ANDR@CIUM. 379 
Epacris impressa,' and there are analogous phenomena 
in the common honeysuckle (Lonicera Periclymenum), 
in which three corollas and no stamens often occur. 
This duplication may either be accounted for on the 
theory of chorisis above alluded to, or by supposing 
that the extra corolline whorl is due to a series of con- 
fluent petalodic stamens; that the latter is the true 
explanation, in certain cases at least, is shown by some 
flowers of Datura fastuosa, m which the second corolla 
was partially staminal in its appearance, and bore 
nearly perfect anthers, in addition to the five ordinary 
stamens, which were unaltered either in form or position. 
Some partially virescent honeysuckle flowers have a 
similar structure. 
There are other cases of apparent multiplication or 
duplication, due, probably, rather to the formation of 
outgrowths from the petals than to actual augmentation 
of their number. These excrescences occur sometimes 
on the inner surface of the petals, or of the corolla; 
at other times on the outer surface, as in some gloxinias, 
&e. This matter will be more fully treated of under 
the head of hypertrophy and enation. 
Pleiotaxy of the andrecium—An increase in the number 
of whorls in the stamens is very common, especially in 
cases where the number of circles of stamens is natu- 
rally large. The augmentation of the number of sta- 
mens is still more frequent where these organs are 
arranged, not in verticils, but in one continuous spiral 
line. 
In Crucifere there is always an indication of two 
whorls of stamens, and this indication is rendered 
even more apparent in some varieties accidentally met 
with. So in Saponaria, in Dianthus, and other Caryo- 
plyllee, three and four verticils of stamens have been 
met with. In Lonicera Periclymenwm a second whorl 
of stamens more or less petalodic sometimes occurs. 
Moquin mentions a variety of Rubus fruticosus in 
‘ *Seemann’s Journal of Botany,’ iil, p. 354, 
