130 



FLOBA OF NEW ZEALAND. 



\HepaticcB. 



Laxe csespitosus, viridis et nigrescens. Caulk 1-3-pollicaris, ramis flexuosis. Folia fere verticals, immargi- 

 nata ; amphigastria cauli adpressa. Folia involueralia caulinis similia, erecto-patentia, ampMgastrio mvolucrah nullo. 



A species with more the habit and appearance of J. scalaru, than of any other yet described ; bnt it is a larger 

 plant, and the leaves are more translucent, and the perianth is perfectly free from the involueral leaves. The peri- 

 anth of some of the species of this group closely resembles that of Frullania and Lejeuma, the mouth being con- 

 tracted into a small short tube, and being, for the most part, about five-plicate above, but this form seems to shade 

 gradually off into that found in the species of other groups. The perianths of J. sealaris and J. eompressa, though 

 so different in appearance, only differ from those of/, nana and its allies, in being overlaid and combined with 

 several of the upper pairs of leaves, each pair being also combined for a considerable portion of its length with the 

 back of the pair above it, so that the perianth appears to be sunk into the stem; this structure is not of generic 

 importance, for it is found in Sendtnera, Polyotus, Oottscnea, and Lejeuma. In this group of Jungermannia there 

 exists a series from J. eompressa with a perianth almost completely overlaid, /. scalaris with it about one-third free, 

 J. stillieidiorum, Eaddi {SouMya tophaeea, Spruce, in Ann. and Mag. Hist. s. 2. vol. 3. pi. Hi.], with its perianth half 

 free, J. obovata has its perianth still more so, and in J. hyalina one leaf only is usually combined with the perianth : 

 Aulicularia is therefore only a modification of Jungermannia, chiefly remarkable for its overlaid or turbinate, tubular- 

 mouthed perianths, and for the disappearance of its stipules in the formation of the involucrum, in place of their 

 receiving, as is more usual, increased development. /. rotata was found in Lord Auckland's Islands, intermixed 

 with Plagiochila fuscella, with which it appears to have been confounded by Dr. Taylor.— Plate XCIV. Fig. 4 :— 

 1, plants, natural size; 2, a portion of the stem with leaves ; 3, a leaf detached ; 4, a perianth with capsule and in- 

 volucral leaves ; 5, a stipule : — all magnified. 



Gen. II. PLAGIOCHILA, Fees et Mont. 



1. Plagiochila conjugata, Hook. Muse. Exot. t. 91. G. L. et N. Syn. Hep. p. 52. 

 Hab. Middle Island : Dusky Bay, Menzies. 



2. Plagiochila comiexa, Hook. fil. et Tayl.; "caule implexo adscendente incurvo subramoso apice in- 

 crassato demum prolifero, foliis imbricatis oppositis verticalibus adpressis late orbiculatis connatis mferio- 

 ribus integerrimis superioribus subdenticulatis, perigoniis terminalibus oblongis spicatis."— Tayl. m Lord. 

 Journ. Sot. 1845, j?. 79, et 1846, j?. 266. G. L. et N. Syn. Hep. p. 648. 



Hab. Northern Island : Bay of Islands, A. Cunningham. 



"Tufts loose, yellowish-olive. Stems scarcely one inch high; shoots simple; leaves in a rapidly increasing 

 series, nodding or incurved at the top; margins of the leaves subreflexed at their summits, slightly joined at their 

 bases. Perigonial shoots nearly equalling the barren in breadth.— This can be confounded only with P. Brauniana, 

 Ldbg. ; but the leaves are more closely imbricated, the shoots wider, and the perigonia more considerable."— There 

 are no specimens of this species in Hook. Herb. 



3. Plagiochila prolifera, Mitten; caule repente, ramis erectis prolifero-ramosis, foliis fere verticalibus 

 erecto-patulis oppositis coadunatis rotundatis dentatis, perianthio obovato compresso ore dentate, spicis 

 masculis fasciculatis fiagelliformi-attenuatis. (Tab. XCIV. Pig. 5.) 



Hab. Northern Island : Bay of Islands ; amongst Sendtnera attenuala (Mitten), J. D. H. 



Caules bi-tripollicares. Folia remotiuscula, basi utrinque coadunata, marginibus dorsalibus integerrimis, basi 

 m caulem laaviter decurrentibus, cellulis minutissimis. PeriantJdum ore rotundato; foliis involucralibus spinuloso- 

 dentatis. — Planta mascula parum gracilior, spicis plurimis. 



Very closely resembling P. opposita, Nees (P. zygophylla, Tayl.), in size and habit, but evidently distinct in 

 the decurrent combined dorsal bases of its leaves, and in the cells being about half the size. The involueral leaves 

 and mouth of the perianth are also much less strongly toothed. P. Brauniana, Ldbg., has differently-formed leaves, 

 perianth, and areolation. -Plate XCIV. Fig. 6 :-l, plants, natural size- 2, a portion of the stem with a pair of 

 leaves; 3, a perigonial leaf enclosing an antheridium ; 4, perianth and involueral leaf:— all magnified. 



