Spinosa), exarch-diarch in several (fig.
Nultalli, Tetradymia canescens, Sarcobatus vermiculatus and Gray-ia spinosa) are characteristic species, and on the mountain slopes are some nut pines (psif on) and junipers.
A third species, the common sloe or blackthorn, P. spinosa, has stout spines; its flowers expand before the leaves; and its fruit is very rough to the taste, in which particulars it differs from the two preceding.
In the Swiss lake-dwellings stones of the P. insititia as well as of P. spinosa have been found, but not those.
In the low brushwood scattered over portions of the dreary plains of the Kandahar table-lands, we find leguminous thorny plants of the papilionaceous sub-order, such as camel-thorn (Hedysarum Alhagi), Astragalus in several varieties, spiny rest-harrow (Ononis spinosa), the fibrous roots of which often serve as a tooth-brush; plants of the sub-order Mimosae, as the sensitive mimosa; a plant of the rue family, called by the natives lipdtd; the common wormwood; also certain orchids, and several species of Salsola.
Shir Khist, a manna known to writers on materia medica in the 16th century, is imported into India from Afghanistan and Turkestan to a limited extent; it is the produce of Cotoneaster nummularia (Rosaceae), and to a less extent of Atraphaxis spinosa (Polygonaceae); it is brought chiefly from Herat.