409 
Adenoclineae of South Africa. 
petiolata, superiora lineari-lanceolata, sessilia, omnia margine integra ; 
stipulae lineares. — - Diplostylis angustifolia , Sond. in Linnaea, xxiii. 113 
(1850). Adenocline sessiliflora , Bail!., £tud. gen. Euphorb., 457, t. 9 , fig. 6 
(1858). Mercurialis bupleuroides , Baill., Adansonia, iii. 1 59, pro parte (1863) ; 
nec Meissn. Adenocline pauciflora , rj sessilifolia , Mull. arg. /// DC. Prodr., 
xv. 2, 1140 (1866). A. pauciflora, Pax Engl. & Prantl, Nat. Pflanzenf., 
iii. 5, 49 fig. 30 E (1890) ; nec Turcz. 
[VII a.] South-East Africa : Cape. Coast Region : Clanwilliam 
Div. ; Brakfontein, Ecklon & Zeyher, 40 ! Malmesbury Div. ; between 
Mamre and Saldanha Bay, Drlge, 1868! Cape Div.; Riet Valley, near 
Laudenbach, Ecklon & Zeyher , 39 partly ! Uniondale Div. ; near Avontuur, 
Bolus , 2460 ! 
A very distinct species. 
Distribution of Seidelia, Leidesia, and Adenocline. 
In the enumeration of the species of these three endemic South African 
genera, the geographical area of each, so far as this is known, has been 
stated in accordance with the subdivision of the African continent adopted 
for the genera Erythrococca and Micrococca in an earlier paper (Ann. Bot., 
xxv. 632-4). All the species of the three genera here dealt with are con- 
fined to the south of the tropic of Capricorn, and are met with only in the 
areas VI and VII of the previous paper. They, therefore, occur only in 
the catchment area of the Orange-Vaal or to the south and south-east of 
that catchment area, or in both of these regions. 
The South-eastern Region it was found convenient to divide into 
a western, or Cape, half from the Kei River westward, and an eastern, or 
Natal, half to the east of that stream. In the present instance it is con- 
venient to subdivide the South-western Region into a western or Namaqua- 
land half, and an eastern or Transvaal-Griqualand half. 
In the Namaqua portion of South-West Africa only one species, Leidesia 
firmula , is found ; the species is there endemic. In the eastern half of South- 
West Africa three species are met with : Seidelia triandra , Leidesia procum - 
bens, and Adenocline acuta. Only the first of these three is endemic ; the 
two others are cases of overflow from the Cape portion of South-East 
Africa. 
In the Eastern or Natal half of South-East Africa we again find three 
species, two of which, occurring only as overflows from the Cape portion of 
South-East Africa, are Leidesia procumbens and Adenocline acuta , species 
which also overflow into the Transvaal. The third Natal species, Adenocline 
bupleuroides , though not endemic, is almost as distinctive of Natal as 
Seidelia triandra is of Griqualand ; it only extends as an overflow into the 
Cape region proper for some little distance to the west of the Kei River. 
