JUNGERMANIA. 333 



I. Slieve Glah, Co. Cavan, D. McArd/c ; 13enbulben, Co. Sligo, 

 D. McArdh. 



Found on the Continent and in North America. 



Obs. — This species is nearly rehited to Jiuiger mania ventricom 

 (Dicks.), and its var. porjjhyroleuca (Nees), on the one hand, and 

 JiuH/ermama baiitrlensi^ var. acuta (Lindenb.), on the other. 



On examination of numerous specimens from several collectors, 

 and those given in different Fasciculi, I am confirmed in the 

 opinion that some uncertainty exists as to its characters. In my 

 copy of Austin's Hep. Am-Bor., the specimens would refer better 

 to a form of Jungermania ventricosa, which may have been given 

 in mistake, for 1 have good typical specimens from the same 

 station (White Mountains, Oakes). According to Crypt. Bad. 

 n. 96li, J((ngeriuaina aJpe^itris a. latior is a form also qI Jungermania 

 ventricosa, having the violet cortical stem layer, subquadrate 

 leaves with more acute segments, but exactly the same type is 

 given in G. & R. Hep. Eur. n. 304 and n. 264 as Jnngerniania 

 ventricosa. 



To add to the confusion, I have specimens from Schleicher's 

 Cent. n. 59, which are {ecc parte) the original Jang, alpestris, but my 

 specimens are Jungermania bantriensis var. Aluelleri (Nees), having 

 the subulate stipules on all the stems. In Carr. k Pears. Hep. 

 Brit. Fasci. II. n. 110 is given a small iorm of Jungermania 

 aljjestris as var. geJida (Tayl.), but since it was publislied I have 

 had the opportunity of examining the original specimens of 

 Taylor, and am inclined to look upon the type as quite a distinct 

 species (see Jungermania gelida, Tayl.). 



From Jungermania ventricosa Dicks, and its var. jjorjjiigrolcuca 

 (Nees), J. a/pest ris maybe distinguished by its often slenderer and 

 more graceful stems, with smaller leaves, which are rounder, not 

 subquadrate, with a wider and shallower sinus, the cortical layer 

 of the stem being destitute of the violet colouring, the bracts only 

 bifid, perianth narrower. 



Jungermania /jantriensis var. acuta (Lindenb.) is more delicate,^ 

 of a darker green colour, leaves more oval, with narrow sinus. 



