140 A GARDEN FLORA 
PLEROMA. See TIBOUCHINA. 
PLUMBAGO. Plumbaginacese. 
fP. capensis. S. Africa. 
fP. rosea. India. 
See also CERATOSTIGMA. 
PODOCARPUS. Taxacese. 
P. alpina. Victoria and Tasmania. 
An almost prostrate shrub, grown for years in 
the Rock Garden. 
fP. dacrydioides. New Zealand. 
fP. ferruginea. New Zealand. 
Height 11 feet. Imported from New Zealand, 
and grown in the Shrub House for seven years, but 
not yet tried in the open. 
P. macrophylla. Japan. 
„ var. Maki. China and Japan. 
„ var. 
fP. spicata. New Zealand. 
Syn. Prumnopitys spicata. 
P. Totara. New Zealand. 
Height 7 feet. It grows freely and is apparently 
hardy. Planted in the Pinetum 1903. 
PODOCYTISUS. See LABURNUM. 
POLEMONIUM. Jacob’s Ladder. Polemoniaceae. 
P. coeruleum. Jacob’s Ladder. N. Temperate regions. 
POLIOTHYRSIS. Bixacese. 
P. sinensis. China. 
Height 7 feet. Planted in the Arboretum 1914. 
It survived previous winters in the nursery without 
protection. 
POLYGALA. Polygalaceae. 
P. Chamaebuxus. Milkwort. Central Europe. 
„ var. purpurea. 
fP. mixta. 
