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2*22 INTRODUCTION TO BOTANY.
Apophysis, Stroma. A swelling at the base of the urn.
Polytrichum, Splachnum.
Calypira. The scarious or membranaceous remams of
the perigonium, which is carried up with the urn when the
pedicell lengthens, and v/hich covers the operculum like
a hood. PL 20, fig. 3.
Operculum. A cover that lies over the orifice of the urn..
PI. 20, fig. 9.
Conjunctorium. The very small operculum of the Andrsea.
Peristome, Peristoma. The edge of the opening into the
urn, which is sometimes naked, sometimes surrounded with
a single or double row of teeth. PL 20, fig. 9, 10, 12, 14,
15,16.
Memhranida. The fine membrane that supports the
teeth of the peristome.
Teeth of the peristome. Denies peristomaiis, Blepharce,
— pogon. The small jags that sometimes surround the
peristome. PL 20, fig. 15, 16.
Barhula. The bearded edge of mosses, formed by the
union of the teeth of the peristome. Tortula.
Epiphragme, Epipliragma. A membrane stretched across
the peristome, which shuts up the urn. Polytrichum.
PL 20, fig. 10.
Fringe, Annulus, Fimbria. An elastic toothed membrane,
situated under the operculum,
Sporangidium. The panninterne of the urn. PL 20,
fig. 5.
Colunielle, Columella, SporangidiiLm. A threadlike pil-
lar in the centre of the urn to which the seeds are attached.
PL 20, fig. 5 c.
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Prospkyses. Threads intermixed with the seeds or spores.
PIepatic/e, Sec.
Capsule, Capsula, Involucrum, Receptaculum. The vessel
containing the seeds or sporse. PL 19, fig. 20, 21, 23.
Fjlaieres, criiiulcB. The elastic, membranous, twisted
threads that first attach the sporse to the capsule, and when
ripe, by their elasticity, disperse them. PL 19, fig. 20 e.
Rap/iida: A kind of bivalve pericarpium containing
sporae. Anthoceros, Tai'gionia.
Globulus. The globular capsule of the jungermanniag.
Colesula. A small membranaceous bag, containing sporse.
JungermanniEe, Marchantia.
Origoma. A conceptacle placed on the frond, resembling
a basket. Marchantia. PI. 19, fig. 23 b.