Quite unlike the spectacular dudleyas, the liny Mexican genus Urhinia (ur-bin -ee-ah) contains only a handful of modest little plants. All of ihem have thick, sharply pointed leaves held in a close rosette and slender, moderatelv attractive flower spikes, ¡he best-known species is U agavoides, whose smooth, shiny, fat green leaves stand a little erect like its namesake, the agaves. It makes an interesting small potted plant, especially in its freakish cristate form Other good species, though somewhat similar, are U. corderoyi and ihe brown -spotted U. purpusii.

Of far greater value to the collector is the attractive genus Pachyphylum (pa-kif -¡-turn), whose thick, rounded leaves attached to stout, erect stems are perhaps the most exquisitely shaped and colored in the whole Echeveria tribe. These are beautiful plants, with pearl-toned leaves and stunning bell-shaped flowers that are a "must" for any collection. Among the eight or nine species in the genus we might >elect P com-pactum for its short, cylindrical, blue-gray leaves and subtly colored blossoms; or P. bracteosum, with its thick grav-white leaves and bright red spring flowers. But tlie finest of them all is P. oviferum, whose thick, fleshy, egg-shaped leaves are like smooth Moonstones softly flushed with lavender pink, hence its popular name.

It is not surprising that hybridists have tried to extend the rare colors and forms of these pachyphyturns to other members of the tribe. To this end they have crossed the echcver-ias with the pachyphytums to produce a race of hybrids called Pachyveria (pak-i-vee'-ree-ah). These are ail very popular plants because they partake something oi both their parents. Here the rosette form of the echeverias and the plump, richly colored leaves of the pachyphytums are combined in such hybrids as Pachyveria glauca, whose thick rosettes arc powdered and mottled blue gray; P. scheideckeri, with fine whitish-green roseues; and that wonderful crested variety, P. c lav ifolia cristata.

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