260 PHYLLODY 



lu the preceding instances the fohaceous condition 

 has pervaded the entire pistil, or at any rate the basal 



Fig. 139. Flower of Triumfetta, sp., carpels represented by five 

 leaves. 



portion or ovary, and it may be noticed that the ovary 

 is thus shown to consist in some cases of the sheath 

 of the leaf, as in Aquilegia ; in other cases of the blade, 

 as in Cerasus, Daucus, &c. 



There are cases, however, in which a part only 

 of the pistillary structure thus becomes foliaceous. 

 Linnaeus, * Prolepsis,' 9, mentions some flowers of 

 Carduus heterophyllus and G. tataricus in which the 

 style had grown into two green leaflets, and in which 

 the calyx and corolla were also leaf-like. A very 

 singular instance is recorded by Baillon,^ wherein the 

 pistil of TrifoUiim repens consisted of three carpels, 

 either separate, or combined so as to form a one-celled 

 ovary Avith three parietal, pluri-ovulate placentae ; the 

 ovary in these flowers was formed of the basal vagini- 

 form part of the leaf; the three styles were formed by 

 the petioles, while the stigmas were represented by 

 tri-foliolate leaves. The back of the leaf in these 

 cases is usually directed away from the centre of the 



' ' Adansonia,' iv, p. 70. A similar deviation has been observed by 

 M. van Tieghem in tne ovary of Tropoiolnm vwjus, ' Bull. Soc. Bot. Fr.,' 

 JHm. J, 111. 



