106 XXVIII, ZYGOPHYLLE^. [Tribulus 



the river Bero and in neighbouring gravelly places, near Cavalheiros, 

 fl. and fr. July 1859. No. 1580. Very sparingly in gravelly places 

 exposed to the inundations of the river Bero, at Boca do Bero, fl. and 

 fr. August 1859. No. 1581. 



Cape de Verde Islands.— A little shrub, branched from the base, 

 with yellowish wood. In rocky maritime places near Villa de Praia in 

 the island of St. Jago, fl. and fr. Jan. 1861. No. 1582 and Coll. 

 Carp. 300. 



These specimens of Welwitsch confirm Oliver's treatment of them as 

 all belonging to one variable species, and further make it difficult to 

 keep up the variety (3. cistoides without at the same time admitting 

 other varieties. 



2. ZYGOPHYLLUM L. ; Benth. & Hook. f. Gen. PI. i. p. 266. 



1. Z. simplex L. Mant. PI. (i.) p. 68 (1767); Welw. in Journ. 

 Linn. Soc. v. p. 183 (1861); Oliv. Fl. Trop. Afr. i. p. 285. 



Z. 2^ortidacoides Forsk. Fl. ^gypt.-Arab. p. Isvi. n. 230, p. cxi. 

 n. 279, p. 88 n. 67 (1775). Z. stellulatum Chr. Sm. in Tuck. 

 Congo, p. 250 (name only, 1818). 



Bexguella.- — Disk patelliform, a little concave, rather thick ; mar- 

 gin stellately dentate. A densely bushy grass-green shrub, 1 to \h ft. 

 high, with yellow flowers and cylindrical rather obtuse leaves. Very 

 common in sandy maritime places, especially in those flooded by rain, 

 Bahia dos Elefantes from the city of Benguella as far as Cabo Negro ; 

 fl. and fr. June and July 1859. No. 1568. An erect dichotomously 

 branched annual herb, scarcely a span high, with linear fleshy almost 

 terete leaves. In rather shady sandy-earthy spots behind the city of 

 Benguella, in company with an Eragrostis ; fl. and fr. end of June 1859. 

 No. 1571. 



Mossamedes. — Prostrate after the fashion of Povtuluca oleracec, 

 with cylindrical bright orange-coloured stems. Very common in dry 

 sandy hilly maritime places among species of leafless Eupliorhia and of 

 Sarcosteiniua near the town of Mossamedes ; fl. and fr. June and July 

 1859. No. 1569. An erect form ; whole plant rather fleshy ; stem 

 corymbosely branched from the base. Sparingly in dry sands between 

 Mossamedes and Cavalheiros, in company with Vogelia africana Lam. 

 (Welw. Herb. 519) ; fl. and iv. July 1859. No. 1570. Stems several 

 from the same rootstock, obliquely erect, somewhat flexuous and woody, 

 pale reddish ; leaves half the length of those in the prostrate form. 

 Occasionally in sandy hollows near the sea-coast, at Cazimba, between 

 Mossamedes and Cabo Negro, in company with Merremin midttsecta 

 Hallier (Welw. Herb. 6112) ; fl. and fr. beginning of Sept. 1859; a 

 small-leaved variety. No. 1573. In damp sandy places along the 

 banks of the river Bero, near the town of Mossamedes ; young plants 

 not yet in flower, with long narrowly linear fleshy leaves ; probably 

 belonging to this species, August 1859. No. 1572. 



Cape de Verde Islands. — Occasional, in rocky maritime places, in 

 the island of St. Jago, near Villa da Praia ; fl. and fr. Jan. 1861 ; a 

 small-leaved variety. No. 1574. 



2. Z. orbiculatum Welw. ex Oliv., I.e., p. 285 ; Welw. Sort. p. 19. 

 Zygophyllum (sp.), Welw. in Journ. Linn. Soc. v. p. 183 (1861). 

 A fleshy shrvib, 1 to 2| ft. high ; stems numerous from a widely 



creeping rootstock, oblique or nodding, woody at the base, cylin- 

 drical, dichotomously branched; branches Jointed, gradually 



