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INTRODUCTION
TO BOTANY. 21 9>
Centrifugal, centnfiiga. Directed horisontally to the
side of the fruit. Ribes, Cucurbitace^e.
Centripetal, centripeta. Directed towards the centre of
the fruit. OEnothera, Citrus.
COLEORHIZE.
Appendage to the radicle. .
Coleorhiza.
A fleshy sac
enclosing the radicle; like a sheath. Gramineae, Cycas^^
Nj'mphaea, Saururus, Piper.
VlTELLUS.
I
A7iif part adhering to the emhryo, ivliich is neither cotyledon,
nor plumule, nor radicle, not extending heyond the seed,
and withering during germination.
bacillus. A fleshy part growing in the seed of hyacinthus
instead of the cotyledon, from which it does not seem
to diiTer.
Blastus. That part of an embryo with a large radicle
that enlarges during germination.
Blaslophore. That part that supports the blastus. This
is usually the vitellus of Gsertner.
Epihlastus. An anterior appendage to the blastus of
some gramineoe.
Rhiziophysis. Appendages prolonged beyond the extremities
of the radicles. Nenuphar.
TiaELLE.
Tigella. That part of the plumule ivhich lies between
the collar and the gemmule.
Visible, Tigella visibilis. Apparent before germination,
Trophseolura, Faba, Nelumbo, Damasonium Dalechampii.
Inconspicuous, invisibilis. Scarcely developed before the
seed germinates. Allium, Pinus.
Gemmule.
Gemmula. The small bud that is at the end of the
tigelle.
Sessile, Gemmula sessilis. The tigelle being inconspicuous,
the gemmule appears as if seated on the collar without
any tigelle. Calla iEthiopica.
Pileolated, pileolata. Hidden under a pileole. Gua-
jnineee, Scirpus.