393 
Adenoclineae of South Africa . 
male plant collected by Zeyher), A. humilis (Drege 8223, male), and, lastly, 
A. sessilifolia (Drege 1867 and 1868, both male). The second species is 
a spurious one ; in the male specimens the leaves are not opposite, so that 
this portion has to be excluded from the species A. pauciflora and trans- 
ferred to A. humilis , with which it agrees. At the same time the female 
specimen, which does have opposite leaves and therefore is A. pauciflora , 
Turcz., is only the other sex of A. Mercurialis, Turcz. The last ‘species ’, 
A. sessilifolia , is a mixture of two distinct plants. 
Meissner’s species of 1843 were Mercurialis tenella — Krauss 1191 
male = Adenocline humilis, Turcz. ; M. bupleuroides — Krauss 1169 male, 
a species unknown to Turczaninow — though Meissner has placed here 
Drege 1867 definitely and Drege 8223 doubtfully, these two plants differ 
specifically from each other and from M. bupleuroides ; M. serrata = Krauss 
ti 90 male = A. ovalifolia , Turcz.; M. caffra in two varieties, a brevipes 
— Krauss 156 male = A. pauciflora, Turcz., as to description, and f 3 longipes 
= Krauss 1192 =A. Mercurialis , Turcz. The treatment by Turczaninow 
and Meissner is thus singularly uniform. The chief differences are that 
Meissner found room only for two varieties, M. caffra , a brevipes and 
ft longipes , where Turczaninow had recognized two species, A. pauciflora 
and A. Mercurialis ; also that the two authors treated Drege 1867 differently. 
But in the latter case the discrepancy is apparent rather than real ; Tur- 
czaninow united Drege 1867 with A . sessilifolia , a species unknown to 
Meissner, while Meissner united Drege 1867 with M. bupleuroides , a species 
unknown to Turczaninow. As a matter of fact, Drege 1867 belongs to neither 
species, but is identical with the one for which, in 1847, Kunze half-heartedly 
suggested the name M. Zeyheri 
In 1850 Sonder had only four species. The first is Diplostylis angusti - 
folia , and as this includes Drege 1868 it is — A. sessilifolia , Turcz. Sonder 
has cited four gatherings : Drege, 1868; Ecklon & Zeyher, 40; Ecklon 
& Zeyher, 39 (Riet Valley) ; Zuurberg, Zeyher. The last is not in herb. 
Sonder, and the identification is somewhat improbable. The other three 
are conspecific. The second species is D. bupleuroides ; only two gatherings 
are quoted, in both cases the plant is M. bupleuroides , Meissn. Equally 
simple is D. caffra, since all the gatherings cited belong either to M. caffra , 
a brevipes , Meissn., or (3 longipes , Meissn., and all belong either to A. pauci- 
flora, Turcz., or to A. Mercurialis , Turcz.; but Sonder’s treatment is an 
improvement on that of both Turczaninow and Meissner, since it amal- 
gamates what were two poor species and two indifferent varieties. But the 
remaining species, D. serrata , Sond., is a mSlange of two plants. There are 
in herb. Sonder four specimens to which this name has been attached. One 
of these is part of ‘ Ecklon & Zeyher 39 ’, collected at Swellendam by 
Mund ; another is ‘Zeyher 1516’, collected by Stack; both of these are 
A. ovalifolia , Turcz. The third is part of ‘Ecklon & Zeyher 39’, gathered 
