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moiisly branched. Lea v e s s light ly adpressed,
ovate-oblong, plane or indist inct ly decurved
at the apex, margin quite entire, lobule
minute, plane not decurved, spreading from
the stem ; st ipules adpressed to the stem,
s light ly decurrent , obtuse rotundate.
Porella pinnata, Lindb. Moore Ir. Crypt .
619 ; Carr, and Pears. Exs. No. 132. Ju ngermannia
Cordeann, Hub. Hep. Germ. 291.
Madotheca porella, Ne e s Eur. Leb. 3, 201 ;
Cooke Hep. fig. 146.
On wet stones, trunks, &c.
var. p densa. Branches shor te r ; leaves
larger, cont iguous and plane, or imbricated,
and rather convex, lobule obtuse.— Dicks.
Linn. Trans. III., t. 20, f. i.
Stems 2 to 4 inches long,
pinnately branched, the forked
branches spreading, leaves distantly
placed, the lower lobe
smallest (fig. 47), pressed to
the stem and flat. Stipules
rather square. Mouth of the
perianth with small round
notches.— {Plate 2, Jig. 21.)
47-
Sub-tribe I II. PTIL IDE cE .
Female f lowers either a lwa y s on the stem
or on a lateral branch (never postical), longer
or shorter, terminal. Lea v e s incubous, or
succubous, leaflets (a lwa y s present) near ly of
equal size, conforming, hi- or multi-fid.
There can be no doubt of the close relationship of
the plants combined in this group, theirmost obvious
character being the equably tristichous cloven
leaves, whereof the postical are nearly, or quite as
large as the lateral, and are never absent in any
species. The polyphyllous female involucres
always borne either on the apex of the stem or
of a side branch— never on a postical branch,
although such branches exist in, at least, two
genera— afford another good and very constant
character.— Spt'uce.
G en u s 6. PTILIDIUM, Nees.
Involucre two to three leaved, leaves
appressed, two or three lobed, divided, elongated
ciliate; perianth twice as long as the
perichsetium, clavate, inflated, rather plicate at
the apex ; mouth contracted, toothed ; capsule
four-valved, coriaceous, naked; elaters geminate,
naked, deciduous. Ptilidium, Ne e s Eur.
Leb. (1833) I., p. 95. Blepliarozia, Dumort.
Syll. p. 46.
Stipulate, leaves incurrent, two-lobed, condupli-
cate.
Ptilidium ciliare, Linn., Dum.
Stem procumbent, pinnate, branches alterft
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