124 
Transactions of the Boyal Society of South Africa. 
ii., 43, T. 208). The plant is, however, fairly frequent in the sandy tracts of 
the coast districts from Darling to Clanwilliam. 
Young plants, when not in flower, somewhat resemble E. caput 
medusce, the central stem generally remaining buried in the ground. 
While, however, in E. caput medusce the broad apex of the stem continues 
to produce short branches on its sides, thus gradually forming a cushion- 
shaped body, the stem of E. tuberctdata ceases to grow, the branches on 
the other hand becoming thicker and considerably elongated, thus forming 
a group of cylindrical stout stems 1-2 feet high. 
When flowering these groups are very ornamental, for each shoot 
carries a dense head of 30-50 large flowers, which are borne on long stalks, 
the glands being green and their teeth white. 
In cultivated plants, as that from which Jacquin's figure was drawn, 
these erect branches may occasionally branch again. 
Euphorbia Dkegeana, E. Mey. 
The description of this species in DCs prodromus (vol. xv., sect. 1, 
p. 95) was made from incomplete specimens only. As I have cultivated 
the plant for some years in my garden I am enabled to add the characters 
of the leaves. 
Leaves on young shoots only, alternate, sessile, triangularly cordate, 
acuminate, concave and channelled above and much recurved ; length 
6-8 mm., width 3-4 mm. at base, deciduous. 
This plant is probably the same as E. elastica, Marl., No. 4684 (Trans. 
Eoy. Soc. S.A., vol. ii., p. 37), hence we prefer to cancel the latter name 
and refer it to the synonyms. 
ASCLEPIADACE^. 
Stapelia albo-castanea, spec. nov. 
(Plate, VIII., fig. 5.) 
Planta humilis, ramosa ; inflorescentia ramificata, 3-6-flora, floribus 
longe pedicellatis. Corolla radiata, tubo brevissimo, paullo concavo ; 
segmenta elongato-triangularia, albida vel flavescentia, transverse brunneo- 
maculata, pilis clavatis ciliata. Coronas exterioris segmenta linearia, apice 
bipartita, castanea ; coronae interioris segmenta subulato-filiformia, erecto- 
conniventia apice recurvata, dorso longe cornuta. 
Stems 6-8 cm. long, curving upwards, glabrous, nearly quadratic, the 
sides, without the teeth, 12-14 mm. broad, the teeth 3-5 mm. long, the 
surface glabrous, dull green, mottled with dull red spots. Flowers several, 
3-6, from the middle portion of a stem, opening in succession, the 
