360 POLYPHYLLY. 
floral whorls and an elliptical outline. Whether the 
additional organs in this last case are the result of 
complete lateral chorisis or of multiplication proper I 
do not know. 
Orchids are very subject to an increase in the number 
of their labella. As illustrations may be cited an instance 
recorded by Mr. J. T. Moggridge in a flower of Ophrys 
insectifera, and in which there were two labella with- 
out any other visible deviation from the ordimary con- 
formation.’ 
I am indebted to Mr. Hemsley for the communication 
of a similar specimen in O. apifera, in which there 
were two divergent lips, each with the same peculiar 
markings. One of the sepals in this flower was 
adherent to one of the lateral petals. This augmenta- 
tion of the labella depends sometimes on the separation, 
one from the other, of the elements of which the lip is 
composed, at other times on the development, in the 
guise of lips, of stamens which are usually suppressed 
_ (see p. 380). 
The following enumeration will suffice to show the 
genera in which an increased number of petals or 
perianth-seoments in any given whorl most frequently 
occurs. 
Anemone! Solanum. 
Ranunculus! Veronica. 
Aconitum ! Cyclamen ! 
Raphanus. Primula ! 
Bunias. Anagallis ! 
Saponaria. Plumbago. 
Dianthus ! Jasminum. 
Pelargonium ! Syringa ! 
Hibiscus. Tradescantia. 
Fuchsia. Tris. 
Sarothamnus ! Tigridia. 
Lotus! Narcissus. 
Ulex! Tulipa. 
Prunus! Convallaria ! 
Trifolium. Paris ! 
Cinanthe and Umbellif. pl. ! Hyacinthus ! 
Sambnueus ! Allium ! 
Bryonia. Ornithegalum. 
Campanula. Orchidew, sp. pl. ! 
—E——— 

1 Seemann’s ‘ Journal of Botany,’ iv, p. 168, t. 47, f. 3. 
pn 
