aiop the plants. Bui like the Itthops. the conophvtums go through a very distinct growth cycle each year. The new plant body forms inside the old, draws on it for sustenance, breaks through its withered remains at the beginning of the growing season, flowers, forms seed, and completes its cycle by nurturing another young plant within itself for the coming year, Unfortunately the conophyturns are not very well represented in American collections, and relatively few species arc available to the beginner. Of these he might choose C. braunsii, with its small, flat-topped, clustering plants and bright magenta-pink ñowers; C giftbergensis, with pale green, grapelike clusters and yelow blooms; C. minuium, a very tiny gray-green species which forms thick clumps a half inch high topped with purple flowers; or C meyerae, one of the rare bilobed conophytums, whose forked two-inch growths and yellow flowers are somewhat difficult but interesting.
These twin factors of difficulty and availability must necessarily limit any excursion into the stone-mimicry and wmdowed mesembryanthemums, for while their number is legion they are not all easy or accessible to the beginner. Of the genera that remain we might pick a lew plants at random, however, that are within the reach of any collector.
Among the stone-mimicry plants there are several genera whose members grow in white quartz soil, so they have taken on a white, gray, o bluish coloring that makes them almost invisible. Perhaps the finest of these are the Silverskins, members of the genus Argyroderma (ar'-ji-roh-dur'-mah), whose plants consist of only two, rounded, silvery-white leaves with a deep cleft between that match, perfectly the broken pieces of white quartz among which they grow. A. octophyllum, with yellow blossoms, is perhaps the most popular; A. rosewn> with three-inch rose-violet flowers, the most spectacular; and A. braunsii, with long, finger-like leaves, the strangest Voy much like the argyrodermas, and once classed with them, is the popular Karroo Rose, Lapidaria margaretae (lap-i-day'-
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