Some Neiu South African Succulents. 
37 
The species is very similar in habit and appearance to E. gummifera 
Boissier, but differs from it in its involucre, glands, and fruits. Just as 
E. gummifera is the dominating plant in some parts of the Namib, e.g., near 
Tschaukaib, this species determines the character of the landscape over a 
considerable portion of the interior of Great Namaqualand, especially in 
the country between the Little Karas Mountains, the lower Fish Eiver and 
the Orange River. Marloth, No. 4683. (See Fig. 7.) 
Euphorbia elastica, spec. nov. (Sect. Tirucalli.) 
Frutex ramosissimus habitu E. mauritaniccB, ramis striatis, cinereo- 
pulverulentis, ramulis brevibus, rigidis, erectis. Folia nulla vel decidua. 
Cyathia pedunculata in cymulis paucifloribus aggregata, basi foliolis 
2 magnis, rotundis, concavis, mucronatis, cyathio sublongioribus suffulta. 
Involucrum campanulatum lobis ovatis, fimbriatis, glandulis concavo- 
spathulatis, truncatis, apice crenulatis, basi margine involute angustatis, 
extus hirtis. Ovarium stipitatum, globosum, hirtum. 
A nearly spherical or somewhat egg-shaped shrub, 1-2 m. high, much 
branched from the base, the main branches 2-3 cm. in diam. Apparently 
leafless, the surface of the branches grey, covered with a whitish powder. 
The inflorescence on short lateral branchlets, 3-headed, the central 
cyathium sessile, the lateral ones stipitate, the stalk being 10-12 mm. 
long. Bracts 2, large, concave, almost enclosing the cyathium, each 
8-10 mm. wide. Involucre and glands hairy on the outer side, the lobes 
ovate and fimbriate; glands brown, curving upwards from a horizontal, 
narrow, clawlike, basal portion, the apex truncate and wavy. 
In habit the plant resembles other members of the section Tirucalli, 
but the cyathia are more like those of E. cervicornis. (Sect. Tjxisia.) 
Little Namaqualand, near Anenous, between Port Nolloth and the 
higher interior, covering wide stretches of country. Marloth, 4684. 
The milky juice has been used for the manufacture of rubber, but it 
contains much resinous matter. 
Euphorbia hypog^a, spec. nov. (Sect. Medusea.) 
Eadix napiformis. Caules plures e summo radicis, subterranei. Rami 
breves. 1-3, cylindracei, podariis numerosis elongatis. Folia linearia, 
caduca, 5-8 mm. longa. Cyathia pedicellata, erecta, solitaria vel 2-3 ; 
involucrum campanulatum segmentis fimbriatis, glandulis lunatis viri- 
dibus. 
Root and main branches are underground, the short branchlets only 
appearing above the surface. The tubercles are elongated, nearly as long 
as the branch is thick, viz. : 4-5 mm., the total diam. of the branch being 
