The _sajji_ is a low, bushy plant, chiefly produced in the northern desert, and most abundant in those tracts of Jaisalmer called Khadal, now subject to Daudputra. From Pugal to Derawar, and thence by Muridkot, Ikhtyar Khan-ki-garhi, to Khairpur (Dair Ali), is one extensive _thal_, or desert, in which there are very considerable tracts of low, hard flat, termed _chittram_,[8.2.66] formed by the lodgment of water [330] after rain, and in these spots only is the _sajji_ plant produced. The salt, which is a sub-carbonate of soda, is obtained by incineration, and the process is as follows: Pits are excavated and filled with the plant, which, when fired, exudes a liquid substance that falls to the bottom. While burning, they agitate the mass with long poles, or throw on sand if it burns too rapidly. When the virtue of the plant is extracted, the pit is covered with sand, and left for three days to cool; the alkali is then taken out, and freed from its impurities by some process. The purer product is sold at a rupee the ser (two pounds weight); of the other upwards of forty sers are sold for a rupee. Both Rajputs and Muhammadans pursue this employment, and pay a duty to the lord paramount of a copper pice on every rupee’s worth they sell. Charans and others from the towns of Marwar purchase and transport this salt to the different marts, whence it is distributed over all parts of India. It is a considerable article of commerce with Sind, and entire caravans of it are carried to Bakhar, Tatta, and Cutch. The virtue of the soda is well understood in culinary purposes, a little _sajji_ added to the hard water soon softening the mess of pulse and rice preparing for their meals; and the tobacconists use considerable quantities in their trade, as it is said to have the power of restoring the lost virtues of the plant. =Grasses.=—Grasses are numerous, but unless accompanied by botanical illustration, their description would possess little interest. There is the gigantic _siwan_, or _siun_, classically known as the _kusa_, and said to have originated the name of Kusa, the second son of Rama, and his race the Kachhwaha. It is often eight feet in height; when young, it serves as provender for animals, and when more mature, as thatch for the huts, while its roots supply a fibre, converted by the weavers into brushes indispensable to their trade. There is likewise the _sarkanda_, the _dhaman_, the _duba_, and various others; besides the _gokhru_, the _papri_, and the _bharut_, which adhering to their garments, are the torment of travellers.[8.2.67]