FLORA VITIENSIS. 419 
Одро CX. MARCHANTIEÆ. 
(AucToRE W. MITTEN.) 
The following are non-Vitian genera, viz. :— 
І. DUMORTIERA, Reinw. Blume et Nees; Gottsche, Lindenb. et Nees Syn. Hepat. p. 542. 
1. D. trichocephala, Nees; Hook. Icon. pl. 2. t. 159.—Sandwich Islands (Douglas, n. 71, Hillebrand, 
n. 4), Samoa (Powell, n. 150). 
II. Dexproceros, Nees ab Е.; Gottsche, Lindenb. et Nees Syn. Hepat. p. 570. 
1. D. granulatus (sp. nov.), Mitt.; frons subpinnatim ramosa, costa crassa opaca, limbo marginali 
lato margine dentato valde flexuoso erispatoque e cellulis subpellucidis areolato ; involuerum elongatum, 
tuberculosum ; capsula elongata, asperula.— Samoa (Powell, n. 144).—Frondes unciam longi, sesquilineam 
lati, rubiginosi.—1n this species the thin border of the frond is so much sinuated and crisped that the nerve 
appears as if beset with lobe-like leaves. 2. D. tumidulus (sp. nov.), Mitt.; frons furcatim ramosa, costa 
crassiore obscuriore e cellulis elongatis laxis areolata, limbo plicato tumido sinuato margine subdentato 
cellulis granuloso-obseuris rotundis areolato; involucrum elongatum, leve, capsula punctulata—Samoa 
ad muscos repens (Powell).—Frondes Sineam late, virides; involucra bilinearia ; capsula æquilonga.—This 
has the lamina bordering the fronds very little sinuated and the central costa far more soft and insensibly 
passing into the margin. 
ПІ. Ахтноскков, Micheli; Gottsche, Lindenb. et Nees Syn. Hepat. р. 582. 
1. A. flagellaris (sp. nov.), Mitt. ; frons sinuata, lobata, planiuscula, ecostata, levis, margine ramis ascen- 
dentibus elongatis angustis furcatis compressis obscurius areolatis ramosa ; involucrum læve, capsula elon- 
gata exserta, valvis divisis flexuosis.— Samoa, on decayed bark (Powell).— А. levi Europe similis, sed pro- 
longationibus 4-6 lineas longis singularis.—The curious branches which arise from the edges of the fronds 
much resemble in appearance some forms of Pellia. Two very different-looking specimens of species of 
Piagiochasma have been received from the Pacific, but too incomplete to afford any safe distinctive 
characters. в 
I. Marchantia, Linn. Receptaculum fæmineum masculumque ех apice frondis productum, 
margine radiatum. Involucra feminea radiis alterna. Perianthia 4-5-fida. Gemme іп scyphis e 
.dorso frondis enatis impositæ. 
1. M. nitida, Lehm. et Lindenb.; Gottsche, Lindenb. et Nees Syn. Hepat. p. 532; frondes 
elongatæ, planiusculæ, læves, poris parvis notatæ, subtus purpureæ, squamis parvis nervo contiguis ; re- 
ceptaculum femineum in pedunculo ramentoso hemisphæricum, subintegrum, margine brevissime 
lobatum, subtus ramentis dense obsitum ; receptaculum masculum lobatum.— Viti Levu (Greffe), 
. Samoa, Manua (1400 ft.), (Powell, n. 147), Tahiti (Collie), Hawaii (Macrae), Sandwich Islands 
(Hillebrand). 
The specimens of this Marchantia are none of them sufficient for an exact determination, but they 
appear to be the same as the species found in New Zealand as well as in India. 
Окро СХТ. LICHENES. 
(Асстовк J. M. CRoMBIE.) 
There can be little doubt that Viti, if not particularly rich in Lichens, must yet afford a fair 
roportion of subtropical species. It is, however, to be regretted that the few botanical collectors who 
Los visited it have here, as in other similar regions, paid 80 little attention to this interesting class of 
cryptogams. А few of the larger corticole sit chiefly Stictas, alone appear in herbaria, while terricole 
and saxicole species are entirely neglected. Dr. Nylander's Synopsis of the Lichens of the neighbouring 
Island of New Caledonia, amounting to 220 species (exclusive of varieties), will serve to give some idea of 
those which may be expected to occur also in Viti, and to show that a rich harvest awaits the researches of 
future collectors throughout the extensive Polynesian group. 
