FLORA VITIENSIS. 401 
losis areolata ; fructus lateralis; theca longe pedunculata; peristomium normale; calyptra magna, plicata, 
basi multifida. 1. P. velatum, Mitt. 1. c.—Samoa, Tutuila, on damp stones and decayed logs in woods and 
other shady places (10-50 feet) (Powell! п. 14). Found also in Borneo and Java (Motley !). 
XXIII. Hypnodendron, С. Müller. Caulis primarius repens, rhizomatiformis, ramos erectos 
inferne simplices superne in frondem decompositos producens. Folia in media fronde æqualia vel 
inæqualia et compressa. Theca inclinata horizontalisve, plicata, peristomio perfecto. 
A small genus of large and handsome species, conspicuous for their tree-like growth, of which the 
following have not yet been found in Viti, viz.:—1. H. rigidum, (sp. nov.), Mitt.; ramus erectus, inferne 
simplex, foliis appressis tenuiter acuminatis obtectus, demum denudatus, rigidus, superne in frondem sub- 
oblongam ramis simplicibus ramulosisve pluribus pinnatus; folia in frondis medio late subovata lanceolata, 
acuta, substriata, nervo percurrente dorso dentato, margine serrulata, cellulis angustissimis densis firmis 
areolata. — Aneitum (Milne !).—Fronds with the stipes four inches high. ` Foliage dull brownish-green. 
2. H. Samoanum, Mitt. Journ. of the Proceed. Linn. Soc. 1868, p. 192.—Samoa, Tutuila, on trees und rocks 
in the beds of gullies (100-2000 feet) (Powell! n. 107). 3. H. Milnei (sp. nov.), Mitt. ; stipes bi-triun- 
cialis, ruber, rigidus, erectus, apice in comam frondiformem subdeltoideam subhorizontalem divisum ; folia 
in stipite laxe imbricata, patentia, late ovata, acuminata, nervo excurrente, margine serrata, cellulis elongatis 
ad margines folii minoribus brevioribus, basalibus ad angulos majoribus fuscidulis, folia in ramis ovato-lanceo- 
lata nervo excurrente dorso dentato marginibus dentibus duplicatis serratis.— Aneitum (Milne !).—Near 
to H. divaricatum, but differing in the stipes not being covered with rootlets, the leaves of the branches 
shorter, more dense and rigid. In the same respects this species differs from the H. comosum, H. Sieberi, 
and Н. comatum of Australia, Tasmania, and New Zealand. 4. H.divaricatum, Hornsch. et Reinw. Nova 
Acta Acad. Cæs. Leop. 14. vol. ii. Suppl. t. 40.—Isle of Pines (Milne !). 
l. H. speciosissimum, Sull. Proceed. Amer. Acad. of Arts and Sc. 1854; Amer. Expl. Exped. 
t. 9 (Hypnum) ; rami stipite elongato rigido denudato, superne in frondem oblongam planam vel 
ramulis inferioribus nonnullis assurgentibus bipinnatam innovationibus e superiore latere frondis 
egredientibus proliferi; folia compressa erecto-patentia inferne ovato-lanceolata sensim longe 
subulato-acuminata rigida plana, nervo percurrente margine superne remote subserrulata, cellulis 
angustis elongatis densis firmis, folia ramea ramulinaque angustiora argute serrvlata, perichætialia 
erecta; theca in pedunculo breviusculo erecta, ovalis, operculo conico acuminato.— Viti (American 
Expedition). Also in the Malay Archipelago (Herb. Hooker!), and in the Philippine Islands (Cu- 
ming ! n. 2198). 
Stipes three inches long, the branched upper portion as long or longer. Foliage firm, unaltered in 
drying, not glossy, of a red-brown colour. 
2. H. Vitiense, (sp. nov.) Mitt.; folia compressa, ovato-lanceolata, acuta, planiuscula, splen- 
dentia, nervo dorso superne denticulato percurrente, marginibus denticulis duplicatis brevibus serratis, 
cellulis angustis elongatis finitimis prominulis.— Viti (Seemann, n. 842). 
H. Junghuhniano omnibus partibus primo aspectu simillimum, sed foliis breviter duplicate serrulatis et 
colore pallidiore. 
In the list of Vitian species published in ‘Bonplandia’ this species was mistaken for И. Junghuhnia- 
num, which it so much resembles. 
3. H. arborescens, Mitt. Journ. of the Proceed. Linn. Soc. 1859 (Trachyloma) ; rami erecti, 
inferne stipite foliis sparsis patulis, superne in frondem subovatam lanceolatamve pinnatim bipinna- 
timve ramosi ; folia e medio rami primarii compressa ovato-lanceolata acutissima, nervo excurrente, 
dorso dentieulato, margine denticulis duplicatis serrato, cellulis angustissimis subnodulosis, folia 
ramulina anguste lanceolata grossius serrata, perichætialia longiora erecta subulata subintegerrima ; 
theca in peduneulo elongato cylindracea, demum plicata inclinata subhorizontalisve, operculo recto 
sensim acuminato, peristomio dentibus intus valde trabeculatis interno processibus carinatis pertusis 
