Download PDF

254 EXPLANATION OF THE PLATES.
PLATE THE THIRTEENTH.
Fruits.
Fig. 1 . Hordeum Zeocriton. Graminece. Cariopsis magnified,
and partly uncoated.
a, Perisperm.
leaf.
h. Posterior cotyledon saucerlike.
c. Root mamillae, three, enclosed in a coleorhize.
d. Radicles two, each in a coleorhize.
e. Plumule; the gemmule having a piieolar, primordial
Fig. 2. Embryo of the same, magnified.
a. Cotyledon.
I. Root mamillae 3, in their coleorhizes.
c. Piieolar primordial leaf.
F'ig, 3. Orj^za sativa. Graminece. Cariopsis cut lengthways
and magnified.
a. Gemmule with its pileole, enclosed in the coleoptile.
I. Radicle in its coleorhize.
Fig. 4. Hieracium glaucum. Compositce. Embryo mag-
nified.
Fig. 5. Akenium of the same, magnified ; pappus sessile,
bristled, appearing simple to the naked eye : the pericarp is
cut open, and the seed divided longitudinally.
Fig. 6. Polygonum scandens. Polygonece. Carcerule cut
lengthways and dissected. Carcerule boney ; seed coated,
upright, perispermed ; embryo 2-cotyledon, lateral, threadlike,
bent; radicle opposite the hile, above.
Fio. 7. Chaerophyllum aromaticum. Umhelliferce. Cremocarpe
with the two coques separated, but remaining suspended
to the axis : magnified.
a. Spermapodium axile, 2-parted at top.
h. Styles persisting on the fruit.
c. Commissures, or the faces applied to each other,
d. Latuscule, or face opposite to the commissure.
e. Vallecules between the ribs of the coques.
J. Spermapodophore.
g. Stylopodium.
Fig. 8. A coque of the same cut lengthways and mag-
nified.
a. Perisperm, horny.
h. Integument of the coque.
C Embryo small, basilary.