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PLATE 15. CONTINUed.

A. The stamen-bearing spike.

b. One of the florets separated, consisting of a glume and 3 stamens.

C. The pistil-bearing spikes.

d. One of the florets separated, consisting of a pistil constituted of a germen, two styles, and a glume which protects them.

It is also an example of the order Triandria, having three stamens. 22. Diœcia, stamens and pistils in separate flowers on separate plants of the same species; Willow, Salix.

A. A stamen-bearing ament.

b. A floret separated, consisting of two stamens protected by a scale.

C. A pistil-bearing ament.

d. One of the florets separated, consisting of a pistil protected by a scale.

It is also an example of the order Diandria, having two stamens. Fig. 23. Polygamia, stamens and pistils separate in some flowers, united in others, either on the same plant, or on two or three separate ones of the same species; Fig, Ficus. a. A stamen-bearing flower. b. A pistil-bearing flower.

c. A perfect flower.

It is likewise an example of the order Tria cia, the three kinds of flowers being on three different trees.

24. Cryptogamia, stamens and pistils obscure.

A. A a Fern, Polypod, Polypodium vulgaris.

b. The patches of fructification.

C. Hair-cap Moss, Polytrichum.

D. Scarlet Lichen, Lichen cocineus.

The above are examples of three of the orders of Cryptogamia, viz. Filices, Musci, and Hepaticæ.

Several of the 24 classes of Linnæus have been abandoned by several eminent botanists. The classes Polyadelphia and Polygamia particularly have been rejected, and the plants distributed in other classes. These are rejected in Eaton's "Manual," which is consequently arranged under 22 classes.

PLATE 16.

COMPOUND FLOWERS.―p. 70.

Fig. 1. A compound radiate Flower. Field Dasiy.

a. The ray or external circle of florets.

b. The disk or centre.

c. A ligulate floret of the ray separated.
d. A tubular floret of the disk separated.

2. A ligulate Flower. Dandelion.

a. One of the florets separated. 3. A Discoid flower. Burdock.

a. A floret separated.

SEEDS.

4. A Seed and its appendages.

a. The seed.

b. The stipe.

c. The pappus or down. p. 60.

5. The wing of a seed. p. 61

6. A seed having one cotyledon. p. 60.
7. A seed having two cotyledons. p. 60.

a. a. The cotyledons.

b. c. The corcule.

b. The radicle, and
c. The plume.

8. A seed having many cotyledons. p. 60.
9. Seminal leaves. p. 60.

10. Anatomy of wood. p. 104.

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INDEX.

Abrupt leaf. See truncated, 29.
Abruptly branched stem, 11.
Abruptly pinnate leaf, 36.
Abrupt root, 7.
Acerose leaf, 27.
Acinus, 59.

Aculeus. See Prickle, 39.
Acotyledonous plants, 60.
Acute leaf, 30.
Equalis polygamia, 71.
Aggregate flower, 62, 63.
raceme, 40.

Ala. See Wings, 52.
Albumen, 101.

Alburnum, 105.

Aerology, 1.

Alienated leaf, 34.

Alpine plants, 2.
Alternate leaves, 23.

Alternately pinnated leaf, 36.

Ament, 48.

Amentaceous flower, 63.

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Amplexicaul leaves, 25.

Anceps caulis.

See two-edged

Blistery leaf, 32.

stem, 13.

Angiospermia, 69.

Annual, 6.

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Brachiatus caulis.

See Four-

Arrow-shaped leaf. See Sagit-

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BUDS, 20.

Bulbous roots, 8.

Butterfly-shaped corolla.
Papilionaceous, 52.

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See

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