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LEAFLET. One of the blades of a compound leaf.
PET'IOLULE.-The stem of a leaflet.

STI PELS.-The stipules of leaflets.

RA'CHIS.-The continuation of the petiole to which leaflets are attached.

FIG. 95.

Parts.

SCHEDULE NINE, DESCRIBING FIG. 95.

Rachis, Petiole, Leaflets.

No. of Leaflets. 17.

EXERCISE XVI.

Pinnate and Digitate Leaves.

FIG. 96.

FIG. 97.

[graphic]

Pinnate Leaf.

Parts?

In PINNATE Leaves, the leaflets grow along the sides of the

In DIGITATE Leaves, the leaflets all start together from the petiole.

SCHEDULE TEN, DESCRIBING FIG. 97.

Petiole Leaflets.

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ABRUPTLY PINNATE.-When the leaf terminates in a pair of leaflets. Fig. 98.

UNEQUALLY PINNATE.-When the leaf terminates in an odd, or single, leaflet. Fig. 9.

CIRROSE. When the rachis ends in slender branching curls, called tendrils. Fig. 100.

INTERRUPTEDLY PINNATE.-When the leaflets are alternately large and small. Fig. 101.

FIG. 102.

Twice Pinnate.

TWICE PINNATE.-When the petiolule is continued

as a rachis which bears the leaflets.

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THRICE PINNATE.-When the leaflets are borne upon a third rachis, branching off from the second.

EXERCISE XVIII.

Varieties of Digitate Leaves.

THREE-FINGERED.-A digitate leaf with three

leaflets.

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