222 JOUKNAL OF THE ROYAL HORTICULTUEAL SOCIETY. 



figs, i.-iii.). — In the plant found spermatogenous filaments grew within the 

 " nucule " or archegonium, chiefly from the transition-cells {Wendezellen) 

 below the oocyte. — M. H. 



Hibiscus Manihot {Malcacece), China and Japan {Bot. Mag. 

 tab. 7752). — An annual with yellow flowers having a purple eye, G in. 

 diameter, grows from 4 to 9 ft. in Temperate House, Kew. — G. H. 



Hyacinth Disease, Wakker's {U.S. Dep. Agri. Bull 2G ; 1901).— 

 Mr. Erwin F. Smith gives a very full and detailed account of the 

 Pseudomonas hyacinth i (Wakker), Erw. Sm., illustrated by a plate showing 

 cultures and characteristic symptoms of the disease. The organism is 

 yellow and rod- shaped, and can swim readily by means of a long polar 

 flagellum. It enters the Hyacinths either through wounds on the leaves or 

 blossoms (probably carried by insects), and multiplies in the vascular 

 system, filling the vessels, especially those of the bulb, with a bright 

 yellow slime consisting of bacteria. It can be recognised by the yellow 

 strips on the leaves, or yellow dots, corresponding to the xylem vessels of 

 the bulb-scales. Sometimes the disease is propagated through the young 

 bulb being infected by the diseased bulb from which it springs. The 

 paper gives records of nineteen series of inoculations and experiments, 

 and should be remembered in any case of Hyacinth disease. —G. F. S. E. 



Hybrid Stocks, with respect to the Limits of the Men- 

 dellian Law. By C. Correns (Bot. Cent. 1900, 84, 97 113).— In experi- 

 ments w^ith JSIatthiola incana and M. glabra, this investigator found 

 that it was only in some respects that Mendel's Law of Separation 

 was confirmed, its application being therefore limited. As we have only 

 a brief abstract before us in the Bot. Zeit. 1901, G, p. 86, the paper itself 

 must be referred to for full details. — C. T. D. 



Hydranofea Hortensia * Jeanne d'Arc' By H. Dauthenay {Bev. 

 Hort. p. 66 ; tig. 19 ; January 1901). — Sport from ' Thomas Hogg ' ; pure 

 w^hite, brownish-black stems and stift" habit. — C. T. D. 



Hymenanthera crassifolia. By S. Mottet {Ber. Hort. p. 115 ; 

 2 figs. ; January 1901). — A Cotoneaster-jike wall plant, not tender as 

 reputed. White or spotted berries, persisting through winter. — C. T. D. 



Hymenocallis SChizostephana (AmarylUdccB), Brazil {Bot. Mag. 

 tab. 7762.) — This bears fragrant fiowers with a long, slender, greenish 

 tube and linear white lobes. It flowered in a warm greenhouse in June. 



G. H. 



Hypericum, the genus. By Angiolo Pucci {Bull. d. B. Soc. 

 Tosc. Ort. 5, p. 145 ; May 1901). — Interesting description in brief of the 

 European species of this genus. — W. C. W. 



Illicium laurifolium. By Ed. Andre, with figure {Bev. Hort. 

 p. IT; fig. 1 ; January 1901). — Semi-shady culture recommended in 

 non-calcareous peaty soil. — C. T. D. 



