220 INTRODUCTION TO BOTANY. 
CoLuaRr. 
Collum, Coarctura, Limes communis, Fundus plante, 
Nodus vitalis. The plane interceding between the plumule 
and the radicle, which afterwards becomes that between the 
root and the stem; or the place where the fibres commence on 
the one hand to rise up, and on the other hand to descend. 
Ascending, Collum ascendens. Rising out of the ground 
in germination, along with the plumule and cotyledons. 
Abies, Mirabilis Jalapa, Avicennia. 
Descending, descendens. Burying itself deeper in the 
ground, during germination, along with the radicle. Da- 
masonium Dalechampii. 
As it is most frequently impossible to distinguish the 
collar while in the seed, from the radicle, it is usually come 
prehended under that name. 
PLANTULE. 
Plantula. The embryo when in a state of germination. 
Acrospire, Acrospira. The plumule when it first bursts 
out of the seed covers. 
Seed leaves, Folia seminalia. - The cotyledons when ex- 
panded by germination, and rising out of the ground. 
Such are the different varieties of form to be found in 
plants, taken in general; but a few tribes of them, such as 
ferns, mosses, lichens, alee or marine plants, and mush- 
rooms, differ so much in their structure, especially in the 
organs destined for reproduction, that they require peculiar 
terms to describe their parts. 
AGAMOUS AND CRYPTOGAMOUS PLANTS. 
Cormus, Anabasis, Frons. Every part of an agamous or 
cryptogamous plant, except the roots or holdfasts, and the 
organs of reproduction. 
Sporangium, Perisporium. The part that immediately 
contains the seeds or sporee, analogcus to the fruit of pha- 
herogamous plants. 
Spore, Spora, Sporata, Gongylus, Besimen. The repro- 
ductive corpuscles of agamous plants, analogous to the seed 
of sexual plants 
