400 FLORA VITIENSIS. 
frequently seeund, the leaves on the upper side of the stem larger than on the under, and usually of a dif- 
ferent form. The areolation is either (as in Sp. 1-6) with elongate, narrow, close-placed cells, or in some 
species (7-8) very lax and pellucid. 1, Е. pacificum, Mitt. Journ. of the Proceed. Linn. Soc. 1868, p. 
180, from Samoa, without fruit (Powell!), Tobie Island, also in Eromanga (Bennett ! Herb. Hooker); 2, 
E. sodale, Sull. Amer. Expl. Exped. t. 12. f. B (Hypnum) (Hypnum molluscoides, Sull. Proceed. Amer. 
Acad. of Arts and Ne. 1853, е notula ejusd. in Amer. Expl. Exped. p. 15), from Society Islands (Eimeo ! Ame- 
rican Expedition), Tahiti (Beechey!), South Sea Islands (Nightingale!), Samoa, Tutuila (Powell!) ; 3, Е. Sand- 
wichense, Hook. et Arn. Botany of Beechey Voy. p. 109 (Hypnum), from Oahu, Sandwich Islands (Lay et 
Collie! Beechey !), Sunday Island (Milne !), Samoa, Tatuila (Powell!) ; 4, E. arcuatum, Sull. Proceed. Amer. 
Acad. of Arts and Se. 1854, from Sandwich Islands, East Maui (American Expedition); 5, Е. gracili- 
setum, Hornsch. et Reinw. Schw. t. 220, from Hawaii, District of Puna (American Expedition) ; 6, Е. fusces- 
cens, Hook. et Arnott in Beechey Voy. t. 19 (Hypnum), from Tahiti (Beechey !), Samoa, Tutuila, on 
stones and rocks in gullies and streams where the flow of water is frequent (Powell! n. 20); 7, E. in- 
Jłectens, Brid. vol. ii. p. 331, from Tahiti (Dumont et D'Urville), Samoa, Tutuila (Powell ?). 
1. E. Tutuilum, Sull. Amer. Expl. Exped. t. 10. f. A (Hypnum) ; dioicum?; caules prostrati, 
pinnati ; folia compressa subsecunda media sublanceolata planiuscula lateralia inæquilatera curvata 
subcomplicata omnia nervis brevissimis, margine e medio ad apicem usque crebre serrulata, cellulis 
angustis, perichætialia basi late ovalia erecta inde in subulam angustam serrulatam patulam producta ; 
theca in pedunculo elongato breviter ovalis, demum pendula, operculo conico acuminato.—Viti 
(Milne!). Also in Samoa, Tutuila (American Expedition, Poweli !). 
Stems two or three inches long, with branches two to three lines in length. Foliage almost shining, 
greenish, becoming straw-coloured and brownish. 
Trisus X. HYPNEZE.— Fructus in ramulo brevissimo sepius longe pedunculatus. Folia 
uninervia. 
The following members of this tribe have not yet been found in Viti, viz.:—I. Hyrxum, L. Caulis 
procumbens repensve, ramis pinnatim dispositis vel ascendentibus in cæspitem congestis, interdum ascen- 
dens suberectus subarbusculosus. Folia undique æqualia, cellulis elongatis areolata. Theca erecta 
inclinata horizontalisve, æqualis vel gibba.—A very extensive genus of Mosses, divisible into some sec- 
tions, which are more easily seen than exactly capable of definition. Nearly all the Polynesian specimens 
belong to the group named by Schimper Rhynchostegium, the capsules having a long beaked operculum. 
1. H. compressifolium (sp. nov.), Mitt.; synoicum; caulis decumbens, ramis irrregularibus subpinna- 
tim divisus ; folia compressa ovato-ovalia acuminata planiuscula, nervo ultra medium producto, margine 
serrulata, cellulis angustis elongatis, ramea ulteriora ovalia acuta distinctius serrulata, perichætialia subulata 
attenuata; pedunculus elongatus, ubique tenuissime scabrosus; theca ovalis, inæqualis, horizontalis, oper- 
culo subulirostrato.— Sunday Island (Milne ! n. 91), Raoul Island, Kermandee Islands (M'Gillivray !) — This 
species, in size and appearance, nearly resembles the Hypnum tenuifolium, Hedw., so frequent in Australia, 
Tasmania, and New Zealand, and it is allied to Н. austrinum, H. f. et W., but differs in habit in the more 
strongly-nerved and more compressed foliage. In these particulars it differs also from the New Zealand 
Н. asperipes, Mitt., which has more cordate not compressed leaves. Fragments of a different species were 
collected in Samoa by Powell. 2. H. Wilkesianum, Sull. Proceed. of the Amer. Acad. of Arts and Sc. 
1854.—Hawaii (American Expedition). II. Sctaromium, Mitt. Caulis primarius repens, ramos arbus- 
culosos vel vage elongatos producens. Folia æqualia, cellulis parvis brevibus obscuris densis. Theca in- 
clinata horizontalisve.—A group of species mostly of large size, with rigid stems and firm foliage, which is 
of a dull, obscure green colour. In some particulars this genus approaches some species of Porotrichum 
or Thamnium. 1. S. glauco-viride, Mitt.; rami inferne stipitati, superne ramulis sparsis pinnatim ramosi, 
elongati; folia patentia firma setacea a basi subovato-lanceolata biplicata sensim longe angustata, nervo 
pereurrenté usque ad apicem a pagina folii planiuseula distincto, cellulis minutis obscuris rotundis, peri- 
chætialia basi ovalia tenera inde longe subulata patula ; pedunculus elongatus, ruber ; theca oblonga, horizon- 
talis, opereulo subulato.— Sunday Island, trees on the summit of the mountains frequent (Milne! n. 94), 
Norfolk Island.— Dull glaucous-green. Closely resembling the Hypnum hispidum figured in Plate LXI. 
f. 2, of the ‘Flora Antarctica,’ but a little more slender, and the points of the foliage more narrow. 
2. S. tricostatum, Sull. Proceed. Amer. Acad. of Arts and Se. vol. iii. CNeckera), Amer. Expl. Exped., 
cum icone.—Hawaii, forest at the eastern base of Manua Kea (Amer. Exped.), Oahu and Hawaii ad Mont. 
Kaah (Macrae! in Herb. Mus. Brit.). ІП. PrrEkruw, Mitt. Journ. of the Proceed. Linn. Soc. 1868, р. 
176; caulis procumbens, bipinnatim ramosus, phyllodiis vestitus; folia uninervia, cellulis rotundatis papil- 
