328 
I have not seen a single fruiting specimen of A. heteracantha 
and good fruiting material is much desired in order to ascertain 
whether it is more than a mere form or condition of A. litakunensis, 
ane 
Acacia karroo, Hayne, Gewaechse x, t. 33 (1827); 
Ai Mento, tien in Fl. Cap. ii. 281 (1861- 62), non Willd. ; 
capensis, Burch., Travels i. 195 (name only) 189 (figure) 
2). 
vaya ‘thorn, Doorn-boom, Zoet-doorn, §Wittedoorn, 
pe NamME: um-Nga 
South Arrica. Cape Province: Central, Eastern and 
South-western Regions. “ Karroo,” Lichtenstein, (type); Rich- 
mond Div.; Drége! Griqualand West; Burchell 1953-1! 
pei Habe State | ! Transvaal! S. Rhodesia : Salisbury, Eyles 
1908 ! 
All the Natal material referred to A. horrida, Willd., which 
I have seen, belongs to A. natalitia, E. Mey., a closely allied 
species which differs in the more numerous pinnae (4-7 pairs), 
narrower and more numerous leaflets, very pubescent rhachis 
and light-coloured (yellowish) bark. 
The most widely-distributed species in South Africa, chiefly 
riparian (forming the outer zone of arborescent vegetation) or 
ound where water occurs near the surface. 
Acacia karro is troublesome to eradicate from agricultural 
land as it coppices freely, forming clumps which flower and fruit 
freely at about 3 ft. high. On the Springbok Flats, Waterberg 
District, Transvaal, I have seen extensive patches of this coppice, 
but only on “black turf” soils, probably where the natives 
had abandoned old “ gardens ”’ for clean new “ braks ” (i.e. 
newly broken veld), which they do as soon as the lands become 
so weedy as to involve much labour for cleaning. Goats and 
other livestock eat the young foliage in early spring, before 
green grass is plentiful. The bush is cut for making dry hedges 
for kraals. The wood makes excellent fuel, but though hard 
and tough is now seldom used for other purposes than the 
roughest of farm uses (Sim); it is subject to attack by a borer, 
but according to Mr. Tudor J. Trevor, if soaked in water for six 
months it is not liable to attack. The gum (Hlaga) has been 
exported by the ton as Cape Gum, and is also used locally in 
confectionery (Sim). The bark is used for domestic tanning ; 
the bast of young branches is tough and is used on farms in 
place of twine or rope. The flowers are very fragrant, hence the 
name ‘ Zoet-deern.’ 
var. transvaalensis, Burtt Davy, comb. nov.; A. horrida, 
var. transvaalensis, Burtt Davy in Kew Bull. 1908, p. 158. 
SoutH Arrica. Endemic to the Transvaal. 
Approaches A. natalitia, E. Mey., but the rhachis and rhachilla 
are less densely pubescent; leaflets less numerous and broader. 
Most of the Transvaal specimens of A. karroo, Hayne, are slightly 
