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Saoh a siatstance may be a chromogen of tamiic nature the presence of 

 which may be inherent within the yoiing, colorless cyanoplast, since it may 

 be colored in a particular manner by the use of salts of iron, osmic acid, 

 amd potassium bichromate. 



Finally, so far as concerns the biologic significance of the bodies 

 in question, I believe that they should be considered as specific organs on 

 which depends the production of anthocyanine. 



Facts analogous to those described for Billbergia nutans I have found 

 in my study of many other plants, such, for example, as the following: 



Liliaceae: Convallaria ,iat)onica Linn, (frutti). 



Iridaceae: Iris fimbriata . Vent, (f iori) . 



Orchidaceae: Laelia anceps Lindl. (f iori) . 



Banunculaceae: Aquilegia glandulosa Fisch. (f iori) . 



Ericaceae: Erica carnea Linn, (fieri). 



Labiatae: Nepeta glechoma Benth. (fiori)^ 



Verbenaceae : Clerodendron Balfour i Hort. (f iori) , 



Caprifoliaceae: Weigela rosea Lindl., Weigela .iaponica Thianb. var. 

 rosea (f iori) . 



