The cenchrus tribuloides, a most annoying grass, which is common here, supplies the place of the cactus ferox; and the troublesome stipas of the Platte now become less abundant. The cenchrus bears its seed in small spikelets, which consist of a number of rigid radiating spines. These clusters of barbed thorns are detached at the slightest touch, falling into our mockasins, adhering to our blankets and clothing, and annoying us at every point. The cloth-bur (xanthium strumianum), which had occurred in every part of our route, began now to ripen, and cast off its muricated fruit, adding one more to the sources of constant molestation.
A formidable centipede (scolopendra) was caught near the camp, and brought in alive by one of the engagees. It was about eight inches in length, and nearly three-fourths of an inch in breadth, being of a flattened form, and of a dark brown colour. While kept alive, it showed great viciousness of disposition, biting at every thing which came within its reach. Its bite is said to be venomous.
On the morning of the 8th, we continued our journey, crossing and recrossing the river several times. This we found necessary, as the occurrence of steep and rocky ravines made it impossible to pass along the bank, parallel to the course of the river, which here became more meandering, winding about the points of rocky and impassable promontories.
Few trees occur along this part of the valley; but grape vines were becoming numerous, and some of them loaded with fruit. Among these, we saw numerous signs of the black bear, and one of these animals was this morning seen and shot at, but not killed. We also saw some recent tracks of bison, reviving us with the hope of a return of the days of plenty. We constantly met with the remains of Indian { 287} encampments; trees which had been felled with the tomahawk, and other evidences that the country had been recently occupied by savages.
We passed in the afternoon to a more plain and fertile country than that we had been for some days traversing. The river valley became wide, and bounded on both sides by low and rounded hills instead of abrupt and perpendicular precipices. The interior of the country is but little elevated above the river, and its surface is nearly unbroken.