464 APPENDIX. No. V. 



These are Cycadeae, Piperaceae, Begoniaceae, Laurinse (Cassytha excepted,) 

 Passifloreae, Myrsineag, MagnoliacesE, Guttiferae, Hesperideae, Cedreleas, and 

 Meliaceae. 



CycadecE, although not found in equinoctial Africa, exist at the Cape of 

 Good Hope and in Madagascai*. 



Piperacece, as has been already remarked by Baron Humboldt,* are very 

 rare in equinoctial Africa ; and indeed only two species have hitherto been 

 published as belonging to the west coast : the first, supposed to be Piper Cubeba, 

 and certainly very nearly related to it, is noticed by Clusius;*!- the second is 

 imperfectly described by Adanson in his account of Senegal. A third species, 

 of Piper, however, occurs in Sir Joseph Banks's herbarium, from SieiTa 

 Leone : and we know that at least one species of this genus and several of 

 Peperomia, exist at the Cape of Good Hope. 



The extensive genus Begonia, which it is perhaps expedient to divide, may 

 be considered as forming a natural order, whose place, however, among the 

 Dicotyledonous families, is not satisfactorily determined. Of BegoniacecjE,X 

 no species has yet been observed on the continent of Africa, though several 

 have been found in INIadagascar and the Isles of France and Bourbon, and one 

 in the Island of Johanna. 



■ No genus of Laurinw, is known to exist in any part of the continent of 

 Africa, except the pai'adoxical Cassytha, of which the only species in the 

 Congo collection can hardly be distinguished from that of the West Indies, or 

 from C. pubescens of New Holland. The absence of Laurinae on the continent 

 of Africa is more remarkable, as several species of Laurus have been found 

 both in Tenerift'e and Madeira, and certain other genera belonging to this 

 family exist in Madagascar and in the Isles of France and Bourbon. 



PassiJ/orcce. A few remarkable plants of this order have been observed 

 on the different parts of the west coast of Africa, especially Modecca of the 

 Hortus Malabaricus and Smeathmania, an unpublished genus already men- 

 tioned in treating of Homalinae. 



Myrsinecc. No species of any division of this order, has been met 

 ivitli in equinoctial Africa, though several of tlie first section, or Myrsineae, 



* Nov. Gen. el Sp. PI Orb. Nov. 1, p. 60. 



t Piper ex Guinea, Clus. exot.p. 1S4, who considers it as not different from the Piper 

 caudatuni, figured on the same page, and which is no doubt Piper Cubeba of the Malayan 

 Archipelago. + Bonpland Malmais. 151. 



