Moore — On Irish Hepaticx. 667 



geria. In Gottsche and Eabenhor. Hep. Eur. exsic, n. 274, 

 Metzgeria furcata, var. /?. nuda, affords a good example of this 

 plant. The paucity of hairs, and more horny substance of the 

 stems, distinguish it from any of the normal states of M. furcata ; 

 but the chief distinguishing character seems to be the autoecious 

 inflorescence, which, as Lindberg observes, is remarkable in a 

 genus where all the other species of it are dioecious."' 



EiccAKDiA, Bennett, Gray.f 



Jungermannia, L. Fl. Suec. 1 ed., p. 399, n. 929 (1745), et Sp. PL, 

 1 ed., 2, p. 1136, n. 24 et 25 (1741); Hook. Brit. Jung. (1816). 

 Eoemeria, Eaddi, in Att. Soc. Modena, 18, p. 46 (1818). Eiccardia, 

 B. Gr. in Gray's j^Tat. Arr. Brit. PI. 1, p. 683, n. 9, excl. sp. n. 3 

 (1821); Carruth. in Seem. Journ. Bot. 3, p. 302 (1865). 

 Aneura, Dum. Comm. Bot. p. 115 (1823); Syll. Jung. Eur., 

 p. 85 (1831). Metzgeria, Corda, in Opiz, Beitr., 1, p. 654, n. 12 

 (1829). 



Erond fleshy, pinnatifid or sinuate, partially nerved or without 

 nerve. Fruit rising from the margin of the frond, under- 

 neath. Involucre short, cupuliform. Colesule wanting. Calyptra 

 exserted, smooth, fleshy. Capsule quadrivalved. Elaters with a 

 broad single spire, attached to the tips of the valves of the cap- 

 sule. Antheridia in marginal receptacles. 



1. Riccardia muUifida (Dill., Linn.), Gr. Autoecious. Erond linear, 

 multifid, nerveless, fleshy. Emit marginal. Calyptra exserted, 

 tuberculated. 



Jungermannia multifida, Linn. Sp. PL p. 1602; Engl. Bot. t. 186; 

 Hook. Brit. Junger. t. 45, excl. var. [i. ; Lindenb. Synop. Hepat., 

 p. 98; Aueura multifida, Dumort. Comm. Bot., p. 115; Syll. 

 Jung., p. 85 ; Hepat. Europ., p. 141 ; Nees, Europ. Leberm., 3, 

 p. 449 ; G. L. et IST. Synop. Hepat., p. 496 ; De ISTotaris, Prim. 

 Hepat. ItaL, p. 46 ; Eabenhor. Hepat. Europ. exsic. n. 463. 



Hab. On wet spots, where water has stood during winter, and among 

 wet grass and heaths. Yery common in Ireland. Yarieties of 

 this variable plant are of frequent occurrence. Yariety pinnati- 

 fida, Dumort. Syll. Jung. = Aneura pinnatifida, Dumort. Eev, 

 Jung. p. 26 ; Hepat. Europ., p. 142 (J. sinuata, Dicks. [?]), are 

 found at Killarney ; Galtymore, Tipperary ; and at Luggielaw : 

 var. submersa, on wet bogs near MuUingar, Westmeath. This 



* Although this genus and the follo-\ving are placed by Lindberg in divisions, 

 according to the principles and characters wliich mark the respective sections 

 of his arrangement, they are thereby placed among plants they have otherwise little 

 relationship with. I have, therefore, inserted them among those of a more con- 

 genial nature, where they have been long and naturally placed. In doing so, I 

 have at the same time indicated the position given them by Dr. Lindberg. 



t By Lindberg, as a sub-tribe in the sub-section f, Opisthogamac. 



