Studies in Teratology 



BT 



J. C. COSTERUS. 



With Plate L 



1. Prolification in Eudbeckia amplexicaulis. 



From Mr. J. J. Smith (Java) I received three remarkable 

 spécimens of the above plant, whicli he collected in the 

 Botanical Gardens August 1905. One of thèse spécimens 

 showed a séries of ligulate florets turned downwards and 

 altogether normal, next a zone, 2 cM. wide, of tubularpro- 

 liferous florets and finally a great number of normal ta- 

 bulai florets. 



In the first place I wish to say a few words about the 

 proliferous florets. For clearness' sake it should be men- 

 tioned that the normal tubular florets do not show much 

 peculiarity: from fig. 1 it appears that the style is orbic- 

 ulate at its base and bifurcates at the top into two 

 stigmas covered with rather bristly hairlets. 



The prolified florets are in the first place peduncled and 

 show a corolla of which the inferior part is urceolate and 

 the upper part infundibuliform quinquedentate (fig. 2). 

 The urceolate part encloses no ovary but lets the peduncle 

 pass which rises more or less above the corolla and always 

 ends in a secondary headlet. 



The pistil is, consequently, not présent, that is to say 

 in its ordinary shape, but as a matter of fact it is split up 

 into two leaflets (carpels) which are either hidden in the floret 



