11111(1] XXX. RUTACE.E. Ill 



large trees with a magnificent habit, which dominate the sur- 

 rounding vegetation with their beautiful crowns of glossy foliage, 

 and which bear some resemblance to our ash trees ; the trunks of 

 these large trees are almost always armed with sharply pointed 

 tubercles ; and the timber of all the species is of excellent quality 

 and is not unfrequently penetrated with a yellow colour. They 

 are more abundant in the hilly region than in the highlands, where 

 they diminish rapidly in number both of species and individuals. 



The tribe Aurantiefe is sparingly represented in the indigenous 

 flora of Angola ; two or three species of the genus Clausena, arbo- 

 rescent shrubs, with pinnate leaves, white or pale flowers and 

 aromatic pea-shaped fruits, were met with in the hilly and high- 

 land regions. The Lemon is occasionally found ^vild in the midst 

 of woods, but only in stations Avhere there have been villages in 

 former times. Oranges and lemons are commonly cultivated 

 throughout the province ; less frequently the Sweet Lime and the 

 Citron, which, however, are occasionally seen in gardens. S^^eaking 

 generally, the cultivation of these very valuable trees in this 

 country as yet leaves much to be desired, since the successive im- 

 provement of the different varieties by means of grafting is almost 

 unknown. (See Welwitsch, Apontamentos, pp. 560-61, 565-66.) 



1. RUTA L.; Benth. & Hook. f. Gen. PI. i. p. 286. 



1. R. graveolens L. Sp. PI. edit. 1, p. 383 (1753); Oliv. Fl. 

 Trop. Afr. i. p. 304. 



MossAMEDES. — An undershrub, 1^ to 2 ft. high, almost a little shrub. 

 Formerly cultivated, but wild or apparently so, among garden-crops 

 and along the stony margins of cultivated fields ; fl. and fr. Sept. 1859 ; 

 also in rough rocky situations in the neighbourhood of gardens, in July 

 1859. No. 1620. 



2. ZANTHOXYLUM L. ; Benth. & Hook. f. Gen. PI. i. p. 297. 



1. Z. macrophyllum Oliv. Fl. Trop. Afr. i. p. 304. 



GoLUNGO Alto. — Trunk 9 to 12 in. in diam. at the base ; crown 

 palm-shaped, very elegant ; trunk, Ijranches, and rachis and petiole of 

 the leaves armed with hard and acute spines ; flowers (sub-)terminal, 

 thyrsoid, greenish. In Sobado de Bumba by rivulets ; with flower- 

 buds in Oct., immature fr. Jan. 185G. No. 4557- Coll. Carp. 302. 

 Trunk 18 to 24 in. in diam. at the base, tuberculate-spinous, straight, 

 branchless below, above with erect-spreading densely spinous branches, 

 crowned with palm-like head at the apex ; flowers (sub-)terminal, 

 paniculate, yellowish-greenish. Native name " Paco b/do." Not un- 

 common in dampish wooded situations in Sobato Bumba ; fl. March 

 1856. No. 4564. A tree, 30 to 60 or even 80 ft. high ; trunk straight, 

 12 to 18 in. in diam. and probably becoming thicker, from the base up 

 to the apex bristling with prickles. Native name "Paco ballo." In 

 the dense more elevated primitive forests of Sobato de Bango Aqui- 

 tamba and Quilombo ; Mata de Quisuculo, with foliage but without 

 flowers, Sept. 1855. Nos. 4565, 4568. 



Island of St. Thomas. — Leaves 9-10-jugate. Name "Marapiao." 

 Without flowers or fruit. No. 4563. 



The above flve Nos. apparently belong to the species as quoted. 

 The name " Paco ballo," one of the most valuable woods for building 



