SE EN 
stones lie almost always with their flat surface upwards, and 
there are strata of sand and gravel. 
Fifteen kilomètres towards the west the same plain is 
watered by Kara Su, a little river flowing into the Murghab 
on the left. Here the Kara Su valley is called Jaman Tal. 
Its sides, 30 mètres high, are perpendicular walls of con- 
glomerate with strata of sand and gravel. 20—30 cm below 
its surface there is a layer of sand about a mètre thick. 
Jaman Tal has many lateral valleys, through which an ap- 
proach to the plain is possible; these are quite dry now. 
With its perpendicular walls, regular lateral valleys, strata 
and drought, Jaman Tal resembles the famous Grand Canyon 
of the Colorado in Arizona. In point of size, however, no 
resemblance is possible. A photograph of Jaman Tal. has 
been published by M™ OLGA FEDTSCHENKO in Flore du Pamir 
(Table 5). 
The landscape about Pamirski Post is desolate. The 
barren, stony, rolling plain is encircled by rounded slate 
mountains, brown and naked like the plain itself. A clear 
blue sky arches overhead and the sun beats down on the 
dry silent country. 
On a horizontal section of the plain the vegetation is 
extremely scattered: Christolea crassifolia, dwarf Ephedra, Ar- 
temisia, Eurotia ceratoides, Crepis flecuosa, Zygophyllum Fa- 
bago, and a grass with terete slender leaves, are all found in 
separate tufts. In the direction of some low-lying hills the 
vegetation becomes somewhat richer with only 1—5 métres 
between each plant. Here, in addition to the species already 
mentioned, we find the hemicryptophyte Arnebia guttata and 
the suffrutex Sympegma Regelit. 
Westward towards Shatshan, the plain slopes a little and 
has an eastern exposure. Here the vegetation is relatively 
rich: Eurotia ceratoides, Stipa orientalis, Astragalus Musch- 
ketowii, Astragalus ophiocarpus, Crepis flexuosa, Christolea cras- 
sifolia, Zygophyllum Fabago, Arnebia guttata, Oxytropis tibe- 
tica (single specimens) and, strangely enough, a smooth little 
annual Senecio (S. coronopifolius var. parvulus). With the ex- 
ception of the latter and of Crepis all the plants are short 
compressed tufts. The same species are to be found on the 
3% 
