Different species of Oak. This country is peculiarly rich in various kinds of oak; Michaux enumerating no less than forty species indigenous to North America. Of these the most useful are the Live oak (Quercus virens), of such inestimable value for ship-building; the Spanish oak (Q. falcata); the Red oak (Q. rubra), etc., the bark of which is extensively used in tanning; the Quercitron or Black oak, which is highly valuable as affording a fine yellow or brown dye for wool, silks, paper-hangings, etc.; and the White oak, which is chiefly used for timber. We shall here describe only a few of those which are most entitled to the consideration of the planter, either for their valuable properties or as ornamental trees, and calculated for planting in woods or single masses.