94 A GARDEN FLORA 
HOHER1A. Malvaceae. 
*H. populnea. New Zealand. 
Height 16 feet. Growing in the Wall Garden, 
in a sheltered corner, H. populnea flowered for the 
first time in September, 1914. It has much the 
same appearance and habit of growth as Plagianthus 
betulinus, though the flowers are like P. Lyallii. 
The plant came direct from New Zealand. Other 
plants bought in England have grown well in a 
cool house, but have not proved so hardy in the 
open. 
HOLBOELLIA. Berberidaceee. 
H. latifolia. Himalaya. 
Syn. Stauntonia latifolia. 
HOMERIA. Iridacese. 
H. collina. S. Africa. 
Several young plants have been raised from seed 
from the plants which flowered in the bulb border. 
HORMINUM. Labiatae. 
H. pyrenaicum. Pyrenean Dead Nettle. S. Europe. 
HOUSTONIA. Rubiaceae. 
H. coerulea. N. America. 
HOVENIA. Rhamnaceee. 
H. dulcis. China. 
Height 28£ feet. This tree was planted in the 
Wall Garden in 1905, but only flowered quite 
recently. Seed has never formed on the plant, 
neither have the flower-stalks swelled into the 
curious edible mass used by the Chinese. The 
flowers are hidden by the foliage. 
HOWEA. Palmae. 
|H. belmoreana. Lord Howe Island. 
HOYA. Asclepiadese. 
fH. carnosa. Wax Flower. Tropical Asia. 
