
          59022. PIERIS sp. Ericaceae. From Yunnan, China. Collected by J. F. 
Rock, National Geographic Society, Washington, D. C. A handsome shrub, 
3 to 4 feet high, found in the outskirts of pine forests at about 10,000 
feet altitude. The elliptical leaves are dark glossy green and the 
white, bell-shaped flowers are in erect spikes. Probably tender north 
of southern Ohio. (Bell, Md.)

59708. PIERIS sp. Ericaceae. From Yunnan, China. Collected by J. F. 
Rock, National Geographic Society, Washington, D. C. An attractive shrub 
about 6 feet high which grows on the Likiang Snow Range at an altitude 
of 10,000 feet. It has red branchlets and short racemes of white, bell-
shaped flowers. Probably tender north of southern Ohio. (Bell, Md.)

59709. PIERIS sp. Ericaceae. From Yunnan, China. Collected by J. F. 
Rock, National Geographic Society, Washington, D. C. A white-flowered 
shrub, native to the mountains of Yunnan at an altitude of about 11,000 
feet. It should be tested as an ornamental in the South Atlantic and 
Gulf States, and on the Pacific coast. (Bell, Md.)

56826. PITTOSPORUM sp. From Yunnan, China. Collected by J. F. Rock, 
Agricultural Explorer. A shapely tree about 30 or 40 feet in height, 
with handsome foliage, and large terminal masses of cream-colored 
flowers followed by bright-red fruits. Probably tender north of southern 
Ohio. (Savannah, Ga.)

51877. POPULUS MAXIMOWICZII. Poplar. Presented by John Dunbar, Assistant
Superintendent, Department of Parks, Rochester, N. Y. A very fast-growing 
and stately tree native to China. It will succeed in the coldest portions 
of the United States on the poorest and driest soils. At all times it 
makes phenomenally rapid growth. Its leaves, which are handsomely crinkled 
like those of Rosa rugosa appear very early in the spring and remain longer 
in the autumn than those of almost any other deciduous plant. The tree 
is not attacked by borers or leaf-eating insects; it is highly recommended 
as a shade tree and windbreak generally, especially for the northwest 
plains country. (Bell, Md.)

59023. POTENTILLA sp. From Yunnan, China. Collected by J. F. Rock, 
National Geographic Society, Washington, D. C. An alpine plant, found 
at about 10,000 feet altitude, with trifoliolate leaves and large racemes 
of yellow flowers. Probably hardy except in the extreme north. (Bell, Md.)

59428. PRIMULA LITTONIANA. From Yunnan, China. Collected by J. F. 
Rock, National Geographic Society, Washington, D. C. A very handsome 
plant 2 to 3 feet tall found in swampy meadows at about 11,000 feet 
altitude. The deep indigo-blue flowers, with rich-carmine calyxes, are 
borne in long, densely packed spikes. For trial in mild-wintered regions 
having an abundance of moisture. (Bell, Md.)

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