lb 



■I 



Relation between Crystals of Galoixim 

 Oxalate and Elaiopl^sts* 

 The atithors who have occupied themselves with a study of the relation 

 between crystals of calcium oxalate and elaioplasts are the following: 



Wakksr observed that in the epidermal cells of Vanill a nlanifolia y 

 contemporaneously with thedisappearaiice of the elaioplasts, there appeared 

 crystals of calcium oxalate, Hfe, howeVei", noted that in V. aroiaatica 

 latifolia the epidermal cell6, although in the young stage being supplied with 

 elaioplasts, lacked the production of crystals in the successive stages of 

 their development and forced^thm to the conclusion that the crystals of the 

 epidermis of 1» p lanifolia could have no direct relation to the elaioplasts ► 



Warlich (?) substojuently observed that the elaioplasts in Vanilla 

 planifolia in the advanced stages of their development became birefractile and 

 that in their interior there is formed a crystal of calcium oxalate which was 

 later disclosed. Besides this, there is always in the adult epidermal cell 

 accompanying the crystal a birefractile rotvmd body which shows a black cross. 

 It. might probably represent the ultimate residuum of the elaioplast.. The 

 conclusion at w^hich this author arrives is opposed to that of Y/akkBr^ since 

 he believes that there exists in this case a special relationship between 

 the elaioplasts and t,la& crystals of calcium oxalate. Relative to such an 

 opinion as the above, Zinanerraann expresses himself as follows': 



These facts, however, appear to me to recjuire confirmation. In any 

 event, it can not be said to be true of the occurrence of such phenomena. 

 Thus WiskkBT assdrts that a cultivated species under the name of Vanilla 



