634 JOURNAL OF THE ROYAL HORTICULTURAL SOCIETY. 



Pleione. By R. Schlechter [Orchis, vol. viii. pp. 72-80 ; 5 plates). 

 — These orchids are frequently grown in too warm a house, and are 

 not allowed sufficient rest after their period of growth. They require 

 plenty of drainage and Hght, and do well in shallow basins in a mixture 

 of leaf mould, sphagnum, and fibre. P. Bulhocodium is a native of 

 Yunnan and West Szechwan, and is found from 10,000 to 14,000 feet 

 above sea-level. Only one flower is borne on the stem, and it varies 

 in colour from red to white. P. Delavayi also comes from Yunnan at 

 an altitude of 7000 to 9000 feet. The flowers are purple. P. Forrestti 

 comes from Yunnan, where it is found some 6500 to 9500 feet above 

 the sea. The flower stem bears one bright orange-coloured flower 

 with brown marks. P. grandiflora is found in Yunnan in similar 

 surroundings to the above. It bears white flowers, slightly marked 

 with purple lines. P. Hookeriana is a native of the West Himalayas, 

 growing about 8000 to 11,500 feet above sea-level. The bell-shaped 

 flowers are white or pale pink, with yellow lip. P. humilis is found 

 in the Himalaya, Nepal, and Sikkim at an altitude of between 6500 and 

 6700 feet, growing on the mossy trunks of trees. The flowers are white 

 with yellow centres and violet-spotted lip. P. Lagenaria bears dehcate 

 violet flowers. The labellum is white or pink, with dark red spots on 

 the edge. It is a native of Burma and Assam. P. maculata, from the 

 Himalaya and Sikkim, is an epiphyte found on trees growing 1800 

 to 5200 feet above the sea. The white flowers are borne on dwarf 

 stems. The lip is spotted with yellow and red. P. pogonioides is 

 found on wet rocks 3000 to 4000 feet above sea-level in China (Hupeh 

 and Szechwan). The flowers are purple. P. praecox is found at a 

 height of 4000 to 7600 feet in Burma and the Himalayas. The stems 

 bear one or two flowers, violet, with yellow spots. P. Reichenhachiana 

 is a native of Burma and grows 1000 feet above sea-level. Each stem 

 bears a single flower of a violet colour ; the lip is white, with red marks • 

 P. Schilleriana, from Moulmein, also bears a single flower on each stem ; 

 the flowers are yellow, and the lip is splashed with purple or orange 

 spots. P. yunnanensis has pink flowers, and the labellum is streaked 

 with purple. — 5. E. W. 



Plum * French.' By U. P. Hedrick {U.S.A. Exp. Stn., Geneva, 

 New York, Bull. 385, 1914 ; col. pi.). — A Damson of great produc- 

 tivity and of good flavour. Can be eaten uncooked. A week later 

 than the ' Shropshire.' Origin unknown, but probably a French 

 variety. — E. A. Bd. 



Poisonous Solutions, Antagonism of. By W. J. V. Osterhout 

 [Bot. Gaz. Iviii. pp. 178-186, Aug. 1914, 4 figs. ; pp. 272-276, 

 Sept. 1914, 3 figs.; pp. 367-37i> Oct. 1914; 3 figs.).— The author 

 explains methods of determining the antagonistic effect, if any, of 

 two toxic solutions. 



The growth of parts of a plant not in immediate contact with a 

 poisonous solution is often deceptive. Thus in solutions of copper 



