32 
Transactions of the Royal Society of South Africa. 
ARISTOLOCHIALES. 
Aristolochiaceae. 
One species of Aristolochia L. is found in the Northern Transvaal. 
Rafflesiaeeae. 
The occurrence of Cytinus dioicus Juss. at Port Elizabeth marks the 
eastern limit of the genus in the coast districts of South Africa. Westwards 
it extends to Saldanha Bay. According to Marloth it extends eastwards to 
Kaffraria, but no locality beyond that mentioned is known to me. 
Hydnoraceae. 
The wide distribution of Hydnora africana Thunb. which is found both 
west and east (as far as Kingwilliamstown) of Uitenhage, makes it practically 
certain that it will also be found in our districts, though hitherto unrecorded. 
Hydnora is perhaps unique amongst South African genera, extending so far 
in the southern coast belt by passing through the western region into the 
Tropics. 
POLYGONALES. 
Polygonaceae. 
The genus Oxygomim Burch. is absent from the Uit. and P. E. divs., but 
(leaving out a Stellenbosch record in the ' Flora Capensis ' which I consider 
as doubtful) it is only found in the Kalahari region, Natal and G-reat 
Namaqualand. The three other South African genera are generally 
distributed. 
CENTROSPERMAE. 
Chenopodiaceae. 
The genera Boubieva Moquin, Kochia Roth., and Salsola L. are not 
recorded from the Uit. and P. E. divs. The first is only represented in 
South Africa by an introduced weed ; the second is only found in the 
Karroo region ; the third is found also in the Karroo region, but extends to 
the Kalahari region, and one species was found by Zeyher at Sidbury, near 
Gi-rahamstown. The other South African genera have fairly general distri- 
bution, and are found in the Uit. and P. E. divs. 
Amarantaceae. 
Very few species of this order are found west of Uitenhage in the coast 
districts, while they increase in number towards the East and in the northern 
districts of Cape Colony. Gyathula Lour., Pupalia Juss., Achyropsis Hook, f 
Alter7ianthera'Forsk., and Gomphrena L. are not recorded west of Uitenhage, 
but as they are weeds they may have been neglected by collectors. 
Nyctaginaceae. 
Extending from the Tropics into South Africa, only Phaeoptilum Eadlk.^ 
