In several numbers of the Horticulturist, and various nursery catalogues lately published, the Cladrastis tinctoria is called by Michaux's old name, Virgilia lutea, * which has been discarded by most botanists, because it is very distinct from a true Virgilia - a genus named by La March: in honor of the poet Virgil. The name given by Michaux, in the infancy of our botany, proving to be wrong, Rafinesquk formed of it a new genus - Cladrastis - in 1825, with the specific name of tinctoria, from the yellow coloring matter contained in its wood and roots. The authority of Rafinebque has been followed by Endlichkr, in his Genera Plantarum, now acknowledged to be the standard work on botanical genera; and also by Torry & Gray, in their Flora of North America. There are three species of Virgilia cultivated in England, according to Loudon, all shrubs, one of which is a native of Abyssinia, and two of the Cape of Good Hope.

I saw a fine Cladrastis tinctoria on the banks of the French Broad river, near Paint Rock, in East Tennessee, a few miles from the Warm Springs in North Carolina. It was nearly a foot in diameter, and about twenty-five feet high, with pinnate leaves, and very large, ovate, deep green leaflets, and flowers much like the common Locust, (Robinia pseudo-acacia). This was the only Cladrastis I saw during a botanical tour through Tennessee and among the mountains of North Carolina. I also have specimens received from Prof. Short, collected on Kentucky river. It is a rare tree, both in the South and South-western States, and seems to be rather rare in the nurseries. Last spring I was told there were none' suitable for transplanting in any of the nurseries at Flushing, Long Island. I saw a few specimens in one of the hothouses of the Messrs. Parsons, at the latter place, which were raised from the seed, and but three or four inches high, which I was informed were all they had.

While writing of the Messrs. Parsons, I must add that there I saw thousands of Pines, Cedars, Firs, and other kindred families, growing from cuttings. + I supposed till then that all these genera had to be propagated from the seed, but there these future trees, from two to six inches high, were growing nicely in boxes of a sandy loam.

* Virgilia is the name in all nursery catalogues, and in moat of the botanical works to which reference is more commonly made. The Bon Jardinisr has It Cladaris, after RAFINESQUE . Loudon'sArboretum, and MicauoEs Sylou, the two great works on trees, do not mention Cladcutris. Paecton's Botanical Dictionary enumerates six species of Virallia, all evergreen shrubs, except the lutea: one a native of Abyssinia, the others of the Gape of Good Hope. These are greenhouse plants. - Ed.

+ We think oar correspondent mast be mistaken In regard to Pines and Firs being propagated by thousands from cuttings, by the Messrs. PaRsoNs. It is not practicable to propagate either from cuttings on a scale of sufficient importance for a nurseryman, besides the plants so raised are of little value as compared to seedlings. Junipers, Cedars, Cypresses, Arbor Vitse, Ac, are grown successfully from cuttings. - Ed.