Cotyledon

Cotyledon - As understood by botanists, this now includes the groups long known as Echeveria and Umbilicus. The first of these is still known so universally under the old name that we have no hesitation in keeping to it in this book, and we have therefore only to deal with the Pennyworts—little succulent plants similar to the Houseleeks and once grouped under Umbilicus. They are planted as edgings or in dry places where few other things would live, and even thus the kinds are not all hardy. Four or five sorts are grown:—

C. chrysanthus, a little plant like a small Houseleek, about 4 inches high, with white or creamy-yellow flowers in short panicles. C. sempervivum grows rather taller, its dull green rosettes shaded with brown, and the pink flowers coming as large clusters in early autumn. This kind is most used for carpet-bedding, and the flowers are then carefully pinched out. Kurdistan. C. spinosus is a quaint little plant like a small Apicra or Haworthia, with a rosette of flat, spoon-shaped leaves, each tipped with a spine, and a spike of yellow flowers in early summer. It sometimes reaches a height of 12 inches or more, and is only hardy in dry and sunny places; in a sharp winter and in cold places it is only safe under glass, and it needs careful protection from slugs at all times. Siberia, China, and Japan. Syn. Sempervivum spinosum. S. sedoides is a little plant with thick reddish leaves like a Sedum, from S. Europe. C. simplicifolia is an interesting, desirable, and free-growing subject for the rock garden; flowers rich yellow in June and July, on arching and drooping Laburnum-like racemes. Seeds and cuttings. C. Umbilicus is a hardy British plant, with queer rounded leaves almost like a tiny mushroom, and greenish-yellow flowers in June. It grown on walls and rocky places near the south and west coasts, with stems of 6 to 18 inches, and leaves coming after the flowers are past.

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