NOTES AND ABSTRACTS. 



497 



in sterilized soil developed nodules which contained no fungus, and 

 these nodules contained no stored-up starchy or nitrogenous food 

 material as the case with those in which the fungus is present. 

 Tests for proteolytic enzymes in the nodules have not yet been made. 

 Since nodules are formed without the fungus, the real problem in 

 growing in nitrogen-free cultures is to test the comparative ability of 

 plants with fungus-bearing nodules and those with nodules lacking the 

 fungus to thrive under such conditions. It is thought that the nodules 

 are possibly air roots which possess the additional function of assisting 

 the palm to secure a larger supply of nitrogenous food material. — A. P. 



Rosa omeiensis (Bot. Mag. tab. 8471). — Western China. Family 

 Rosaceae, tribe Roseae. Shrub, 3-10 feet high. Leaves ij-2j inches 

 long, 9-13 foliolate. Flowers white, with usually 4 petals. Fruit 

 ellipsoid, bright red. — G. H. 



Rosa sertata (Bot. Mag. tab. 8473). — China. Family Rosaceae, 

 tribe Roseae. Shrub, 3-7 feet high. Leaves if-4 inches long. 

 Flowers rose or rose-purple, 2-2 J inches across. — G. H. 



Rose Distillation for Scent. By Joseph Knight (Jour. Dep. 

 Agr. Vict. Aug. 1912). — In the South of France some scent distilleries 

 can handle 150 tons of roses a day. The petals are stripped from the 

 calyx, boiled in a still for about two hours, within twenty-four hours 

 of gathering; the distillate is Rose water. For perfume extraction 

 rose petals are boiled in olive oil ; after twenty-four hours the petals 

 are drawn out and pressed ; the same process is repeated with fresh 

 petals until the oil is sufficiently impregnated with the scent of the 

 flower, when it is stored, and the essence extracted by some highly 

 rectified solvent. This enfleurage and maceration system is very 

 popular in France, and a very considerable amount of pomade is 

 made and used in this fotm. — C. H. H. 



Rose 1 Madame Edouard Herriot.' By G. T. Grignan (Rev. 

 Hort. Nov. i, 1912, p. 496 ; coloured plate). — This represents a very 

 beautiful Rose of a deep rich salmon colour, finely double, and of good 

 form, with attractive buds (' Caroline Testout 1 X ' Soleil d'Or '). 

 Very robust and hardy, with erect branches, raised by N. Perner 

 Ducher. (The ' Daily Mail ' Rose.)— C. T. D. 



Rose Mildew (Agr. Gaz. N.S.W. p. 1042). — This disease is 

 checked by dusting with flowers of sulphur mixed with one-third 

 its volume of lime, or spraying with lime-sulphur, potassium sulphide, 

 or 1 part of sulphuric acid in 1500 parts of water. — S. E. W. 



Ruellia Harveyana {BU. Mag. tab. 84S5). — Mexico. Family, 

 Acanthaceae, tribe Ruellieae. Herb, perennial. Stems slender. 

 Leaves 2-3 inches long. Flowers, corolla pale lilac, 2 inches across. 



G. H. 



