P. LAMPENI.--Van Dieman's Land, 1833. This is about equally hardy with
the former, and produces a great abundance of sweetly-scented flowers.

P. PULCHELLUS (_syn Sida pulchella_).--Australia and Tasmania. Another
half-hardy species, which bears, even in a young state, an abundance of
rather small, whitish flowers.


POLYGALA.

POLYGALA CHAMAEBUXUS.--Bastard Box. A neat little shrubby plant, with
small ovate, coriaceous leaves, and fragrant yellow and cream flowers.
P. chamaebuxus purpureus differs in bearing rich reddish-purple flowers,
and is one of the most showy and beautiful of rock plants. They are
natives of Europe (1658), and grow best in vegetable mould.


POTENTILLA.

POTENTILLA FRUTICOSA.--Northern Hemisphere (Britain). An indigenous
shrub that grows about a yard high, with pinnate leaves and golden
flowers. It is a most persistent blooming plant, as often for four
months, beginning in June, the flowers are produced freely in
succession. It delights to grow in a strong soil, and, being of low,
sturdy growth, does well for the outer line of the shrubbery.


PRUNUS.

PRUNUS AMYGDALUS (_syn Amygdalus communis_).--Common Almond. Barbary,