i; + RAFFLESIACEAE 



Several species are cultivated in gardens and on 

 trellises, among them the European A. Clematitis^ the 

 North American A. Sipho (Dutchman's pipe), the South 

 American /I. brasiliensis^ which has a 2 -lipped perianth, 

 and A. gigantea^ with a large salver-shaped flower. 



Fam. 14. Rafflesiaceae. Tribe Cytineae. 



(Plate 43.) 



Fleshy root parasites. Inflorescence few- flowered, 

 racemose. Dioecious. 



Calyx tubular, regular, 4- or 6-parted, with 4 or 6 

 large nectariferous cavities between the perianth-segments. 

 Male flowers: stamens 8 or 12, sometimes a few abortive, 

 all united into a central column with vertically 

 placed anthers and short projecting connectives. Female 

 flowers known of one species only : ovary inferior, 

 1 -celled, showing the 6 nectariferous tubes as swollen 

 ridges on its outer side; style thick, the stigma fleshy, 

 capitate, faintly radiate-lobed ; placentae 12, parietal; 

 ovules very numerous. 



To this family (Tribe Rafflesieae) belongs the 

 famous Rafflesia Arnoldi, the largest flower known, which 

 has a diameter of over 3 feet. It is parasitic on the roots 

 of a climbing Cissus in the forests of Sumatra. 



Pilostyles acthiopica (Tribe A p o d a 11 1 h e a e) , a tiny , 

 blood red parasite only a few millimetres in diameter, 

 occurs in clusters on the branches of trees in Angola 

 and Rhodesia. 



The only genus. Flor. Cap. Vol. v, I, 485. 



Cytinus /.. 



