164 BOTANY OF CONGO. 



the equinoctial relation, but also, to a certain degree, in the 

 477] more extensive genera of which several of these families 

 consist : and there are even about forty species common to 

 these distant regions. 



To the vegetation of Equinoctial America it has certainly 

 much less affinity. Several genera, hovs^ever, vi'hich have 

 not yet been observed in India or Nevf Holland, are common 

 to this part of Africa and America ■} and there are upwards 

 of thirty species in the Congo herbarium, which are also 

 natives of the opposite coasts of Brazil and Guiana. 



As the identity of species, especially of the Dicotyle- 

 donous division, common to equinoctial America and other 

 intratropical countries, has often been questioned, I have 

 subjoined two lists of plants included in the Congo herba- 

 rium, of which the first consists of such species as are 

 common to America and India : and the second, of such as 

 are found in America only. 



I have given also a third list, of species common to 

 Congo and India, or its Islands, but which have not been 

 observed in America. 



And a fourth is added, consisting of doubtful plants, to 

 which I have, in the mean time, applied the names of those 

 species they most nearly resemble, and to which they may 

 really belong, without, however, considering their identity 

 as determined. 



I. List of Plants common to Equinoctial Africa, America, 



and Asia. 



Gleichenia Hermaimi, Prodr. Flor. ") Fuirena umbellata, L.fil. 



Nov. Boll. > Pistia Stratiotes, ij. 



Merteusia dichotoma, Willd. } Boerhaavia mutabilis, Prodr. Flor. 

 Agrostis Virginica, L. Nov. Moll. 



Cyperus articulatus, L. 1 -, IpomcEa pes-caprse, Noh. 



— niloticus, Vahl. J ' ^' Convolvoulus pes-oaprse, L. 1 , 

 Lipocarplia argentea, Noh. 1 — brasiliensis, L. j ^ *-^" 



Hypselyptum argenteum, Vahl. J Iporaoea pentaphylla, Jacqw. 



Eleocharis capitata, Prodr. Fl. N. Holl. Scoparia dulcis, L. 



' Namely, Elffiis, Jacqu. B-ivina, L. Telanthera, Nob. (Alternantheras pen- 

 taudras). Alcliornea, &>. Bleohum, Prodr. Flor. Nov. Eoll. (Blechi sp. Jasi.) 

 Sohwenckia, i. Hyptis, Jae^a. Vandellia, Z. Annona, i. Banisteria, iVbi. 

 (Banisteriae sp. L.) Paullinia, Jnss. (Paulliniae sp. i.) Vismia, Ruiz, et Pav. 

 Conocarpus, L. Leguotis, Sw. (Cassipouvea, Aubl.) Chailletia, Decand. 



