2678
J U N G E RMA N N IA hyalina.
Diaphanous 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 ascending, flexuose, simple or dichotomous.
Leaves roundish, slightly undulate.
Fruit terminal. Calyx oblong, angled, half
immersed; the mouth contracted, 4-toothed.
Syn. Jungermannia hyalina. l/yell, MSS. Hook.
Brit. Jung. t. 63. Hook. Taylor, Muse. Brit,
ed. 2.229.
S t e m s forming lax tufts, ascending, an inch or more in
length, simple or branched with innovations. Leaves bifa-
riously inserted, spreading, or sometimes secund, of a glossy
and semipellucid green, roundish, entire or retuse, waved,
of a thin texture, with rounded cellules, those of the margin
being the largest. Perichaetial leaves similar to the rest,
but broader upwards. Calyx terminal (but, from innovations,
often appearing lateral, and even bearing two calyces
at the same time), oblong, often not more than half exsertfed
beyond the perichaetial leaves, plaited and angled, the mouth
contracted and 4-toothed. Fruit-stalk about twice or thrice
as long as the calyx. Capsule ovato-rotundate, of a deep
brown colour.
J . hyalina is a species for the discovery and for the distinguishing
characters of which we are indebted to Charles
Lyell, Esq., who first found it in boggy places in the neigh