195 
Sourn Arrica. Transvaal: Heidelberg Dist., Burttholm 
near Vereeniging, about 1450 m., plentiful on dried mud of a 
dam, Burtt-Davy 18,155 in herb. Bolus; Standerton Dist., 
ee about 1690 m., in wet places, Schlechter 3448 in herb. 
ew. 
in “damp alkaline soil” (Hastwood), and in Saskatchewan 
Bourgeau collected it “dans les marais salés de la prairie,”’ 
In Tasmania it is said to be ‘common on the sea-coast near 
high-water mark.” The dam at Burttholm, where my specimens 
were found, is but very slightly ‘‘ brak”’ (i.e., saline) and the 
other plants with which they were there associated are not 
halophytes; the Paardekop habitat is not likely to be saline 
owing to heavier rainfall and better drainage. Though the 
plant is halophytic in the sense that it tolerates saline soils, it 
does not appear to be a true halophyte, but rather a hydrophyte 
which thrives in somewhat saline spots, perhaps not because 
of their salinity but because they are moist and unshaded and 
furnish ample space for small species of prostrate habit. 
33. Chenopodium carinatum, #. Br. Prodr. p. 407 (1810). 
Souta Arrica. Transvaal: Heidelberg Dist., Burttholm, 
9 miles from Vereeniging, naturalized on a ‘gravel drive, Mch. 
1917, Burtt-Davy, 17,224 in herb. Bolus. 
annual prostrate herb, native of Australia, New Zealand 
and New Caledonia. Not previously recorded for 8. Africa 
Probably introduced with Australian garden seeds. 
34. Potamogeton nodosus, Poir. in Lam. Encyel. Suppl. iv. 
p. 535 (1861). P. fluitans, Auct. non Roth. 
Sout Arrica. Transvaal: Heidelberg Dist., Klip River at 
Kookfontein near Vereeniging, October 1915 and December 1919, 
in deep, still pools (associated with P. crispus, P. badius and an 
Aponogeton) Burtt-Davy 15,389, 18,175 and 18,176. Mr. Bennett 
has kindly studied my specimens and says of this species: 
‘* Distributed under many names. Hagstrém (Anat. Stud. Pot. 
1916, pp. 183-199) gives the best account of the plant yet given, 
although I do not agree with all his references to other names. 
The plant is distributed over Europe, N. America, Africa, Asia 
(rare) and perhaps the Marianne Islands. It has constantly 
been mixed up with P. flwitans Roth. (a hybrid), and Hagstrom 
ga....¢ 
was the first to really separate the various mixin 
35. Potamogeton crispus, Linn. Sp. Pl. ed. 1, p. 126 (1753). 
Sours Arrica. Transvaal: Heidelberg Dist., Klip River at 
Kookfontein near Vereeniging, Dec. 1919, Burtt-Davy 18,178. 
Mr. Bennett says: ‘In habit this is much like the Australian 
being smaller, with narrower leaves, etc., than the Europear 
B2 
