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JUNGERMANNIA planifolia.
Flat-leaved Jungermannia.
CRYPTOGAMIA Hepaticce.
Gen. Char. Common receptacle of the fruit none.
Perianth or Calyx monophyllous, tubular (rarely-
wanting). Capsule 4-valved, terminating a peduncle
which is longer than the perianth.
Spec. Char. Stem erect, nearly simple. Leaves unequally
two-lobed, bipartite to the base, dentato-
ciliate; lobes conduplicate, quite plane; thelower
ones larger, ovate; the upper ones cordate, obtuse.
Syn. Jungermannia planifolia. Hook. Brit. Jung,
t. 77. Hook. 8$ Tayl. Muse. Brit. ed. 2.232.
T ?H IS may well be considered among the rarest of the
British species of the beautiful genus Jungermannia. Its
first discovery is due to the late Mr. Don, who detected it
upon Ben-y-mac-duich (or davie, as Mr. Don spells it),
the second highest mountain in Scotland, in 1812. In the
following year Dr. Taylor gathered it upon Brandon mountain
in the west of Ireland, and in March of the present year
Mr. W. Wilson found it in Cwm Id well, North Wales
after having gathered it in its Irish station the preceding-
autumn. Mr. Arnott and myself met with the plant, in an
excursion we lately made, among moist rocks at the head of
Loch Avon; but as one of the shoulders of Ben-y-mac-duich
may be considered to extend to this spot, it is probably the
same with Mr. Don s habitat; and it was there growing in
the greatest profusion, intermixed with the still more rare