408 "FLORA VITIENSIS. 
mascule elongate interdum ramosæ, foliis perigonialibus brevibus concavis integerrimis.—Samoa (Powell! 
n. 58).—Rami 1-4 uncias alti, latitudine cum foliis bilineares. Folia luteo-viridia vel olivacea. Spice 
masculæ 2—12 unciam longs, curvate. 5. P. auriculata (sp. nov.), Mitt. ; rami elongati, simplices vel fasci- 
eulatim diehotomi ; folia explanata, a basi latiora, semicordata, angustata, ligulata, obtusa, margine ubique 
dentibus elongatis angustis ciliata, angulo ventrali in auriculam inflatam revoluto, involueralia magis ciliata. 
— Samoa (Powell! n. 6).—Rami 1-2-unciales, latitudine cum foliis bilineares Folia mollia, olivaceo-viridia. 
6. P. combinata (sp. nov.), Mitt.; caulis innovatione singula infra perianthium orta iterum iterumque 
continuatus ; folia opposita, remotiuscula, patula, oblongo-elliptica, apice bidentata, margine dorsali præcipue 
apicem versus paucidentata, basi antice posticeque anguste combinata; folia involueralia margine dorsali 
ventralique magis dentata, perianthio late obovato, ala parva antica dentata, labiis grosse dentatis.—Sand- 
wich Islands (Hillebrand ! n. 29).— Caulis subuncialis, gracilis. Folia lineam longa, fulvo-viridia.—In the 
form of its leaves, this curious species resembles P. crea, Tayl, and is remote from any other with conju- 
gate leaves. 7. P. oblongiflora; rami graciles, parce dichotome divisi; folia remota, late ovata, obtusa, 
margine ventrali apiceque breviter dentata, dorsali integerrima, involueralia conformia; perianthium elon- 
gatum, oblongum, apice truncatum dentatum, ala nulla, spice masculæ sepe interrupte foliis perigonialibus 
obtusis vel acutis.—Samoa (Powell! n. 51).—Rami 1-2-uneiales, cum foliis sesquilinea lati. Folia firma, 
obscure fusca. 8. P. Owaihensis, Nees ab E. et Lindenb., Lindenb. Sp. Hepat. fasc. 1. t. 5.— Hawaii 
(Menzies |). 
1. P. arbuscula, Brid. (Jungermannia), Lindenb. Sp. Hepat. f. 1. t. 4; rami elongati, superne 
dichotomi, flabelliforme divisi; folia explanata, patentia, dimidiata, ovata, apice oblique truncata, 
dentibus duobus validioribus, margine ventrali paucidentata, dorsali recurvo integerrimo, involu- 
cralia magis dentata ; perianthium ovato-oblongum, ore parvo, labiis rotundatis denticulatis ; perigonia 
in ramis elongatis interrupta, foliis apice subtridentatis.—Also in Viti (Seemann! inter n. 862; 
Milne !), Samoa (Powell!), Upolu (Greeffe !). 
Rami in speciminibus Vitiensibus triunciales, latitudine cum foliis 1-14-lineares. Folia nigro-fusca. 
2. P. Vitiensis, Mitt. Bonplandia, 1861, p. 367; rami superne dichotomi; folia explanata, - 
patentia, oblongo-ligulata, apice obtusa, in superiora oblique truncata, margine dorsali recurva, 
integerrima, ventrali parum curvata, apicem versus apiceque dentata, involucralia latiora, apice mar- 
gineque ventrali spinoso-ciliata ; perianthium obovatum, ala nulla, ore labiis subtruncatis dentato- 
ciliatis.—P. patentissima, ex parte, Gottsche, Lindenb. et Nees Syn. Hep. 36.— Viti (Seemann! 
n. 862). Also in Hawaii (Menzies ! in Herb. Hooker). 
Rami biunciales, cum foliis latitudine vix bilineares. Folia viridia. 
3. P. Seemanni, Mitt. * Bonplandia, 1861, р. 367; rami elongati, simplices ; folia explanata, 
divaricata, semicordato-ovata, obtusa, in partibus superioribus ramorum attenuatis magis rotundata, 
margine toto ambitu breviter spinoso dentata, ventrali basi reflexa, dorsali recurva, basi subsinuata, 
e cellulis parvis rotundis interstitiis grossis areolata.—Viti (Seemann ! n. 864). 
Rami 2-5 uncias alti, latitudine cum foliis 4-lineares. Folia olivaceo-viridia.— P. superbe, Nees ab E., 
insulæ Mauritii simillima, sed foliis obtusis margine ubique dentatis. 
4. P. geminifolia, (sp. nov.) Mitt. ; rami егесі, geniculati, proliferi, ramulis flagelliformi- 
attenuatis descendentibus; folia verticalia opposita, basi connexa, patentia, late obovata, apice 
rotundata, dentibus latis brevibus serrata, margine dorsali ventralique integerrima, involucralia 
dentibus majoribus lanceolatis denticulata; perianthium obovatum, compressum, labiis dentibus 
pluribus elongatis, ciliatum ; folia perigonialia imbricata, saccata, apice tridentata.— Viti (Seemann !). 
Also in Samoa (Powell! n. 50). 
Caules fertiles innovationibus uncialibus iterum iterumque proliferi, interdum 3-4 uncias alti, masculi 
unciales, apice attenuati arcuati descendentesque. 
So similar is this to P. opposita, Nees, found in Java and Ceylon, that until the perianths were 
detected it was supposed to be a state of that species, but it differs in the following particulars :—The 
cauline leaves are not rotund, but obovate or subeuneate; those embracing the perianth are strongly 
