882 JOHiNAL OF THE ROYAL HORTICULTURAL SOCIETY. 



occur in some, large Citrus -like single crystals in a few species, while 

 si i ml 1 solitary crystals are common. The arrangement of the details is 

 adapted to the recognition of species by the anatomy alone. — G. F. S.-E. 



Rhododendron ciliicalyx. By C. Bonstedt (Die Gart. No. 21, 

 p. 2 If), February 20, 1904). — The seeds of this new Chinese species were 

 collected by the Abbe Delavay in 1883 ; the seedlings have since flowered. 

 The ovate leaves are scabrous on the surface and glaucous beneath. The 

 flowers are white, tinged rose or violet, and have a ciliated calyx : they are 

 very fragrant. — G. B. 



Ribes alpinum Leaf-spot. By R. Laubert (Nat. Zeit. Land-Forsi. 

 ii. pp. 60-58; figs. ; 1004). — Description of a new leaf-spot fungus on 

 Bibes alpiniim, now cultivated in parks and gardens. The fungus, 

 Cild'osjioriam variabile Laub. is distinct from other species of this genus 

 which attack Black Currant and Gooseberry ; the illustrations show a leaf 

 attacked, and details of structure of the fungus. — W. G. S. 



Ribes leptanthum (Gartmflora, Aug. 1, 1904, p. 408). — An introduc- 

 tion from the Colorado mountains, whore it grows at an altitude of 7,000 

 feet. It is a dwarf shrub in height and of an elegant habit of growth. It 

 produces pink and white flowers at the end of April and the beginning of 

 May, these being followed by small black berries in the early part of 

 August.— a 0. B. N. 



Ricciocarpus natans, The Life History of. By J. F. Garber 



[Boh Gaz. xxxvii. No. 8, p. 167 ; with 4 figs, and 2 plates). — This consists 

 of a complete description under the following beads : The Thallus, Sex 

 Organs, Fertilisation, Sporophyte, and Biology, with general summary of 

 results. — G. II. 



Rice. By W. 0. Stubbs, W. R- Dodson, and C. A. Brown (U.S.A. 

 Exp. Sin. Louisiana, Bull. No. 77,2nd series, 1904 ; plates). — An addition 

 to the already existing official literature on Rice-growing, which is every 

 yoar becoming a more important industry in Louisiana. The bulletin was 

 published before the gathering of the 1908 crop, which it estimates at 

 probably 800,000,000 lb. of clean Rice, and there are at least four million 

 more acres of land in the State which could be devoted to the crop. 



In districts which are too far from streams for irrigation by canals, 

 artesian wells are dug, and the water is pumped over the land. A great 

 part of this bulletin is taken up with a description of the worst of the 

 many weeds which invade the Rice, and which seem so far an almost 

 unavoidable result of some of the processes of its culture ; but the writer 

 suggests various fresh methods of keeping them under, and points out the 

 necessity of cleaning, not only the fields themselves, but the waste places 

 in the neighbourhood and the banks of the canals, from where the noxious 

 seeds are carried in bushels into the cultivated ground during the yearly 

 irrigation. 



An account is given of the preparation of the rice for market, and 

 tables of the various degrees of nutrition and digestibility of its waste 



