ABSTRACTS. 



231 



Nymphaea caerulea, Savi^^my. N. scutifolia, \). C. N. pul- 



Cherrima (Amer. (iard. xxii. 317, p. 43; fi^,'. 10 ; 19/1 /lOOl).— An 

 excellent photograph of these three species, with a short description of 

 the former two, which, it appears, are frequently confounded. — C. C. II. 



Oaks of America (Rev. Hort. iJeUje, March 1901). — Observations 

 and a plate with leaves of 20 species. They are continued in the May 

 number, with a plate containing figures of 3S species. — G. II. 



Ocneria dispar (Der Schioamimjdnner). By \)r. Arnold Jacobi 

 {(Jarlenflora, p. 104 ; 15/3/1901 j. — Description of the pest and the best 

 method of destroying same. — C. E. S. 



OdontOgrlossum crispum. By A. Sandhack (Die Gart. 16, p. 181 ; 

 two figs). — The author gives an interesting account of his experience in 

 collecting this Orchid on the Cordilleras of Southern Colombia, especially 

 in the Pacho district, where it has been well nigh exterminated. — A. II. K. 



Of.OntOg'lossum crispum, ' Franz Masereel ' [Garden, p. 329 ; 

 11/5/1901;.— Fig. of this beautiful and distinct plant.—//. /. C. 



Odontog'lossum loochristyense Rochfordlanum and 0. C. coun- 

 douense. By 11. J. Chapman (Garden, pp. 100 and 101 ; 9/3^1901 ; 

 figs). — These natural hybrids prove that the parent species, 0. crispum 

 and 0. triumpham, grow together in certain districts, instead of being, 

 as previously supposed, divided by wide areas in their native habitats. 



//. /. C. 



Onions, Fertilisers for. By J. J. Willis (Gard. Mafj. 2174, p. 

 191 ; 30/3/1901j. — Instructive note on manuring Onions, and particu- 

 larly upon the relative merits of " commercial fertilisers," and what is 

 termed natural manure. The note is worthy of attention, as are all the 

 contributions from this well-known authority on agricultural chemistry. 



IF. G. 



Orchids, Seedling. By Gustav Bartsch {Garten/lcra, p. 115 ; 

 l/3/1901j. — Cultural instructions. Lielias and Cattleyas recommended 

 as more easily yielding certain results. — C. E. S. 



Ornithophilous Flowers. By E. Worth (Gard. Chron. p. 801 ; 

 11/5 1901). —An account of these flowers in Eastern Tropical Africa. 



G. S. S. 



Orris-root (Iris floreniina). Anon (Neiv Zealand Dept. oj Ayricult. 

 8th Keport, pp. 296-8 ; 1900).— A quantity of the white Florentine Iris 

 {I. floreniina) has been obtained through Barr A: Sons, King Street, W.C., 

 and planted at Momohaki, New Zealand, for cultivation of the Orris root. 

 The plants were obtained from Italy, and supplied at a cost of £3 per 

 thousand. A STuall quantity of the less abundant Iris pallida, together 

 with an unnamed species from Austria, was also imported for the same 

 purpose, but it seems that these latter were not so easily obtained. — li. N. 



