﻿412 Evans: Hepaticae of Southern Patagonia 



Riccardia prehensilis. His description is very clear, the account of 

 the epidermis being as follows : " Cellulae * * * corticales de- 

 presso-imbricatulae, i. c, apex cellulae papulosae supra cellulam 

 proximam parum protractus ; margo ubique hyalino subcrenulato." 

 He remarks further: " Aneura prehensilis (ex insula N. Zelandia) 

 multo robustior est, epidermide plano-cellidosa" 



In view of these conflicting opinions, I have consulted Taylor's 

 original specimens of Jungermannia preJiensilis from Hermite 

 Island. They are remarkably free from admixture and show the 

 peculiar papillose epidermis described above, indicating that the 

 Patagonian plant is to be looked upon as the true Aneura prehen- 

 silis (Hook. f. & Tayl.). The New Zealand plant with the 

 smooth epidermis is probably an unnamed species. 



The papilliform epidermal cells of Aneura prehensilis are some- 

 what variable in their distribution ; on some stems they occur on 

 both surfaces, on others, only on the antical surface, while on the 

 pinnules they are scattered and sometimes few in number. A 

 robust rachis is about 15 cells thick, but its cells are unlike 

 those found in most members of the genus; on the outside there 

 are one or two layers of rather thin- walled cells (including the 

 epidermis) and just inside these are two or three layers of cells 

 with very thick brown walls, the thickening being deposited un- 

 equally and leaving irregular cell -cavities ; the interior is filled 

 with cells having slightly thickened pale walls. These different 



vary 



preh 



enocaula of New Zealand. In this species the rachis, as de- 

 scribed by Leitgeb,* is essentially like that of the Patagonian plant- 

 The epidermis also shows papilliform cells, but the papillae, 

 instead of being appressed, stand out from the rachis at right 

 angles and give it a hirsute appearance. 



7. Aneura Spegazziniana (Massal.) Steph. Hedwigia 3 2 : I38- 



1893. 

 Riccardia Spegazziniana Massal. Nuovo Gior. Bot. Ital. 17 : 

 254- P^ 25. f. j2. 1885. 

 Fuegia. 



*Unters. iiber die Leberm. 3: 49. ig ?7 . 



