FLORA VITIENSIS. 391 
Trisus V. RHACOPILEZÆ.—Folia inæqualia, biformia, omnia siccatione sursum involuta, 
pagina interiore ad caules latus superius spectante. 
The following genus has not yet been found in Viti:—I. PoWELLIA, Mitt. Linn. Soc. Journ. vol. x. p. 
187, P. involutifolia, Mitt. 1. c.—Samoan Islands, Tutuila, on a Cocoanut-tree a little inland; Fangasá Bay 
(1-2 feet) (Powell! n. 43). 
VII. Rhacopilum, Beauv. Prodr. p. 36. Caules prostrati, radicantes, parum vel subpinnatim 
ramosi. Folia diversiformia, in caulis latere superiore minora, stipuliformia. Fructus е caulis latere 
oriundus; theca in pedunculo trigono elongato cylindracea, suberecta horizontalisve, demum plicata, 
peristomio perfecto, calyptra dimidiata vel plurifida sæpe pilosa.—Musci terrestres v. in arborum 
truncis putridis degentes, cæspites latos depressos formantes, foliis intense viridibus siccitate incurvis. 
A genus well distinguished by the peculiarity of its leaves being of a different form on the upper side 
of the stems from those which are inserted on the lower side; these latter, too, have always their inner sur- 
face turned upwards, so that, at first sight, their insertion might be supposed to be distichous. All the 
species are very similar, but differ in size and some minute particulars. 
1. R. spectabile, Reinw. et Hsch. Bryol. Javan. t. 144 et 145; dioicum; folia majora late 
ovata acuta margine serrata nervo in mucronem excurrente, minora basi ovata lanceolata, omnia 
cellulis rotundis vel ovali-rotundatis areolata, perichætialia ovato-lanceolata subulato-attenuata in- 
tegerrima ; theca longe pedunculata, elongata, horizontalis, demum deflexa, basi substrumosa.—Viti 
(Seemann !). Also Samoa and Tutuila (Powell! n. 65). 
These specimens differ a little from the common state of the species found in Java in having the areola- 
tion rather more lax, but in size and appearance they correspond closely. 
2. R. cuspidigerum, Schw. in Freycinet, Voyage, 1826, p. 227; dioicum?; folia majora ovata 
obtusiuseula margine subintegerrima plus minus incurva convolutacea, minora ovato-lanceolata, 
omnia nervo in mucronem excurrente cellulis parvis densis rotundis obscuris areolata.—R. convolu- 
tum, C. Mueller, Syn. ii. р. 13?—Viti (Milne!). Also in Sandwich Islands (Gaudichaud), Samoa 
and Tutuila (Powell! n. 39), Norfolk Island (Thompson !), Isle of Pines (Strange ! M'Gillivray !). 
The original specimens gathered by Gaudichaud are rather smaller and more compact than those from 
the other localities, but there does not appear to be any definite character whereby they may be distin- 
guished from the states so frequently included in collections from Australia, Tasmania, and New Zealand. 
The leaves are entire or irregularly crenulate. 
Tarsus VI. HOOKERIEZE.— Folia inæqualia, seriebus utrinque 2 lateralibus longioribus sæpe verti- 
caliter planis, seriebus reliquis minoribus appressis, rarius æqualia. Calyptra mitriformis. 
The following genus has not yet been found in Viti, viz. :—PILOTRICHUM: 1, P. rugifolium, C. Mueller, 
Syn. ii. p. 177.—Hawaii (Menzies, in Herb. Hooker, where also is another specimen from Dickson without 
locality). 
VIII. Hookeria, Sm. Caulis procumbens, vage vel pinnatim ramosus. Folia binervia vel 
enervia, diversiformia. 
1. H. papillata, Mont. Ann. des Sc. Nat. 1845, p. 93 (Hookeria); synoica; caules procum- 
bentes, subpinnatim ramosi; folia compressa, superiora media oblonga, intermedia ovata, lateralia 
ovato-ligulata, omnia apice obtusa breviter apieulata angulatave, margine apicem versus crenulata, 
nervis fere ad apicem continuis dorso superne serrulatis, cellulis parvis rotundis, papilla inconspicua 
medio imposita ; folia in seriebus inferioribus acutiora, pellucidiora, cellulis suboblongis ; perichzetialia 
erecta, inferne ovata, inde ligulata acuta, interna ovata latiora; theca in pedunculo elongato levi 
ovalis, horizontalis, collo sensim angustato ; calyptra scabra.—H. oblongifolia, Sull. Proceed. of the 
ЗЕ 2 
