118 XXX. RUTACEiE. [Clauseua 



pedicels ranging up to | in. long ; jDetals 4 (in the female flowers 

 occasionally 5 or very rarely 6), oblong or oval-oblong, obtuse, 

 concave, imbricate in aestivation, quickly deciduous, rather erect 

 in the male flower but patent in the female flower. In the male 

 flower stamens 8 (or 7), equal, glabrous, \ in. long, free ; filaments 

 flattened, somewhat tapering towards the apex ; anthers cordate- 

 oblong, not apiculate, 2-celled, of a deep yellow colour, longi- 

 tudinally dehiscing ; ovary rudimentary, glabrous, prominent. 

 In the female flowers stamens wholly wanting ; ovary subsessile, 

 glabrous, surrounded at the base by the adnate annular sufliciently 

 high disk, sub-spherical, obtusely 4-5-angled, dotted all over, 4-5- 

 celled ; ovules pendulous, solitary ? in each cell ; style central, 

 thick, short, surrounded by a rounded papillose-viscid obtusely 

 4-5-angled stigma. Fruit baccate, green, glandular-punctate, 

 resinous, glabrous, depresso-globose, but somewhat 2-5-furrowed 

 longitudinally, ^ to ^ in. in diam., marked with numerous impressed 

 dots, with 2 or more cells ; pedicels ranging up to | in. long. 



GoLUNGO Alto. — In thickets in hilly situations, at the right bank of 

 the river Cuango, near the road leading to Ambaca, rather rare, with 

 male flowers 31 Oct. 1855. No. 1315. In the same locality, 300 paces 

 from the trees with male flowers, with female flowers April 1854 and 

 with immature fruit Oct. 1855. Nos. 1315&, 1316. 



The dioecious character of this species is exceptional, not only in the 

 genus, but also in the tribe Aurantiese, in which it is placed. 



Citron, Citrus medica L. ; var. acida (Roxb.). GoLUNGO Alto. — 

 Established, perhaps formerly introduced and cultivated, or possibly 

 wild ; in secondary thickets, at the entrance to Mata de Quisuculo in 

 Sobato de Bango ; fl. Sept. 1855 and April 1856. Nos. 1319, 1319^^. 



Orange, C. Aurant'nim L. Golungo Alto. — Frequently cultivated 

 throughout the district ; near Undelle, fl. Feb. 1855. No. 1318. A 

 specimen, without flowers or fruits, from the Island of St. Thomas, 

 where the plant is called " Laranja M ucamba," may be mentioned here. 

 No. 6762. 



XXXI. SIMARUBE^. 

 1. HANNOA Planch.; Benth. & Hook. f. Gen. PL i. p. 308. 



1. H. undulata Planch, in Hook. Lond. Journ. Bot. v. p. 567 

 (1846) ; OHv. Fl. Trop. Afr. i. p. 309. 



Simaba ? imdulata Guill. &, Perr. Fl. Senegamb. p. 136, t. 34 

 (1832). 



Golungo Alto. — A glabrous evergreen tree, 12 to 30 ft. high, with 

 widely dilated leafy crown and spreading branches, or in young trees 

 6 ft. high with few short erect-patent branches ; leaves impari-pinnate ; 

 common petiole deeply channelled towards the base ; leaflets in 2 to 14 

 pairs (besides the terminal one), opposite (or occasionally alternate), 

 coriaceous and hard or on the radical shoots from the stumps of old 

 trees chartaceous, deep green and somewhat glaucous-shining above, 

 beneath much paler and glaucescent, in the dry state turning ferru- 

 ginous, elliptic-obovate or obcordate, 2 to 4 in. long or on the radical 

 shoots more oblong cuspidate and larger ; petiolules (except the terminal 

 ones) not exceeding | in., at length usually turned towards one side of 



