360 POLYPHILLY. 



floral whorls and an elliptical outline. Whether the 

 additional organs in this last case are the result of 

 complete lateral chorisis or of multiphcation proper I 

 do not know. 



Orchids are vei*y 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 ordinary con- 

 formation.^ 



I am indebted to Mr. Hemsley for the communication 

 of a similar specimen in 0. 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-segments in any given whorl most frequently 

 occurs. 



Anemone ! Solanum. 



BanunculuB I Vei'onica. 



Aconitum ! Cyclamen ! 



Raplianus. Primula ! 



Bunias. Anagallis ! 



Saponaria. Plumbago. 



Diautlius ! Jasminum. 



Pelargonium ! Syringa ! 



Hibiscus. Tradescantia. 



Fuchsia. Iris. 



Sarothamnus ! Tigi'idia. 



Lotus ! Narcissus. 



Ulex ! Tulipa. 



Prunus ! Convallaria I 



Trifolium. Pains ! 



(Enanthe and Umbellif, pi, ! Hyacinthus 1 



Sambuuus I Allium ! 



Biyonia. Ornitbogalum. 



Campaoubi. Orcbidese, sp. pi. ! 



' Seemanu'K .)..miial -.t' lioiiiny.' iv, p. 1H8. t. 47. f. :{. 



