CHE REFERENCE LIBRARY - Pole Shift Survival Information

396 THE NURSERY-MANUAL
seeds. Hand-pollination and cross-fertilization produce a reasonable
quantity of seed. The difi’crent v-arieties are readily crosspollinated,
making it possible to secure an endless extent of variation
within the limits of the different varieties. This seed can be
germinated readily under greenhouse conditions. The method
of handling the seeds is simple. They should be removed from the
ripe fruit and plant,ed singly, preferably in thumb-pots, and plunged
in well-drained beds. A sphagnum-moss covering may be used to
maintain the moisture. As soon as the seeds have germinated, the
moss may be removed and overhead watering discontinued. Half
shade should be maintained. As soon as a sufficient growth has
been ma&, the seedhngs may be shifted from time to time to larger
pots. The seedlings are delicate and subject to damping-off,
and other adverse e&ditions, but after they7 are four t,o six months
old they become rather robust and no great care need be exercised.
Over-watering is one of the most fruitful sources of failure with
seedlings. The most precocious seedlings may come int.o bearing
thirty months from the time the seed was planted. As soon as
the seedlings come into fruiting, t.he multiplication is somewhat
certain and rapid. T t varies greatly with different individual
plants. Csually those that, produce the smallest and poorest
fruits have the largest number of suckers and slips.
Pinguicula (Butterwort) . I,rlM ibular~incf~ff.
The species mostly seen in collections, P. caudata, is propagated
easily by leaf-cuttings. The leaves are broken clean from the stem
and ‘laid fiat in pans of sand protected by glass, the pan being placed
in a tray of water. FYhen the roots have formed, the plants may be
potted off. All the species may be grown from seeds when these are
to be had.
Pink : Carnation, D iazlthus.
Pinus (Pine). P~innccxE.
Seeds, wh.irh shculd be kept dry over winter, are commonly
employed. These are often started in pots, but for most species they
are sown in well-prepared beds outdoors. The seedlings must usually
be shaded the first season. Varieties, as also species that do not
produce seed freely, may be grafted on stocks of white or Austrian
pine or other species. This grafting may be performed on the
tips of growing shoots early in the season, but it is more often practiced
on potted plants by the veneer method. Pzinus Strobus should be