i
;ri
ir; Y-.:
i l l
to the German flora by M. B r u c h , a very active bryologist,
and bas found a place in the valuable Bryologia Germanica, in
progress of publication by my highly esteemed friends Dr N e e s
VON E s e n b e c k aud Dr H o r n s c h u c h . But these, in addition
to that of Great Britain, are tbe only general stations
known of this very rare species. It is distinguished from P.
serratum by the presence of a nerve ; from P. stenophyllum by
tbe thickness of the nerve, and the absence of regular serra-
tures; from P. colmrenshj the longer and narrower leaves, their
compressed and much broader nerve, and toothed margin.
Fig. 1. P. crassinervium, natural size. Fig. 2. Plants.
Fig. 4. Capsule. Fig. 5. Seeds: magnified.
Fig. 3. Leaves,
J .
