144 



die AiifU'siuig der Eeihe der Amentacerv \ind die Einschaltring; der von Eic tiler an- 

 hangsweise als lly.^terop^y'.a vereinigten Familien an verschiedenen Stellen des 

 Systemcs. Pass die Amentacecv, welche bei Eichler die Cupul-fircp, die Jugttin'TacfCR, 

 Mifncw ea j , Stillcacea 1 , Casvarinnrea; wafa&seri, nicht einen natiirliehtn Verwandtschaft- 

 skreis darstellen, hat sich bei niiherer rntersiichung cler Sa. vind der Befruchtungs- 

 vorgiinge in netierer Zeit immer mehr heransgestellt, das3 die Aiifstelhing der Ilysttro- 

 pfiyt't nur ein Kotbelielf war, war bei der langst bekannten Verschiedenheit ihrer 

 Gynliceen von vornherein klar. 



The series, Amentaceas, of EICHLER, is a group, the members of which all 

 agree in having male catkin. Though we may break up this group and make 

 of it several groups, as ENGLER does, this is right only when the series is looked 

 at in the way described by ENGLER. Another alteration made by ENGLER on 

 the same occasion, is right only when viewed in the same light as that in 

 which he looks at it. In my judgement, on comparing the systems of the 

 great authors, such as BENTHAM- HOOKER, EICHLER, and ENGLER, his groups 

 appears to be not the most natural but rather the most convenient. 

 Then he proceeds to say : 



Die bciden Unterklassen der Dikotyledoneen, Archicldamydece rind MelaMamydea; . 

 oder Sympetala: sind beibelialten word.cn, obwobl eine scharfe Grenze zwischen densel- 

 ben nicht existiert. 



But, in my estimation, it is not enough in this case to say that there is but a 

 faint Hue of division between the two subclasses, but it should be added that there 

 is close inter-relation between the series of one subclass and those of the other. 

 The inter-relation is closely manifested between the Cucurbitales and the 

 Parietales ; between the Rubial.es on one side and the Parietales, Resales and 

 Umbelliflorre on the other ; between the Tubiflorse on one side and the Malvales, 

 Parietales and Rhoeadales on the other ; between the Contort* and the 

 Sapindales ; between the Ebeuales on one hand and the Rauales and Parietales 

 on the other ; between the Primulales and the Sapindales ; and finally between 

 the Ericales on one side and the Parietales and Sapindales on the other. 

 We shall explain this matter in detail as we go on in our discussion of series 

 after series. Here we see that to divide the Dicotyledones into the Archich- 

 lamydese and Metachlamydese is only right according to the view upon which 

 we dwell. But when viewed from another standpoint, it is not right. To 



1) ENGLER, A. Erl:iuterangen, 1. c. p. 362. 



