ARNOTT ON SOUTH'aFRICAN PLANTS. [153 



Schmidelia, Lin., a genus which has not hitherto been recog- 

 nised as South African. In the two first, and in the last of 

 these, the style is bifid, and the ovary 2-celled ; in the two 

 others I find only stamens. In R. melanocarpa, tlie carpels 

 are subglobose, one of them usually abortive ; the petals 

 are furnished with a scale. R. leucocarpa appears allied to 

 Schmidelia -Africana ; the carpels are usually solitary by 

 abortion, obovate, and nearly horizontal. In R. erosa, the 

 petals are furnished with a liairy scale, and the filaments are 

 hairy. Whether this and R. undulata, be the species in- 

 tended by Thunberg, it is almost impossible to ascertain 

 from the short characters given. 



S. The other species of Rhus in Drege's catalogue all 

 belong to that genus. Of these R. tomentosa, is R. pluke- 

 netiana, E. and Z. ; R. mucronata does not seem "to be 

 Thunberg's plant, but agrees with Burmann's Afr. t. 91, /. 

 2, which is the type of R. Burmanni, DC. ; but it is scarcely 

 R. Burmanni, E. and Z., since these authors refer to the 

 Un. R. n. 683, which is quite a different species ; it may, how- 

 ever, be R. pliccefolia. E. and Z. Rhus n. 6793, b. seems to 

 be R. incisa, L. ; R. angustifolia (but not of Linnaeus) is 

 R. fastigiata, E. and Z. ; R. pallida, seems to be R.denudata, 

 Licht. ; Rhus n. 116, is Rh. lucida, Lin. 



9. Although not in Drege's collection, I may here notice 

 Boscia imdulata, Thunb., or Asaphes undidata^ DC, a very 

 little known genus. All authors describe it with three styles 

 and stigmata, and a four-celled fruit, a contradiction which 

 has not escaped M. Adrien de Jussieu, in his memoirs on 

 the RutacecE. But Thunberg may have actually described 

 what he saw ; the flowers are unisexual, and in the few which I 

 have myself opened, I have found only three styles, while the 

 fruit which I have seen is generally 4-celled, but this last is 

 occasionally 3-celled, whence the normal state is, I have no 

 doubt, to have four styles in the male flower, and four cells 

 to the fruit. The stigma, which remains attached like a 

 kittle cup to the top of the fruit, is perfectly different from 



Vol. III.— No. 19. X 



