390 PLEIOTAXY. 
of the same plant for two years consecutively. In 
Aquilegia T have met with a similar increase in the 
whorls of carpels.’ Meissner records a similar aug- 
mentation in Polygonwm orientale.’ 
Wigand’ describes and figures a flower of Vinca 
minor, in which there were two carpels intervening 
between the ordinary pair, and a similar illustration 
has been observed by the writer in Allamanda cathar- 
tica. Wichler* has put on record a similar case in a 
capparid. 
Marchand’ mentions a polycarpellary berberid (Hpi- 
medium Musschianum). The supernumerary carpels 
in this flower were placed on a short axis, which origi- 
nated in the axils of the stamens, and as these latter 
organs were present in their usual number and position, 
the adventitious carpels could not be considered as 
resulting from a transformation, or substitution of 
carpels for stamens. 
Lastly, the instance cited by Dr. Allman® in Saai- 
fraga Geum ray be alluded to. Here there was a row 
of adventitious carpels between the stamens and pistils, 
the backs of the carpels being turned towards the 
axis of the flowers. Dr. Allman explains the presence 
of the supernumerary parts by the supposed production 
of a whorl of secondary axes between the stamens and 
the centre of the flower. These axes are further sup- 
posed to bear imperfect flowers, of which the additional 
carpels are the only traces, but this explanation seems 
forced. : : 
In addition to the references already cited the follow- 
ing may be given: 
Duchartre, ‘ Ann. Se. Nat.,’ 4 ser., vii, p. 23 (Tulip). 
Ferrari, ‘ Hesperides,’ pp. 271, 395, 405. Duchartre, ‘Ann. Se. Nat.,’ 


‘Linn. Trans.,’ t. xxiii, p. 3 
‘Monog. Polygon,’ pl. 3, K 
1 64, tab. 34, fig. 5. 
2 f. 
3 ¢ Plora,’ 1856, tab. viii. 
4 
Sole YN 
Thid., 1865, tab. ix, f. 6. 
> * Adansonia,’ vol. iv, 1864, p. 127. ¥ 
6 * Ann. Nat. Hist.,’ 1845, vol. xvi, p. 126. 
