

56 



MB. BEKXnAM ON LOGANIACE-S:. 



been establishecl aa orders, adopting as essential those characters 

 which had occasioned their separation from ApocynecB^ Gentiane^y 

 or other free Monopetalous orders. As they were now, however, 

 brought into contact with a new set of affinities, many of these 

 characters became much altered m value. Thus, aestivation of the 

 corolla, for instance, is of great value among Scroplnilarinece, Apo- 

 cyneiSy and their allies, in the distinction of tribes or even of orders, 

 but among Rubiacece is available for little more than for the sepa- 

 ration of genera ; and as long as Loganiacece were thought to be 

 most closely connected with the former families, near which the 

 elder DeCandolle placed them, he very naturally attached great 

 importance to this character. But now that we bring them into 

 contact rather with Bubiacecd, that importance, as observed by 

 Alphonse DeCandolle in his notes, becomes much lessened in our 

 eyes. liegarding indeed Loganiacece^ as noAv generally admitted, 

 as Subiacece with a free ovary, — a sort of artificial offset from that 

 family, it appears to be the more philosophical as well as the more 

 practically convenient course, to divide them as nearly as possible 

 according to the same principles as those adopted in classing i2w- 

 hiacecB themselves. 



Of the thirteen tribes adopted by DeCandolle in the division 

 of Buhiacecdy there are a few, founded chiefly on number of parts, 

 which subsequent experience has not confirmed. But the most 

 important, artificial as they are in some respects, are yet by far 

 the best that have been proposed. And if the whole number be 

 t]ms reduced to seven, or perhaps eight, it wiU be found that the 

 four largest of them have a close parallel among Loganiacete^ as 

 may be seen by the following comparative statement : 



" 



Bttbiace^. 



S 





i 



Seeds 



winged . . . 



Flowers numerous on 

 globular receptacles 



Flowers distinct 



LOGAIJIACE-S: 



Seeds not 

 winged . . . 



Fruit capsular 



Fruit succulent, inde- 



hiscent 





Fruit succulent 



Nauclcefe. 



Cinclionerc. 

 IledyotidecD 



Gavdenieac. 



Coffeese. 



Antoniese. 

 Euloganiea? 



o 



8 



6 •* 



Fruit dry 



Stipules interpctiolar, 

 not foliaceous 



Stipides similar to the 

 leaves, forming ai 

 ' whorl with them . . . 



Sperm acocese 



Fagrscece. 

 Gcertnerieas 



K . 



— t^ 



SteUatffi 



% 



-H 



xi 



t *. 



< 



s 



V 



. ' 



'T-. 



-^-' >>. 



'"s 



AT" 



- ■ ^' h 





