Ageratum Mexicanum. - Its pale blue and white varieties are annuals, easily raised from seed, and used for bedding-out. The best plants, however, are those raised from cuttings, as they are more compact and dwarfish in their habits, and do not run so much to foliage and stem as those from seed, and produce a greater profusion of bloom. Plants taken up in autumn, and placed in the conservatory, will, when pruned in, produce a plenty of young wood for cuttings, or for flowers during winter.