A fine field of wheat, which appeared to be ripe, extended down to the brink of the river opposite the spot where we lay. This belonged to the plantation of a farmer, recently from Virginia. From him we obtained a plentiful supply of milk, and some bacon hams. A portion of the bank had lately fallen into {66} the river, and with it a part of the wheat field, and the dwelling house and other buildings seemed destined soon to follow. The shore here was lined with the common elder, (sambucus canadensis) in full bloom, and the cleared fields were yellow with the flowers of the common mullein. This plant, supposed to have been originally introduced from Europe, follows closely the footsteps of the whites. The liatris pycnostachia, here called "pine of the prairies," which was now in full bloom, has a roundish tuberous root, of a warm somewhat balsamic taste, and is used by the Indians and others for the cure of gonnorrhœa. The Indian interpreter, Mr. Dougherty, also showed us some branches of a shrub, which he said was much used among the natives in the cure of lues venerea. They make a decoction of the root, which they continue to drink for some time. It is called "blue wood" by the French, and is the symphoria racemosa of Pursh, common to the maritime states, the banks of the St. Lawrence, and the Missouri. It is here rather taller, and the branches less flexuous than in the eastern states.[096] Without meeting any remarkable occurrences, we moved on from day to day, encountering numerous obstacles in the navigation of the river, and being occasionally delayed by the failure of some part of the steam-engine, till on the 2d of July, we arrived at Loutre Island, where we found Mr. Say and his companions.