52 
Transactions of the Royal Society of South Africa. 
Marsdenia E. Br. (E., penetrating westwards to the Cradock and Uit. div.), 
Fockea Endl. (Karroo, E. and N.E., one species in the South as far as 
Mossel Bay), Gymnema E. Br. (E., N. and N.E.), Orthanthera Wright 
(W. and Kalahari region), Tenaris E. Mey. (N.E., one species in Albany, 
Bathurst and at Addo), Biocreuxia DC. (N., N.E. and E., extending west- 
wards to the Karroo and George, but not recorded from our area), 
Ceropegia L. (N., N.E. and E. to the Uit. div. and Eastern Karroo),. 
Brachystelma E. Br. (mainly N.E. and E. to Uit. div., few in Eastern 
Karroo, W. and S.W.), Caralluma E. Br. (W., as far as Malmesbury and 
Ceres, Western Karroo, Kalahari region), Trichocaulon N. E. Br. and 
Hooclia Sweet (W. and Karroo), Tavaresia Welw. (W. and Upper Karroo), 
Huerniopsis N. E. Br. (Griqualand East and Bechuanaland), Duvalia Haw. 
(W. and Karroo to Albany and Uit. div.). 
TUBIFLORAE. 
Convolvulaceae. 
Ipomaea L. is mainly north-eastern and eastern, extending westwards in 
the coast districts, but only few species are found west of the Uit. div., none 
reaching the Cape Peninsula. Convolvulus L. is found in all South African 
regions, but is almost absent in the West, and there is no native species on 
the Cape Peninsula. FalJcia L. is found in the southern coast regions, 
also in the East and North-East. Cuscuta L. has a similar distribution. 
Bichondra Forst. is found in the coast districts from the Cape Peninsula to 
Natal. Then there are four genera only found in the East and North -East, 
of these Breweria E. Br. extends to Queenstown, and lastly one genus is 
only recorded from Natal and Delagoa Bay. 
Hydrophyllaceae. 
The only South African genus, Codon L., is found in the western 
region extending to the Ceres div. 
Borraginaceae. 
The following are found in all regions with the exceptions noted 
Heliotropium L. (absent from south-east coast region), Cynoglossum L. 
(absent from Western Karroo and western region), Echinosjpermum L. 
(absent from West and extreme South-West), Myosotis L. (absent from West, 
including Cape Peninsula), Lithosjpermum L, (absent from Cape Peninsula, 
except an evidently introduced species). Cordia L. is eastern, but extends 
to the Uit. div. and a considerable distance into the Karroo. Tournefortia L. 
has central, western, and northern distribution. Trichodesma E. Br. has 
northern, north-eastern, central, and western distribution, extending to the 
Ceres division. Tysonia Bolus is confined to G-riqualand East. Anchusa L. 
is found in the Karroo (extending to Queenstown and neighbourhood of 
