Ilepaticce?^ 



FLORA OF NEW ZEALAND. 



143 



XCIX. Fig. 3 : — 1, a plant, natural size ; 2, a portion of the stem with leaves and stipule ; 3, a portion of leaf 

 with cells : — both ; 



Gen. VI. PSILOCLADA, Mitten. 



Perianthium in ramulo brevissimo laterale, subcylindricum, Iseve, ore laciniato-dentato. Involucri folia 

 magna. — Folia succuba, minuta, quadridentata. Amphigastria foliis conformia. Caulis ramulis altemis 

 subpinnatim ramosns, procumbens. 



1. Psiloclada clandestina, Mitten. — Jungermannia clandestina, Wils. in Herb. Mitten. (Tab. 

 XCIX. Pig. 4.) 



Hab. Northern Island: amongst Mosses, Wellington, Stephenson; a single stem. 



Cauks exilis, pollicaris, procumbens vel adscendens, subpinnatim ramosus. Folia explanata, minuta, remota, sub- 

 quadrata, ad medium quadrifida, segmentis aculeiformibus basi extus eellulis tumidis tuberculatis? a basi patula, 

 abrupte mflexis, rigidula, e eellulis grossis interstitiis crassiuseulis areolata, segmenta foliorum eellulis nullis. Am- 

 phigastria paullo minora, fere conformia. Folia involucralia majora et teneriora, secunda, profunda bifida, laciniis 

 falcatis subulato-attenuatis dentatis. Perianthium subcylindricum, lseve, laciniis subulato-attenuatis secundis. 



The habit of this plant is so unlike that of any described genus with succubous leaves, that I have been obliged 

 to consider it as the type of a new one, bearing somewhat the same relation to Chiloscyphus, that Lepidozia does to 

 Mastigobryum. In general appearance, this minute species resembles Lepidozia capillaris, Sw., but from its shorter 

 and inflexed leaves, looks smaller, and might easily be passed over as an imperfect state of that or an allied species. 

 It differs from Lepidozia in the absence of flagella, in its succubous leaves, and in the very much increased size of 

 those of the involucrum. Some latitude must be allowed for the above description, which is drawn up from a few 

 fragments picked out of Tasmanian Mosses by Mr. Wilson, a single New Zealand specimen, and one entire empty 

 perianth.— Plate XCIX. Fig. 4 :— 1, a plant, natural size; 2, a portion of the stem with leaves; 3, a leaf; 4, a 

 stipule detached from the stem ; 5, a perianth with involucral leaves and a portion of the stem -.—all magnified. 



Gen. VII. GYMNANTHE, Tayl. 



1. Gymnanthe saecata, Taylor, Flor. Antarct. p. 153. G. L. et N. Syn. Hep. p. 193 et 712. Jun- 

 germannia saccata, Hook. Muse. Bxot. t.\%. 



Hab. Throughout the Islands : Dusky Bay, Menzies. Bay of Islands, J.B.II. Poverty Bay, Lake 

 Taupo, etc., Colenso. Chalky Bay and Southern Island, Lyatt. 



An Auckland Island species. — The name proposed for this genus is scarcely expressive of the remarkable struc- 

 ture of its fructification. The archegonia appear to be produced on the dorsal side of the apex of the stem, and the 

 torus is formed by the downward expansion of the ventral side. In 67. saccata the unfertilized archegonia are themselves 

 drawn into the mouth of the torus, and at maturity remain enclosed there, in appearance at the summit of the 

 calyptra, which is everywhere connate with the torus itself. The leaves on the dorsal side and at the apex remain, 

 at the completion of the growth of the torus, in the same position as before. The chief peculiarity of these plants 

 is the apparent dorsal formation of the archegonia, which, when fertilized, sink through the stem to form the 

 perianths. In the smaller species with entire leaves, this structure gradually becomes less apparent, and in 67. lutescens 

 [Oymnomilrium, Gottsehe, Syn. Hep. p. 4] there is scarcely any formation of torus, but the fruit rises from the 

 dorsal side and incrassated apex of the stem, surrounded by the upper leaves, concrete more or less with the calyptra. 

 The same structure is observable in 67. Wilsoni. The absence of stipules ascribed to the genus by Dr. Taylor, is 

 invalidated as a generic character by 67. lutescens and some other species to be mentioned hereafter. 



2. Gymnanthe tenella, Hook. fil. et Tayl., Lond. Journ. Bot. 1844, p. 377. G. B. et N. Syn. Hep. p. 

 192 et 712. 



