PLATE 4 



Parasitism of Krameria canescens on different hosts. 



1, Auto-parasitism of Krameria ; only submersed part of baustorium is shown. 2, detail from young haustorial 

 cushion showing cells which form curving tissue of the mature organ. 3, Attachment of Krameria on Encelia 

 farinosa. 4, Penetration of haustorium to wood in root of Menodora tcabra. 5, Krameria on root of Parkintonia 

 microphylla, showing plugging of ducts of host. The heavy red margin indicates extent of formation ot cork in 

 hauslorfum. 6, Attachment of Krameria roots to root of Protopit velutina with formation of haustoria. 7, Attach- 

 ment of Krameria to Prosopis velutina, showing mature haustorium and its penetration into the woody cylinder of 

 host. 8, Attachment of Krameria, to root of Zizyphm parrvi. 9. Attachment of Krameria, experimentally pro- 

 duced, to root of Parkinsonia aculeata. 



