Zizyphus] xxxix. rhamnejE. 151 



Xella above Bumbo, at Bruco ; sparingly in fl. and with young fr. 

 Oct. 1859. No. 4610. A tree, 6 to 8 ft. high, with a very loose crown, 

 vaguely and divaricately branched ; flowers yellowish. At the margins 

 of primitive woods between Bumbo and Serra da Xella ; fl. Oct. 1859. 

 No. 4611. 



Huilla. — An arborescent shrub, with quite patent branches. In 

 wooded stony places near Mumpulla, at an elevation of 4000 ft., 

 sparingly ; fl. Oct. 1859. No. 4612. 



Cape de Verde Islands. — A small tree. In sandy and rocky 

 maritime places near Porto Praza, in the island of St. Jago, frequent ; 

 without either fl. or fr. Jan. 1861. A small-leaved form. No. 4607. 



2. Z. mucronatus Willd. Enum. PI. p. 251 (1809) ; Hemsl. in 

 OKv. Fl. Trop. Afr. i. p. 380 (muoronata). 



Golungo Alto. — A tree of 15 to 20 ft. Road to Sobatode Bumba ; 

 without fl. or fr. April 1856. No. 6710. Between Cambondo and the 

 Luinha, June 1855. Berries reddish. Coll. Carp. 334. 



Pungo Andongo. — A small tree, 8 ft. high. In wooded rocky places 

 at the stream Canandua ; without fl. or fr. April 1857. No. 4613. 



Huilla. — A much-branched tree, 20 ft. high ; branchlets sarmentose- 

 flexuose, rather nodding. In wooded stony places around Mumpulla, 

 without fl. or fr., and near Lopollo with unripe fr. Dec. 1859, rather 

 rare. No. 1266. 



2. HELIN US E. Mey. ; Benth. & Hook. f. Gen. PI. i. p. 385. 



1. H. ovatus E. Mey. Zwei Pflanz. Doc. Drege, pp. 142, 144, 

 145, 190 (1843) (ovata); Hemsl. in Oliv. Fl. Trop. Afr. i. p. 384. 



H. scandens Radlk. in Abh. Nat. Ver. Bremen viii. p. 389 

 (1883), non A. Rich. Gouania integrifolia Lam. Encyl. Meth. iii. 

 p. 5 (1789). H. integrifolius O. Kuntze, Eev. Gen. PI. i. p. 120. 



Golungo Alto. — A perennial herb or undershrub, with watery sap ; 

 flowers white or greenish ; petals spreading at the time of flowering ; 

 anthers whitish ; style-lobes included or exserted. Not uncommon, by 

 thickets along the banks of the river Delamboa (also at the river 

 Luinha and among the mountains in the district of Cazengo) ; with 

 fl. and unripe fr. end of May 1856. No. 4614. Near Trombeta, Cam- 

 bondo and Sange, rarely in fl. May 1855 ; Zengas do Zenza, fl. and fr. 

 Oct. 1855. No. 46146. In grassy thickets near Sange ; fr. August 

 1857. Coll. Carp. 335. 



XL. AMPELIDE^]. 



The Ampelidese take a prominent place among the manifold 

 groups of plants which exercise more or less influence on the 

 physiognomy of the vegetation in West Tropical Africa, and also 

 become interesting to the phyto-geographer because the numerous 

 species of Cissus and allied genera pretty clearly characterise, by 

 their various habits and modes of life, the three great plant-regions 

 into which Welwitsch divided the districts of Angola and Ben- 

 guella. The number of species found by Welwitsch amounts to 

 about forty, including two species of Leea ; they range from the 

 shores of the Atlantic Ocean up to the richly-wooded highlands of 

 the interior, in a direction from west to east along a slanting 



