BRITISH HEPATICiE. 77 



(adds that careful observer) " yet define the limits of these species, and if I believe 

 myself for a time in order with the genus, new forms confuse me again. In ji purpu- 

 rascens the leaves are more closely imbricated, the lobes rounded and shortly denti- 

 culate, texture thinner and more pellucid, areolae larger', and the colour always some 

 shade of pink or purple." 



The ciliate leaves of ,5'. nemorosa should enable us to distinguish it from all British 

 species, with the exception of S. planifolia, and perhaps S. nimhosa, both of which are 

 rare alpine forms, having the lobes divided to the base, and the leaves of a chestnut- 

 brown colour. 



Whether our species is the Jung, netnorosa of Dillenius and Lmnmus it would 

 perhaps be impolitic to inquire too closely, since the name is now thoroughly esta- 

 blished. There needs a " statute of limitations " with respect to old names, as well as 

 other possessions. It is certainly more local, and of rarer occurrence than S. resupinata, 

 which, I suspect, is frequently confounded with it. 



Pii. Y. Fig. 15. — Scapania nemorosa. 1. Fertile shoot natural size. 2. The 

 same X 1 6. 3. Upper portion of fertile shoot (ventral aspect), showing colesule and 

 involucral bracts. 4. Portion of leaf more highly magnified. 5. Antheridium and 

 paraphyses (1). 



2. Scapania eesupinata, Dwmort. 



Pt. VIII. Fis. 26 (ex parte). 



Densely csespitose ; shoots slender, of uniform diameter, radi- 

 culose, zonate (ochraceous, olive-brown, or olive) ; leaves closely 

 - imbricated, equal, pellucid, smooth, divided for one-third of their 

 length into two lobes; inferior lobe roundish-obovate, obtuse or 

 apiculate, convex, strongly reflexed ; lobule half the size, obliquely 

 reniform, crossing the stem, apex rounded, concave, incumbent or 

 antiflexed ; margins equally dentate ; colesule obconic, truncate, 

 inciso-dentate ; capsule small, oval, shortly stipitate. 



Jungermannia resupinata, Lin. Sp. PI. 1599, fide syn. Dillenii (1753) ; Huds. 

 Fl. Ang. p. 512; With. Arr. Br. PI. 3, ed. iii. p. 875 (1796); Weber, Prodr. Hep. 

 p. 84 (1815); Ejg. Bot. t. 2437 {non Eook) ; Lindenb. Syn. Hep. p. 53 (1829); 

 Hiiben. Hep. Germ. p. 236 ; Ekart, Syn. Jung. p. 26, t. xi. f. 88 (excl. f. 3). 



Radula (Scap.) dentata, Dumort. Syll. Jung. p. 40 (1831). 



Scapania dentata, Dumort. Rev. Jung. p. 14 (1835); Cogn. Hep. Belg. p. 21. 



Scapania resupinata, Dumort. Bev. Jung. p. 14 ; et Hep. Eur. p. 34 (1874). 



Scapania undulata,, a. G. L. N. Syn. Hep. p. 65. 



S. cequiloha, var. foliis Icevibus, Oottsohe MSS. ; Jenson, in Bot. Tidsskr. ii. p. 288 

 . (1868) ; G. & R: Hep. Eur. Ex. nn. 92, 169, 225. 



Martinellia gracilis, Lindb. Manip. Muse. Secund. p. 365 (1874). 



Liehenastrum auriculatum, pin/nulis rotundis, crispum, Dill. Muse. p. 491, t. 71, 

 f. 19(1741). 



/J LAXIFOLIA ; Caule laxiori, foliis remotioribus, lobulo minus obtuso. 



/. resupinata fl. Lindenb. 1. c. p. 53 ; Dumort. Syll. p. 40 ; efc Hep. Eur. p. 34, 



y EECUBVIFOLIA I Foliorum lobis lobulisque recurvatis. 



Jung, nemorosa y recurvifolia, Hook. Jung. t. xxi. f. 8. 



Hab. — Shady rocks and walls in sub-alpine districts throughout the British isles. 

 Common on the Irish mountains, and often in fruit. Dr. Lindherg ! Equally frequent 



