Plumbago.
Jasminum.
Syringa!
Tradescantia.
Iris.
Tigridia.
Narcissus.
Tulipa.
Convallaria!
Paris!
Hyacinthus!
Allium!
Ornithogalum.
Orchideae, sp. pl.!

For other illustrations see multiplication of whorls, petalody;
see also Moquin, loc. cit., p. 350. Engelmann, loc. cit., p.
20, Sec. 18. Cramer, loc. cit., p. 25.

=Polyphylly of the androecium.=--An increased number of stamens
frequently accompanies the corresponding alterations in other whorls,
and seems, if anything, to be more frequent among monocotyledonous
plants than among dicotyledonous ones; thus, we occasionally find
tetramerous flowers in _Crocus_, _Hyacinthus_, _Tulipa_, _Iris_,
_Tigridia_, &c., and more rarely in _Yucca_ (_Y. flexilis_[401]).

The increased number of stamens in a single whorl may result from a
development of organs usually suppressed, and constitute a form of
regular peloria as in _Linaria_, wherein a fifth stamen is occasionally
met with. Among normally didynamous plants such numerical restitution,
so to speak, is not unusual; thus, in _Veronica_ four and five stamens
occur. Fresenius has seen five stamens in _Lamium_, _Mentha_,
_Chelone_;[402] Bentham in _Melittis_, and other instances are cited
under the head of peloria. Chorisis may also serve to account for some
of these cases; thus, Eichler[403] figures a flower of _Matthiola annua_
with five long stamens instead of four; one of the long pairs of stamens
has here undergone a greater degree of repetition than usual. De
Candolle[404] cites and figures a curious form of _Capsella
Bursa-pastoris_ sent him by Jacquin, and which was to some extent
reproduced by seed. In the flowers of this variety there were no petals,
but ten stamens; hence De Candolle inferred that the petals were here
replaced by stamens, but Moquin[405] objects, and with justice, to this
view, as the ten stamens are all on the same line; he considers the
additional stamens to be the result of chorisis. Buchenau[406] mentions
the presence of seven stamens in another Crucifer, _Ionopsidium
acaule_. Here the supernumerary organ was placed between two of the long
stamens. The effect of chorisis in producing an augmentation of parts is
well seen in some plants that have some of their flowers provided with
staminodes or abortive stamens, and others with clusters or phalanges of
perfect stamens. Thus, in the female flowers of _Liquidambar_ there are
five small staminodes