173 



Hoiet. The secunclaiy capitnlimi in this way created, is so to 

 say the reflected image (reduced) of the primary one. As is 

 well known, in the family of the Compositae, e. g. Heliantlms, 

 ligulate florets often present themselves on one or more of 

 the radii of the disk which is to be ascribed to incisions 

 in the common receptacle disappearing later on through 

 coalescence of the edges. In this way ligulate florets can 

 appear on the disk and even reach its centre. These cases 

 however cannot be adduced to account for ours, because h^ 

 there are no ligulate florets on one or more of the radii, which 

 ought to l)e so in case of lateral incisions 2'^d because the 

 central portion of the disk is perfectly entire and in the very 

 centre shows normal tubulate florets. It is also well known 

 that Sachs, who found the same deviation in Hellanthus 

 annuus '), was more inclined to admit a central injury of the 

 receptacle and subsequent formation of a new meristeme as 

 the cause of the phenomenon. Why in this fresh meristeme 

 the succession of floret and bract is turned inside out, remains 

 equally unexplained. 



Spilanthes oleracea L. 



Habitat the East Indies. 



Two specimens. The disk viewed from above of n°. 1 has 

 developed in one direction more than in any other and is 

 grooved in that same sense. In n°. 2 three grooves divide the 

 disk. In both specimens the peduncle is fasciated, twowinged 

 in n°. 1, threewinged in n°. 2. As the capitula in this species 

 are normally placed by twos and threes in the axils of the 

 leaves, the explanation of the above cases is selfevident. 



Coreopsis Druimnondil Torr. et Gray. 



Habitat Texas. 



Coll. October 1898. 



The variety going by the name of „Henand chickens". Penzig -) 



1) Lehrbuch der Botanik, 4e Aufl. p. 174. 



2) II, p. 69. 



