IlepaticcB?\ 



FLORA OF NEW ZEALAND. 



149 



The above appears to be all that may be safely affirmed of this genus. It is readily recognized by its evenly 

 arranged leaves and stipules, which last so nearly resemble the leaves in size and form, that the foliage might almost 

 be called trifarious. The perfect capsule has been seen only in two species, in one of which it is spirally twisted and 

 in the other perfectly even and straight. This genus is distinguished from Jungermannia by its incubous leaves and 

 from Sendtnera, which it closely resembles in habit, by the form of its perianth and free calyptra. 



1. Isotachis Lyattii, Mitten; oaule erecto ramoso apicibus decurvis, foliis imbricatis subquadratis vel 

 semicordatis truncatis margine dorsali valde arcuato apicem versus denticulato ventrali rectiusculo incurvo 

 spinuloso-dentato apice quadrifido sinu medio profundiore laciniis marginibus recurvis dentatis incurvis, 

 amphigastriis inferne cauli adpressis superne patulis obovatis tri-quadrifidis dentieulatis basin versus dentibus 

 elongatis deflexis armatis, perianthio elongato subcylindrico minute tuberculato apice obtuso, foliis arnphi- 

 gastrioque involucralibus internis minutissimis extends majoribus marginibus dorsalibus magis dentatis. — 

 (Tab. C. Kg. 7.) 



Hab. Northern and Middle Islands : Port Preservation, Lyall. Top of Kuahine mountains, Colenso. 



Pallida, inferne fusca, superne purpureo-tincta. Caulis tripollicaris, basi decumbens, ramis parum ramosis. 

 Folia secunda, subopposita, dorso arete imbricata. PeriantMum tubulosum, elongatum, basi apiceque rotundatum, 

 carnosum, rigidum. Folia involucralia minuta, exteriora caulinis similia, sed duplo majora. 



A large and handsome species, remarkable for its dirty-white colour, and for the decurved apices of its stems, 

 which are tinged of a purplish or violet. It is closely allied to I. madida and to /. Gunniana (a Tasmanian species not 

 yet described) in the structure of its perianth, which, unlike any other Jungermannia, is composed of several layers of 

 cells ; this thickening- of its walls is not owing to the adhesion of the calyptra within, nor to leaves on the external 

 surface. The inner involueral leaves in all these species are very minute and liable to be overlooked. — Plate C. 

 Fig. 7 : — 1, a plant, natural size ; 3, a leaf; 3, portion of leaf with cells; 4, a stipule; 5, a perianth and involu- 

 eral leaves : — all magnified. 



2. Isotachis subtrifida, Mitten ; caule erecto subsimplici apice decurvo, foliis secundis ovatis condupli- 

 catis apice bi-trifidis dentibus margineque dorsali integerrimis ventrali vel integerrimo vel parce dentato, 

 amphigastriis conformibus aliquantulo minoribus. — Hook. fil. et Tayl. Lond. Journ. Bot. 1844, p. 579. 

 G. L. et N. Syn. Hep. p. 681. 



Hab. Northern Island : Bay of Islands, amongst Lopliocolea leucophylla, J. I). II. 



Pallide fusca, apicibus pallide roseis. Caulis pollicaris, gracilis. Folia laxe imbricata, erecto-patentia, sinubus 

 laciniisque acutiusculis, margine dorsali integerrimo, ventrali nonnunquam parce dentato et basi dente parvo auricu- 

 lari decurvo. 



A small and slender species, more nearly allied to one gathered in Peru by Professor Jameson than to any of 

 those yet described, and, so far as can be seen from the very rudimentary state of its involueral leaves, corresponding 

 in its involucrum and perianth. It has less the look of /. serrulata, Sw., than many of the allied species, from its 

 leaves being more erect. The New Zealand specimens strikingly resemble young stems of the tropical form of 

 Sendtnera juniperina (Sw.), Nees. 



Gen. XIII. GOTTSCHEA, Nees ah R 



1. Gottschea pmnatifolia, Nees. G. L. et N. Syn. Hep. p. 22 et 625. Flor. Antarct. p. 147. f. 63. 

 f. 1. G. ciliigera, Lond. Joum. Bot. t. 3. p. 147. Jungermannia pinnatifolia, Hook. Muse. Exot. t. 114. 



Hab. Northern and Middle Islands : Dusky Bay, Menzies. Tararua mountains, Colenso. Port 

 William, Lyall. 



Also found in Lord Auckland's Group. 



VOL. ii. o „ 



