— 135 — 
about 7 metres high was growing on sandy soil in the valley 
of the oasis. 
The vegetation here is undoubtedly influenced by the 
neighbourhood of the river, the occurrence of Lycium in the 
desert is strongly suggestive of this. It is very plentiful in 
the riverside-forest, and the desert specimens no doubt origi- 
nate from there. 
13. Sand-desert near Nukus (Chiwa). The desert lies 
beyond a narrow fringe of thickets along the bank of the 
river and is limited by a glissade-slope descending to the 
river. In the desert near this slope are seen some darker 
patches which are hard rocks in situ drifted over by sand 
and protruding above it. These patches are almost devoid 
of vegetation, only a few specimens of Salsola sogdiana and 
Halimocnemis sp. being seen. On the fine loose yellowish 
sand where the sand-drift is very slight, the vegetation is 
far richer, the soil being occasionally rather closely occupied 
with tufts of plants. Artemisia maritima(?) is here very com- 
mon and the following were also noted: Reaumuria oxiana, 
small Calligonum bushes, Ammodendron sp. (with the shrubby 
form although attaining a height of 3 metres), low Saxauls 
and Salsola Arbuscula, Heliotropium sogdianum, Haplophyllum 
obtusifolium and a few poorly developed tufts of Aristida 
pennata. 
SECTION II. GROWTH FORMS 
CHAPTER 12 
Plant-list and Statistics. 
The following gives a list of the plants of the desert-area 
treated in this memoir. Mountain-plants and species which 
only occur on cultivated land are excluded, but it includes 
aquatic and marsh-plants and the species occurring in the 
