sull. 
Amer. Expl. Exped. 1859, p. 22. t. 23.—Society Islands, Mountains of Tahiti (Amer. Expl. Exped.) 8. C. de- 
pressum, Mitt. Journ. of the Proceed. Linn. Soc. 1868, p. 190.—Samoa, Tutuila, trees in low shady woods, 
very rare, only once found (Powell! п. 81). 4. О. frondosum, Mitt. Journ. of the Proceed. Linn. бос. 
1868, р. 189..—Samoan Islands, Tutuila, on trees by the ascent to Matafao, 1500-2000 ft. (Powell! n. 68). 
1. C. rugifolium, Sull. Amer. Expl. Exped. 1859, p. 23. t. 22 (Holoblepharum) ; dioicum ; 
caulis prostratus, ramis brevibus approximatis, pinnatus ; folia compressa, ovato-lanceolata, apicem 
versus excavata ibique pagina inferiore denticulata, marginibus inflexis constricta, breviter binervia, 
margine crebre serrulata, cellulis angustis noduliferis; folia perichzetialia imbricata, apicibus in cus- 
pidem creberrime denticulatum productis ; pedunculus longiusculus, ubique setulis hispidulus ; theca 
ovalis, inclinata, operculo rostrato; calyptra setulis villosa.— Viti, on trees (Amer. Exped.) ; Ovalau, 
in the mountains (Milne ! n. 864). Also in the Solomon Islands. 
X. Distichophyllum, Dozy et Molk. Musci Archip. Ind. p. 99.—Caulis erectus ascendens vel 
procumbens. Folia tenera, uninervia. 
The following are Polynesian species of this genus :—1. D. Freycineti, Schw. t. 279 (Hypnum).—Sand- 
wich Islands (Douglas !) ; Oahu (Beechey!). 2. D. paradoxum, Mont. Voy. de la Bonite, p. 296 ( Hookeria 
Pterygophyllum).—Oahu (Beechey !) ; Sandwich Islands (Gaudichaud!). 3. D. (Discophyllum, Mitt. Linn. 
Soc. Journ. vol. x.) flavescens, Mitt. Linn. Soc. Journ. vol. x. p. 191.—Samoa, Upolu, on trees (Powell, 93). 
ra 
1. D. Vitianum, Sull. Am. Expl. Exped. t. 24; caulis humilis, simplex vel inferne divisus ; 
folia compressa, media intermediaque parum minora oblongo-ligulata acuta, lateralia spathulata 
apiculata, nervo infra medium evanido, limbo angusto integerrimo flexuoso e seriebus cellularum 
duabus composito marginata, cellulis superioribus rotundo-hexagonis, inferioribus ovali-hexagonis ; 
theca in peduneulo brevi papilloso horizontalis; calyptra basi lacero-fimbriata, setulis inspersa.— 
Ovalau, trees in the mountains (Milne!) ; Samoan Islands (Powell! n. 94). 
Foliage pale glaucous-green, with iridescent cells. This species is allied to the Javan D. spathulatum, 
Dozy et Molk. 
TriBus VII. NECKEREÆ.—Fructus in ramis frondiformibus e caule oriundis immersus vel 
exsertus. 
The two following genera have not yet been met with in Viti:—I. CALYPTOTHECIUM, Mitt. Linn. Soc. 
Journ. vol. x. 1. C. prelongum, Mitt. Linn. Soc. Journ. vol. x. p. 190.— Society Islands, with fruit (Bid- 
will, Herb. Hooker) ; Samoa, Upolu, on trees, barren (Powell! n. 102). Tab. 97. Fig. 1, a stem of the 
natural size; 2, а leaf; 8, perichætium; 4, a portion of the peristome, all magnified. II. (EbroLaDivu, 
