406 LXIII, CUCURBITACES. [Gerrardanthus 
the semicircular connective and furnished with an empty subulate 
appendage ; anthers 1-celled, dehiscing longitudinally; connective 
externally marginal ; ovary rudimentary, scarcely conspicuous, repre- 
sented only by a central style. In thickets at the skirts of the forest 
of Mata de Pungo, sporadic; male fl. April 1857. No. 861. 
LXIV. BEGONIACEZ. 
A species of the section Mezierea of Begonia grows at the banks 
of streams in the dense forests of the mountainous region of 
Angola, and a second species of the genus belonging to the section 
Rostrobegonia is met with in moist and shady hollows within the 
fortress lines of Pungo Andongo. Welwitsch’s discovery of these 
plants placed beyond doubt the existence of the family in tropical 
Africa, See Welwitsch in Journ. Linn. Soe. iii. pp. 151, 154 
(1859), and Apont. p. 556, n. 130. 
1. BEGONIA Tourn., L.; Benth. & Hook. f. Gen. Pl. i. p. 841. 
1. B. oxyloba Welw. ex Hook. f. in Oliv. Fl. Trop. Afr. ii. p. 
573; Warb. in Engl. Bot. Jahrb. xxii. p. 38 (1895). 
GoLuneo ALTo.—Stems cylindrical, rosy, brittle, 1 to 2 ft. high, 
ascending from the thick half-subterranean rootstock, which is filled 
with a watery juice ; flowers from rosy to reddish ; perianth-segments 
whitish-rosy, reniform-orbicular, pervaded with longitudinal purplish 
nerves running from the base towards the margin ; anthers yellow ; 
ovary conical-ellipsoidal, obtusely trigonous, marked on the sides and 
angles with a purplish line ; styles 3, short, cylindrical, soon divided 
into yellow, very viscid, hippocrepiform-bifurcate stigmas. In primitive 
forests along streams in Mata de Quisucflo in Sobato de Bango, in 
very shady places, sparingly; fl. beginning of Jan. ; very scarce fr. 
March 1856; without fl. 8 Sept. 1855 and May 1856 ; fl. and fr. end 
of May 1856. No. 875. 
2. B. rostrata Welw. ex Hook. f., dc. p. 578, 
Diploclinium (sp.), Welw. in Journ. Linn. Soc. iii. p. 154 (1859), 
and Apont. p. 556 sub n. 130 (Diplodinium). 
Punco Anponco.—An annual tender herb, 1 to 14 ft. high ; stem 
erect, cylindrical, succulent, smooth, blood-red or sometimes purple, 
nodose-jointed ; leaves highly glossy, bright-green, and scattered with 
long thin white hairs above, paler beneath ; petiole terete, blood-red, 
girt at the insertion of the leaf-blade with long approximated cilia; 
flowers small, pale-rosy ; perianth-segments more or less ovate, those 
of the male flowers nearly always larger than those of the female, 
usually 5 (4 regular and the fifth much smaller than the four) in the 
female flower ; filaments not very short, free, abruptly terminating in 
the clavate connective, to the opposite sides of which the cells of the 
anther longitudinally adhere but do not reach either its top or bottom ; 
pollen whitish ; stigmas velvety, horseshoe-shaped or lyrate ; capsule 
unequally 3-winged, two wings equal, the third acutely narrowed into 
a long flattened beak. In the clefts and caverns of the most elevated 
rocks along streams, chiefly in shady damp situations, abundant, but 
restricted to particular spots ; at Tunda-Quilombo within the fortress : 
fl. Feb. 1857; fl. and young fr. March and April 1857; fr. Oct. and 
