02 SYNOPSIS OF TflE EXTERNAL ORGANS OF PLANTS. 
Organs of nu- 
trinon, or parts 
necessary to the - 
growth of the 
plant. 
ORGANS OF PLANTS. 
THE ROOT. 
THE STEM. 
THE BUD. 
THE LEAF. 
APPENDAGES. 
STlBDrVISIONS. 
f NECK OR ROOT, STALK. 
< CAUDEX, 
I RADICLES. 
BRANCHES, 
PETIOLES, 
. PEDUNCLES, 
SCALES. 
LEAFETS. 
STIPULES, 
PRICKLES, 
THORNS, 
GLANDS, 
STINGS, 
SCALES, 
TENDRILS, 
PUBESCENCE, 
BRACTS. 
^ branchlets^ 
( boughs, 
■{ pedicels. 
Organs of re- 
production, or 
parts of fructi- 
fication. 
THE FLOWER. 
CALYX 
COROLLA 
THE FRUIT. 
PERICARP 
■{ sepals, or leaves, 
i petals. 
{ sometimes a part of the corolla 
( sometimes a separate organ. 
^ Jilament, 
i anther, — { pollen. 
stigma, 
style, 
ovary or germ, — ■{ ovules. 
Contains all parts of the fruit 
which are not the seed, as 
cells, 
valves, 
dissepiments, 
columella, 
hilum., 
albumen, 
cotyledons. 
LECTURE XVII. 
PHYSIOLOGICAL VIEWS — GERMINATION OF THE SEEIn 
We have traced the various organs of the plant, through their suc- 
cessive stages of development, n om the root to the bud, leaf, and 
flower, and from the flower to the fruit and seed. We have seen, in 
imagination, the vegetable world fading under a change of tempera- 
ture, the " sear and yellow leaf" becoming a prey to the autumnal 
blasts, and even the fruits themselves exhibiting a mass of decayed 
matter. Were this appearance of decay and death now pre- 
sented to us for the first time, how gloomy would be the prospect \ 
How little should we expect the return of life, and beauty, and fra- 
grance ! No power short of Omnipotence, could effect this ; it is in- 
deed a miracle ! But we are so accustomed to these changes, that, 
" seeing, we perceive not ;" we think not of the mighty Being who 
produces them ; we call them the operations of nature; but what is 
Enumerate the organs of nutrition— Of reproduction— What are the parts of the 
root 7 — The Stem — Bud — Leaf— Different kinds of Appendages — Divisions of the ca- 
lyx—Corolla — Nectary— Stamens— Pistil— What are the parts of the fruit?— What 
are the parts of the pericarp 7— Parts of the <»eed— Of the Embryo — What remarks 
commence this lecture? 
