of Moquin.

FOOTNOTES:

[350] Moore, 'Nature Printed Ferns,' 8vo edition, vol. ii, p. 154, et p.
173.

[351] 'Flora (B. Z.),' 1821, vol. iv, p. 717, c. tab.

[352] Chavannes, 'Mon. Antirrh.'

[353] 'Bull. Soc. Bot. France,' t. vii, 1860, p. 877.

[354] Ibid., t. iv, 1857, p. 759.

[355] Jaeger, "De monstrosa folii _Phoenicis dactyliferae_
conformatione a Goetheo olim observata," 'Act. Acad. Leop. Car. Nat.
Cur.,' vol. xvii, suppl., p. 293, c. tab. color. iv.

[356] See Goethe, 'Ueber die spiral Tendenz.'

[357] See Darwin "On Climbing Plants," 'Journ. Linn. Soc. Botany,' vol.
ix, p. 5.

[358] 'Ephem. Nat. Cur.,' dec. 2, ann. 1, 1683, p. 68, fig. 14.

[359] 'Ann. des Scienc. Nat.,' third series, vol. i, 1844, p. 292.

[360] 'Flora' Feb. 4, 1858, p. 69, tab. ii, f. 3, and also 'Flora,'
1860, p. 737, tab. vii, f. 9.

[361] 'Bull. Acad, Belg.,' t. xvii, p. 196, "Lobelia," p. 53, c. tab.

[362] Moore, 'Nature-printed Ferns,' 8vo edition, vol. ii, p. 183.

[363] 'Bull. Soc. Bot. Fr.,' 1860, vol. vii, p. 461. See also Naudin,
'Ann. Sc. Nat.,' 4 ser., t. iv, p. 5. Clos, 'Bull. Soc. Bot. Fr.,' t.
iii, p. 546.

[364] London's 'Magazine Nat. Hist.,' vol. ii, p. 463.

[365] C. Morren, 'Bull. Acad. Belg.,' 1852, t. xix, part iii, p. 444.

CHAPTER II.

POLYMORPHY.

Usually the several organs of the same individual plant do not differ to
any great extent one from another. One adult leaf has nearly the same
appearance and dimensions as another; one flower resembles very closely
another flower of the same age and so on. Nevertheless it occasionally
happens that there is a very considerable difference in form in the same
organs, not only at different times, but it may also be at the same
time. Descriptive botanists recognise this occurrence in the case of
leaves, and apply the epithet heterophyllous to plants possessed of
these variable foliar characters. In the case of the flower, where
similar diversity of form occasionally exists, the term dimorphism is
used.

As these phenomena appear constantly in particular plants, they are
hardly to be looked on, under such circumstances, as abnormal, but where
they occur in plants not usually polymorphic, they may be considered as
coming within the scope of teratology.

=Heterophylly.=--As a general rule, the leaves or leaf-organs in each
portion of a plant, from the rhizome or underground axis, where it
exists, to the carpellary leaf, have their own special c