110 XXIX. GERANiACE^. \Biophyti(.m 



2. B. abyssinicum Steud. in Hb. Schiinp. Abyss, ii. n. 1206; 

 A. Rich. Fl. Abyss, i. p. 122 (1847). 



Oxalis ahyssinica Oliv. Fl. Trop. Afr. i. p. 297. 



PuNGO Andongo. — A very slender erect annual herb, stem 3 to 12 in. 

 high, reddish, towards the apex somewhat thickened and bearing an 

 elegant palm-like crown ; leaves remarkably sensitive ; leaflets in 4 to 

 10 pairs, veiny on both surfaces, glaucescent beneath ; peduncles very 

 slender, about as long as the leaves ; pedicels umbellate, almost capil- 

 lary, in flower ^-^ to ^ in. long, in fruit ^ to i in. long ; flowers yellow, 

 small ; sepals 3-nerved, shorter than the capsule. Rather rare, on the 

 lower exposed shortly grassy slopes of the mountains of Pungo Andongo, 

 along the stream Casalale, between the fortress and Caghuy ; fl. middle 

 of Jan. and Feb. and near Catete ; fr. April 1857. No. 1613. 



Welwitsch, Apont. p. 567, under n. 162, refers to this plant by the 

 name of Biophytum seusitivum DC. 



6. IMPATIENS L. ; Benth. & Hook. f. Gen. PI. i. p. 277. 



1. I. capensis Thunb. Prodr. PL Cap. p. 41 (1794); Hook. f. in 

 Oliv. Fl. Trop. Afr. i. p. 300. 



Pungo Andongo. — An annual erect tender slender herb, 1 to lA ft. 

 high ; rhizome creeping ; stem more or less decumbent at the base or 

 even rooting, cylindrical, very succulent, purplish ; leaves membranous, 

 rather flaccid, somewhat fleshy, bright green, crenate-serrate, with a 

 long obtuse acumen at the apex, on long slender petioles ; flowers rose- 

 coloured, rather small, quickly marcescent ; peduncles capillary ; capsule 

 oblong, rather curved, attenuate at the ends, very bluntly 5-angled ; 

 seeds obovate, villous, rather compressed, whitish. Rather rare, in 

 shaded rocky places within the stronghold of Pungo Andongo and in 

 Serra das Pedras de Guinga, fl. and fr. Nov. and Dec. 1856 and March 

 1857. No. 1618. 



2. I. Kirkii Hook. f. in Oliv. Fl. Trop. Afr. i. p. 300. 

 Var. (3, Hook, f., I.e., p. 301, hypoleuca Welw. ms. (sp.), 

 Ambaca. — Perennial, with the habit of Imjiat/ens latifoUa L. ; stem 



decumbent, rooting at the nodes ; ascending portion 1 ft. high, suberect, 

 cylindrical, turning red, thinly scattered with subscarious hau's ; leaves 

 alternate, broadly lanceolate, 2i to 3 in. long, somewhat acuminate or 

 apiculate, abruptly attenuate at the base, very bright green above, 

 glaucescent-whitish beneath, serrate, the serratures sometimes extend- 

 ing to the petiole ; petioles of the lower leaves J in. long, of the upper 

 leaves gradually shorter ; flowers very bright rose-purple, rather large ; 

 peduncles axillary, solitary or 2 together, 2 to 3 in. long, the fruiting 

 ones spreading or even very patent ; spur longer than the rest of the 

 flower or equalling it ; capsule linear-oblong or elliptical. Sparingly 

 at the spongy margins of streams, about Izanga ; fl. Oct. 1856. No. 1616. 



Cazen-go. — At the spongy banks of the small lake Lagoa do Moam- 

 bege near Dalatando ; fl. June 1855. No. 1617. 



Occurs also in the district of Golungo Alto, according to Welwitsch, 

 Apont. p. 567, under n. 163. 



XXX. RUTACE^. 



With the exception of Ruta graveolens L., which is cultivated 

 and also nearly wild in the district of Mossamedes, this natural 

 order in Angola is composed almost entirely of trees, and often of 



