every conceivable intermediate
gradation.[349]

The following list will serve to show what plants are most subject to
this anomaly. It is difficult to draw any accurate inference from this
enumeration, but attention may be called to the frequency of this
occurrence in certain plants, such as the _Sempervivum_, the wallflower,
the poppy, and the heath. Why these plants should specially be subject
to these changes cannot be at present stated.

By the student of animal physiology such a change as above
described--equivalent to the substitution of an ovary or a uterus for a
testis--would be looked on as next to impossible; the simpler and less
specialised structure of plants renders such a change in them far more
easy of comprehension.

Thalictrum minus.
Delphinium elatum.
Magnolia fuscata.
Bocconia cordata.
*Papaver bracteatum!
* somniferum!
nudicaule.
Dionaea muscipula!
Barbarea vulgaris.
*Cheiranthus Cheiri!
Cochlearia Armoracia.
Tropaeolum majus.
Citrus Aurantium.
*Sempervivum tectorum!
montanum.
Begonia frigida!
Cucumis, sp.
Cucurbita Pepo.
Pyrus Malus.
Rosa arvensis!
Saxifraga crassifolia!
Myrtus, sp.
Campanula rapunculoides.
Polemonium caeruleum.
Gentiana Amarella.
*Erica Tetralix.
Stachys germanica.
Primula acaulis.
Rumex crispus.
*Salix, sp. plur.!
Euphorbia esula.
Glochidion.
Asphodelus ramosus.
Amaryllis.
Lilium tigrinum!
longiflorum.
*Tulipa Gesneriana!
var. cult. plurim.!
Hemerocallis.
Zea Mays.
Bambusa, sp.

=Pistillody of the ovule.=--An instance of this extraordinary
transformation in the carnation, as observed by the Rev. Mr. Berkeley,
is given at p. 268.

FOOTNOTES:

[295] 'Neue Denkschrift. Schweiz. Gesellsch.,' band v, p. 9.

[296] 'Bull. Acad. Belg.,' xix, part 2, p. 93.

[297] Schlechtendal, 'Linnaea,' ix, p. 737.

[298] Misbilld., 'Cult. Gewachs.,' p. 32.

[299] Linn., 'Phil. Botan.,' Sec. 120.

[300] 'Bull. Soc. Bot. France,' 1859, vol. vi, p. 199.

[301] Seemann's 'Journal of Botany,' vol. iii, p. 105; also Morren,
'Bull. Acad. Belg.,' vol. xx, part 2, p. 264.

[302] Morren, 'Bull. Belg.,' xviii, p. 503.

[303] 'Organ. Veg.,' t. i, p. 513.

[304] 'Bull. Acad. Roy. Belg.,' tome xvii; and Lobelia, p. 65.

[305] Masters, "On Double Flowers," 'Rep. Internat. Bot. Congress,'
London, 1866. p. 127.

[306] See also C. Morren, "Su