BRITISH JUNGERMANNLE. 
( J. pumila. J 
Jungermannia pumila is distinguishable from barren specimens of J. scalaris and J. crenulata 
by its more ovate leaves and much smaller size; from J. lanceolata by its leaves being concave, 
whereas in the species last mentioned their surface is always plane. The singular form of the 
calyx will serve to keep it distinct from every other species. 
Although an alpine plant, J. pumila seems not at all particular in its choice of soil. Some 
of my Irish specimens are attached to a stiff clay : in Yorkshire I have found it glowing upon 
hard lime- stone rock ; and in Scotland I have gathered it from the micaceous schistus of the 
Breadalbane mountains. 
REFERENCES TO THE PLATE. 
fig. 
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A small patch of J. pumila , natural size. 
A single plant of the same, natural size. 
The same, magnified 
Extremity of a fertile shoot 
Calyptra and young capsule 
Seeds and spiral filaments 
Var. /3, natural size. 
The same, magnified 
Extremity of a fertile plant of a, with the shoot projecting beyond the calyx 
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1 
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