— 107 — 
sella procumbens is a small, delicate annual plant which 
disappears very quickly. 
The remainder of the plants of the spring-aspect in the 
Sand-desert can be classed, like those of the Clay-desert under 
the groups: Ephemerals, Hemicryptophytes and Geophytes. 
The following species belong to the ephemerals which are 
the most abundant group: Triticum squarrosum and desertorum, 
Danthonia Forskalei, Schismus calycinus, Bromus tectorum, Bois- 
siera bromoides, Avena sterilis, Hordeum murinum, Papaver 
pavoninum, Hypecoum parviflorum, Capsella procumbens, Isatis 
minima and emarginata, Tetracme quadricornis and recurvata, 
Lachnoloma Lehmanni, Malcolmia circinnata, grandiflora and 
Bungei, Streptoloma desertorum, Euclidium syriacum, Octoceras 
Lehmannianum, Goldbachia laevigata, Chamaesphacos ilieifolium, 
Lallemantia Royleana, Anchusa hispida, Nonnea picta, Echino- 
spermum semiglabrum, Plantago lachnantha, Statice spicata, 
Valerianella Dufresnia, V. Szovitsiana, Crucianella filifolia, Ero- 
dium bryoniaefolium, E. oxyrrhynchum, Astragalus arpilobus, 
Ceratocephalus falcatus, Delphinium persicum, D. camptocarpum, 
Matricaria lamellata, Scorzonera glabra, S. hemilasia, Senecio 
subdentatus, Koelpinia linearis, Lactuca undulata, Heteroderis 
pusilla, Heteracia Szovitsii, Cousinia alata, tenella and minuta, 
Dipterocoma pusilla, Centaurea moschata, pulchella and phyllo- 
cephala, Silene nana, Psammogeton setifolium, Eremodaucus 
Lehmanni, Aphanopleura capillifolia, Diarthron vesiculosum, 
Atriplex dimorphostegium. 
Many species in this list occur also amongst the epheme- 
ral plants of the Clay-desert. Those which I have not already 
remarked on in the Clay-desert are of the same type: low, 
mesophytic or slightly xerophytic plants, sappy and without 
much mechanical tissue, and almost all with small leaves or 
leaflets which are often more or less hairy. A few have gla- 
brous leaves (Senecio, Diarthron). Thorns are found on Cou- 
sinia alata and minuta, Centaurea phyllocephala, Centaurea 
Moschata; a few others have rather broad leaves. Heteroderis 
pusilla, Hypecoum and some Cruciferae have rosettes. 
A comparison between figure 17 and figures 5 and 6 
will show that the ephemerals of the Sand-desert are of the 
same type as those of the Clay-desert. 
