222 INTRODUCTION TO BOTANY. 
Apophysis, Stroma. A swelling at the base of the urn. 
Polytrichum, Splachnum. 
- Calypira. The scarious or membranaceous remains of 
the perigonium, which is carried up with the urn when the 
pedicell lengthens, and which covers the operculum like 
a hood, . Pl. 20, fig. 3. 
Operculum. A cover that lies over the orifice of the urn. 
Pls20;1fes 9. 
Conjunctorium. ‘The very small operculum of the Andrza. 
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, 
155 16; 
Membranula. The fine membrane that supports the 
teeth of the peristome. l 
Teeth of the peristome, Dentes peristomatis, Blephare, 
— pogon. The small jags that sometimes surround the 
peristome. Pl. 20, fig. 15, 16. 
Barlula. The bearded edge of mosses, formed by the 
union of the teeth of the peristome. ‘Tortula. 
Epiphragme, Epiphragma. A membrane stretched across 
the peristome, which shuts up the urn. Polytrichum. 
Pl. 20, fig. 10. 
Fringe, Annulus, Fimbria. An elastic toothed mem- 
brane, situated under the operculum. 
Sporangidium. The panninterne of the urn. PI. 20, 
fig. 5. 
Columelle, Columella, Sporangidium. A threadlike pil- 
lar in the centre of the urn to which the seeds are attached. 
Pl. 20, fig. 5 c. ‘ 
Prosphyses. ‘Threads intermixed with the seeds or spores. 
Hepatica, &c. 
Capsule, Capsula, Involucrum, Receptaculum. The vessel 
containing the seeds or spore. Pl. 19, fig. 20, 21, 23. 
Elateres, crinule. ‘The elastic, membranous, twisted 
threads that first attach the sporee to the capsule, and when 
ripe, by their elasticity, disperse them. Pl. 19,afie.20e. 
Raphide: A kind of bivalve pericarpium containing 
spore. Anthoceros, Targionia. 
Globulus. The globular capsule of the jungermanniz. 
Colesula. A small membranaceous bag, containing sporae. 
Jungermanniz, Marchantia. 
Origoma. A conceptacle placed on the frond, resembling 
abasket. Marchantia. PI. 19, fig. 23 b. 
he 
