Botany and horticulture have become so closely interwoven that the two generally go together now in the old world. The latest novelty in conventions is to bring together those who are interested in any one class of plants, both botanists and horticulturists, and they exhaust the whole subject. Last year, in London, they had an orchid convention, and the advance made in orchid knowledge by the meeting convention was remarkable. Next we are to have a conference on Primula, or the primrose family, at South Kensington, on the 23d of April. The members will examine every plant or specimen that might be offered for exhibition. The 24th will be devoted to reading papers, and talks about primroses. As under this term we have Auriculas, Polyanthus, American Cowslips and numberless other popular favorites, the interest in the convention will no doubt be equal to that taken in the orchid.

The committee for the United States consists of Prof. Asa Gray, of Harvard; Prof. Lawson, of Halifax, Nova Scotia; Prof. Thurber, of Now York, and Prof. Meehan, of Philadelphia.