NOTES AND ABSTRACTS. 



359 



that there is a wide range of susceptibihty among cruciferous plants, 

 not only among the genera, but among the species in the genera and 

 among the varieties in the species. Lepidium campestre (a common 

 weed) showed 38.7 per cent, clubbed, while L. sativum was free. The 

 black Spanish radish showed 65.6 per cent, clubbed, Giant radish 16.9 

 per cent. * Eock Eed ' cabbage showed a susceptibility of 100 per cent. , 

 ' Hollander ' of 73.5 per cent. This raises the question of an immune 

 variety of cabbage. — F. J. C. 



CoelOgryne. By E. Wagner {Oestr. Gart. Zeit. vol. vii., pt. i., 

 pp. 2-7; 2 figs.). — The species of Coelogyne discovered in 1893 are 

 C. tenuis and C. horneensis (neither of any horticultural importance), 

 C. Clarlcei, G. Sanderae, brown and orange, G. MacDonaldii from the 

 New Hebrides, pale green with brown spots, G. Mossiae from the 

 Nilgiris, with beautiful white flowers, G. longihracta from Perak, with 

 large fragrant yellow flowers. 



C. Swaniana and G. papillosa were brought to notice in 1894. The 

 latter grows on Kin a Balu in Borneo, 11,000 feet above sea-level. Four 

 species were added to the list in 1895 — ^viz., G. carinata from New 

 Guinea, G. lamellata, a native of Upola, and G. lycastoides, with large 

 green flowers, and G. Veitchii, with white flowers, both from New 

 Guinea. 



In 1896 the insignificant G. prasina was found on Kedah Peak, 

 about 4000 feet above the sea; also G. casta- from Selangor, with large 

 white flowers with yellow markings; G. pachyhulhon from Siam, and 

 G. quadrangularis found growing on trees in Perak. 



Two new species were discovered in 1898 — G. zeylanica and 

 C. pulchella. The latter has numerous white and brown flowers. 



S. E. W. 



Conifers, Layering- among-. By WiUiam S. Cooper {Bot. 



Gaz. pp. 369-379, Nov. 1911; 1 fig.).— The author describes and 

 figures cases of layering of Abies halsamea, as found in Isle Eoyale, 

 Lake Superior. In one case a fifth descendant, by layering, was dis- 

 covered. It occurs in large mature trees as well as in small and young 

 specimens. Black Spruce, White Spruce, Tamarack, and Arbor Vitae 

 were found to show layering. 



The author states that it is most common at the Arctic and moun- 

 tain timber lines. The author considers that it is of importance in 

 natural forest conditions. — G. F. S. E. 



Corokia Cotoneaster {Bot. Mag. t. 8425). —New Zealand. 

 Family Gornaceae; tribe Gorneae. Shrub, 4-7 feet high. Leaves in 

 groups of threes, 5-6 lin. long; flowers axillary, solitary, ^ inch across, 

 yellow ; fruit drupe-hke, red, 5 lin. long.— G. H. 



Cotton Wilt and Root-knot, Control of. By W. A. Orton 

 and W. W. Gilbert {U.S.A. Dep. Agr., Bur. PI. Ind., Girc. 92, 

 1912). — Cotton wilt is due to a fungoid disease present in the soil, and 

 root-knot to the attacks of an eelworm which forms knots in. the roots. 



