(S-pecularia. Nat. Ord. Campanulaceae). This plant, sometimes known as the Corn Violet, is one of a group of very charming, hardy, summer flowering annuals, named the Specularias, all of which are eminently suitable for the decoration of spaces in the rock garden. Autumn sowing where the plants are to flower suits them best, but whether sown in the spring or the autumn they should certainly be thinned out to about 6 ins. apart each way. The following are the best species : Specularia falcata. A blue summer blooming annual, about I ft. high. S. hyhrida.Pale blue or lilac, blooming from June onwards. About 6-12 ins. high. S. pentagonia.Deep blue, blooming from July onwards, and averaging I ft. high. S. perfoliata. A purple-blue species, flowering about midsummer, and growing about i ft. high. S. Speculum (Syns. S. arvensis, hirsuta, stricta, and vulgaris).This is the well-known Venuss Looking- Glass so often grown. It is almost needless to say that it bears white or purple flowers through the summer, and averages 12 ins. in height.
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