APPENDIX. No. Y. 447 



But it is to be observed that this family is composed of two divisions, having 

 very diflFerent relations to climate ; the first, with opposite, or more rarely 

 verticillate leaves and intermediate stipules, to which, though constituting the 

 great mass of the order, the name RubiaceiE cannot be applied, being chiefly 

 equinoctial ; while the second, or Stellatw, having verticillate or very rarely 

 opposite leaves, but in no case intermediate stipules, has its maximum in the 

 temperate zones, and is hardly found within the tropics, unless at great heights. 



Hence perhaps we are to look for the minimum in number of species oi" the 

 whole order, not in the frigid zone, but, at least in certain situations, a few 

 degrees only beyond the tropics. 



In conformity to this statement, M. Delile's valuable catalogue of the plants 

 of Egypt * includes no incUgenous species of the equinoctial division of the 

 order, and only five of Stellatce, or hardly the one hundred and sixtieth part of 

 die Phasnogamous plants. In M. Desfontaines' Flora Atlantica^ Rubiacea?, con- 

 sisting of fifteen Stellatas and only one species of the equinoctial division, form 

 less than one ninetieth part of the Phasnogamous plants, a proportion somewhat 

 inferior to that existing in Lapland. 



In Professor Thunberg's Flora of the Cape of Good Hope, where Rubiacese 

 are to Phasnogamous plants, as about one to one hundred and fifty, the order is 

 differently constituted; the equinoctial division, by the addition of Jntho- 

 spefmum, a genus peculiar to southern Africa, somewhat exceeding Steiratae 

 in number. And in New Holland, in the same parallel of latitude, the relative 

 number of SteOatae is still smaller, from the existence of OperculaTia, a genus 

 found only in that part of the world, and by the addition of which the proportion 

 of the whole order to the Phanogamous plants is there considerably increased. 



More than hidf the Rubiacea; from Congo belong to well known genera, 

 chiefly to Grardenia, Psychotria, Morinda, Hedyolis, and Spermacoce. 



Of the remaining part of the order, several form new genera. 



T\ie first of these is nearly related to Gardenia, which itself seems to require 

 subdivision. 



The second is intermediate between Rondeletia and Danais, and probably 

 includes Rondeletia febrifuga of Afzelius.-f- 



* Flor. Egypt. Illuslr. in Descript. de VEgyple, Hist. Nat. v. 2. p. 49. 



+ In Herb. Banks. This is the " New sort of Peruvian Bark " mentioned in his Report, 

 p. 174: which is probably not diffefent from the Bellenda or African Bark of Winter- 

 bottom's Account of Sierra Leone, vol. 2, p. 243. 



