carpus strobiliformis (en'-sef-ah-loh-kar'-pus)t with violei-pink blooms: Obregonta denegrii (oh-bre-goh'-nee-ah), with lovely white flowers; Strombocacius disciformis (strorn-boh-kak'-lus), and Aziekiimi ritteri (as-tek'-ee-um).
Three remarkable curiosities which may not really be classed as Living Rocks but which! arc no less amazing are the Dumpling Cactus, the Brain Cacti, and the Agave Cactus. The Dumpling Cactus, Lophophora williamsii (loh-fof'-oh-rah), is the well-known Peyote, from which the Indians extract the narcotic mescal, used in native religious cere~ monies. It is a small, round, spineless plant with broad, flattened ribs—not especially interesting either for its appearance or small white or pink flowers, but rather for its use as 'dry whiskey" by the Indians.
The Brain Cacti, on the other hand, are a distinct and beautiful genus with no close relatives. They gel their popular name from the dozens of thin wavy ribs which run down i the small, globular spiny plants giving them a curiously I wrinkled appearance. The pretty pink, purple, or white bell-shaped blooms are usually attractively striped and freely produced Stenocacfus ort as it is sometimes called. Echino-fossulocactus rnulticostatus (ee-ky'-noh-fos'-oo-loh-kak'-tus) is perhaps the best-known species, but is more difficult to grow than many other species which are generally as desirable and of very easy culture.
The Agave Cactus, Leuchtenbergia principis (loik-ten-berg'* ee-ah) is really one oi the great oddities in the Cactus family. From a large taproot a group of lung finger-like tubercles arise, each ending in a woolly areole. From these areoles come thin papery spines and large, yellow, fragrant flowers which last several days. The long, angled, blue-grcen tuber* cles and loose rosette form of this unique plant actually make it look more liicc an agave than a cactus,
The Barrel Catti. The Barrel Cacti are perhaps best known for the widespread notion that parched desert travelers can
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