428 APPENDIX. No. V. 



family in Professor Smith's herbarium, three should form genera hitherto 

 unnoticed. 



Tlie first of these new genera is a shrub, in several of its characters related 

 to Spaimannia, like which, it has the greater part of its outer stamina destitute 

 of anthera? : i;i the structure of its fruit, however, it approaches more nearly 

 to Corchorus. 



The second genus also agrees with Corchorus in its fruit ; but differs from 

 it sufficiently in the form and dehiscence of the antherae ; as well as in the short 

 pedicellus, like tliat of Grewia, elevating its stamina and pistiilum. 



Tlie third, of which the specimens are in fruit only, fortunately, however, 

 accompanied by the persistent flower, is remarkable in having a calyx of tlu"ee 

 lobes, while its corolla consists of five petals ; the stamina are in indefinite 

 number ; and the fruit is composed of five single-seeded capsules, connected 

 only at tlie base. In the want of symmetry or proportion between the divisions 

 of its calyx and corolla, it resembles the ChlenacecE of M. du Petit Thouai-s,* 

 as well as Oncoba of Forskael and Ventenatia of M. de Beauvois.f The exist- 

 ence of this new genus decidedly belonging to Tiliacese, and having a consi- 

 derable resemblance to Ventenatia, whose place in the system is, indeed, not 

 yet determined, but of which the habit is nearly that of Rhodolaena, seems in 

 some degi-ee to confirm M. du Petit Thouars's opinion of the near relation of 

 Chlenacca; to Tiliaceae ; though M. de Jussieu, in placing it between Ebenaceas 

 and Rhodoracea?,! appears to take a very different view of its affinities. 



MALVACEjE. Of this family 18 species were observed on the banks of 

 the Congo. It forms, therefore, about one thirty-fourth part of the Phasno- 

 gamous plants of the collection ; which is somewhat greater than the equinoc- 

 tial proportion of the order, as stated in Baron Himiboldt''s dissertation,^ but 

 nearly agrees with that of India, according to Dr. Roxburgh's unpubhshed 

 Flora Indica. 



The greater part of the Malvaceae of the collection, belong to Sida and 

 Hihiscns ; and certain species of both these genera are common to India and 

 America. Urena aviericana and Malachra radiateu, hitherto supposed to be 



* Hist des ri-gel. dcs Jsles de I'Jfriqiie, p. 46. t Flore d'Oware, \,p. 29, t. IT. 



% Mirbel Elem. de Physiol, f'eg. et de Bot. 2, p. 855. 



^ Prolesomena, p. xviii. De Dislrib. Geogr. Plant, p. 43. 



