— 237 — 
flowered in May or June and the richly branched floral axes 
remain green and persistent, and as in S. cordifolia (Ross 
p. 20) they are the assimilating organs for summer. Their 
structure may be seen in fig. 61: collateral vascular bundles 
occur in the pith (comp. SOLEREDER 1899 p. 564); the wood 
forms a solid cylinder of libriform cells; the cortex consists 
of green tissue, details of which are given in figures B & C. 
Some Summer - Hemicryptophytes occur in the more 
favourable localities, in depressions near rivers and similar 
places. These are only slightly xerophytic and have distinct 
leaves, generally not very large and often hairy. These plants 
which I have not investigated very closely include, for in- 
stance, the following species: Convolvulus pilosellifolius and 
subhirsutus, Inula caspica, Jurinea derderioides, J. Pollichü, 
Cousinia triflora, platylepis and 
dissecta (spiny), Centaurea ibe- u“ 
rica, Echium italicum, Lindel- C AN | 
ofia anchusoides and Aster 
Tripolium. 
D. Geophytes. er 
The majority of these are 
bulbous plants (comp. chap. Ans Ses 
12, p. 170), and I have only GOA ECO 
investigated specimens of three OT ‘à 
important genera Dodartia, 
| J 
Heliotropium and Aristida. Page ec. ole 
Dodartia orientalis L. (AC \ Stel AE 
This species is a Root- BA Dale ys: 
Geophyte which grows in the 5 
more favourable localities on 
clayey soil. Its leafless branch- 
ed shoots bear purple flowers 
in May or June. The branches, Fig. 62. Dodartia orientalis. A, Part 
as illustrated in fig. 62, have of transverse, section of stem; Phil, 
> 
a thick epidermis and below Detail of A. A, X 47; B, X 203). 
Phloém. Sclerenchyma black. 3, 
