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240 EXPLANATION OF THE PLATES.
PLATE THE FOURTH.
Leaves.
Fig. 1. Poa arenosa. GraminecB.
a. Leaf long, linear.
b. Petiole sheathing ; sheath slit.
c. Ligule scalelike.
Fig. 9.. Plantago. Plantaginece. Leaf oval, rounded,
pointed, many-ribbed.
Fig. 3. Chamserops humilis. Palmce. Leaves terminal,
crowning, petioled, fanshaped, digitate, folded when young
petioles having foliolean spines.
Fig. 4. Podocarpus elongata. Co7iifercB. Leaf linear.
Fig. 5. Pinus Strobus. Abietidece. Leaves fasciculate,
in fives, needlelike.
Fig. 6. Vitis-Idsea punctifolia. Vhcciniece. Leaf oval,
not in the least cut, dotted ; edge cartilaginous.
Fig, 7. Sida rhombifolia. Malvacece. Leaf nearly rhomboid,
lanceolate, toothed.
Fig. 8. Quercus longseva. Corylidece. Leaf oblong,
sinuated.
Fig. 9. Barbarea vulgaris. Cniciferce. Leaf lyrate.
Fig. 10. Salvia officinalis. Labiatce. Leaf oval, lanceolate,
eared, crenulate.
Fig. 1 1 . Taraxacum officinale. Composite. Leaf run-
cinate.
Fig. 12. Solanum pyracanthos. Solanece. Leaf lanceolate,
nearly pinnatifid, thorny.
Fig. 13. Sonchus fruticosus. Compositce. Leaf lanceo-
late, pinnatifid.
Fig. J 4. Potentilla anserina. Dryadece. Leaf interruptedly
pinnate, jointless.
Fig. 15. Cassia occidentalis. LeguminoscB. Leaf paripiunated,
jointed; petiole having a cupshape gland a at
the base.
Fig. 16. Gleditsia monosperraa. LeguminoscB. Leaf
pari-pinnate, jointed ; secondary petioles three-paired ; leaflets
many-paired; spine super-axillary, three-forked.
Fig. 17. Vicia. LeguminoscB. Leaf impari-pinnate,
jointed, tendril bearing.
Fig. 18. Coreopsis lerulaefolia. Compositce. Leafbipin-
nate, twice compounded, jointless.
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