930 Lee. — Notes on the Anatomy and Morphology of 
name Adenium namaquanum 1 from material supplied by Wyley. It is 
here stated that the plant was popularly known as Elephant’s Trunk; the 
aptness of this name can be seen from Text-fig. i, which is a photograph of 
the whole plant in its natural habitat. Welwitsch transferred this species 
from the genus Adenium to Pachypodium . 2 The account in the ‘ Flora 
Capensis ’ is taken from that in Harvey, and hence, as in Paterson’s figure, 
the spines are again erroneously said to occur in pairs. 3 
The material for this investigation, consisting of the upper parts of two 
stems preserved in spirit, was obtained by Dr. Pearson on the Percy Sladen 
Memorial Expedition, 1908-9. In the ‘Gardeners’ Chronicle’ of Dec. 4, 
1909, there appeared a photograph of the growing plant, together with an 
Text-fig. i. Photograph of Pachypodium namaquanum . 
article by Dr. Pearson, 4 from which the following is quoted : : It [Pachy- 
podium\ occurs on the very barren schistose ridges at Dabainorup, a few 
miles south of the Orange River, where it is associated with Aloe dichotoma , 
a species of Commiphora , and a few Acanthaceous bushes. The stout fleshy 
stem emerges from rocks which daily become so heated in the sun that 
a thick-soled boot is quite inadequate as a protection, and the nails therein 
become so enlarged that as soon as they cool they fall out. The inner 
tissues store an enormous quantity of water, 5 and the development of hard- 
walled cells is so slight that the whole mass can be cut through with the 
1 Harvey (1). 2 Welwitsch (7). 3 Stapf (6). 4 Pearson (3). 
6 This water is stored in both the cortex and the pith, and drips from the stem when the latter 
is broken. 
