CHE REFERENCE LIBRARY - Pole Shift Survival Information

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434 THE NURSERY-MANUAL
Turnip (Brassica. Rupa). C~r~c$er~.~.
Raised from seeds, where t,he plants are to remain. For summer
use, seeds may be sown very early in spring ; but for the main crop
sowing is made in July in the northern states.
Typha (Bulrush. Cat,-tail. Reed Mace). Typhace~.
Propagated by division of the colonies. They may be grown from
seeds in a pot or box of earth set in water.
Udo (Arabia cordata). Araliacee.
This Japanese vegetable, consisting of the blanched young shoots,
is readily propagated by seeds start.ed in spring under glass, the
plants bcin, 0 transferred to the open. when 3 or 4 inches high ; the
following spring they should supply a cutting. Special strains are
perpetua.ted by cuttings of the green shoots, cut to a joint.
Ulex (Furze. Gorse. Whin). Leguminosa).
Propagated bJ7 seeds sown in spring ; by greenwood cuttings
under glass, and by cuttings of nearly mature wood in early summer
in a coldframe under glass. Varieties are sometimes grafted in
spring in the greenhouse on 77. europaw.
Ulmus (Elm). I’1 mace@.
Commonly propagated by seeds. The seeds of most elms germinate
the year they mature (they ripen in spring), and they may be
sown at once. The slippery elm ( U. fulca), however, generally
germinates the following year, and the seeds should be stratified.
Layers are sometimes put down in autumn in moist, rather light
soil, and suckers may be taken. Some species may be raised
from greenwood cuttings under glass. The varieties are grafted on
common stocks; either by budding in summer or by whip- or splicegrafting
in spring outdoors or 09 potted stock in the greenhouse.
Ursinia. Corflposita?.
A hardy flower-garden annual raised from seeds, started indoors
or directly in the open.
Utricularia (Bladderwort). Lentibulariacecle.
The floating bladderworts, used in pools and aquaria, are multiplirtl
by division of the plants and by utilizing the winter-buds that
fall to the bottom in autumn. The terrestrial tropical kinds usuaiiy
produce little tubers by which they may be propagated.