330 HEPATIC^. 



that in the Herbarium of Nees, are found specimens of both forms 

 and of paroicous species, along with Jiiuf/. alpcstris under the 

 name of Jn/tf/. j-'o^'P^^JP^oleuca. 



A peculiar type of this species has been collected by the late 

 John Whitehead near Woodhead, Cheshire, which is chiefly 

 remarkable for the extremely large number of pistillidia; I have 

 counted 37, 54 and 57 in three involucres, in this character 

 approaching Jtfn(/. Mildei, G., with which it has other characters 

 somewhat in common — bracts broadly ovate, unequally trifid or 

 quadrifid and perianth plicate. Jun(/. Mildei, G., differs, however, 

 from it, in its yellowish-brown colour not a bluish-green, with 

 the extremities of the leaves tinged violet, the leaves almost 

 vertically inserted and densely imbricated, not semi-vertically and 

 loosely imbricated ; the lobes of the leaves of the young branches 

 are almost equal, not very unequal, and the cells smaller, with 

 large trigones. It has much the habit ol Jung, ccqjitafa, Hook., 

 in its crowded upper leaves, but is dioicous. It affords a striking 

 example of a transition fiom one species to another. 



To distinguish /. ventricosa from allied dioicous ones is easy. 

 Jim^. incisa has a lighter green colour, leaves almost transversely 

 inserted, upper leaves irregularly toothed. Juu^. bantriensis and 

 its variety Muelleri, have stipules and different bracts and shaped 

 perianth. From Jmi^. aljjestris, see notes under that species. 



Description of Plate CXL. — Fig. 1. Plants natural size. 

 2. Fertile plant x 16 (Tunbridge Wells, Dr. Spruce). 3. Male 

 stem X 16 (C. & P. n. 171). 4. Leaf x 24 (Llanberis, W.H.P.). 

 5. Ditto (Cwm Bychan, E. M. Holmes). 6. Ditto (C. & P. n. 

 171). 7. Ditto (C. & P. n. 185). 8. Portion of leaf x 290 

 (Sussex, Gr. Davies). 9, 10. Bracts x 24 (Hastings, Bloomheld). 

 11. Bract X 16 (Isle of Man, Holt). 12. Young bract x 24 

 (G. & R. n. 185). 13. Bracteole x 85 (G. & R. 185). 14. 

 Pistillidium x 85 (ditto). 15. Perianth x 24 (Hastings, 

 Bloomfield). 16. Spores and elater x 290 (Sussex, G. Davies). 

 17. Perigonial bract x 24 (C. & P. n. 171). 18. Antheridium 

 X 85 (ditto). 19. Gemmae x 290 (Bingley, West). 



Description of Plate CXLI. — Juugermania ventricosa, var. 



