ABSTRACTS. 



319 



Habenaria Lugardii. By Sir J. D. Hooker (Bot. Mag. tab. 7798).— 

 Nat. ord. Orchidece, tribe Ophrydece. Native of Bechuanaland. It 

 bears two large orbicular leaves and racemes of white flowers, having 

 spurs some 8 inches in length. It flowered at Kewin February 1899. 



G. H. 



Haemanthus diadema. By A. V. D. H. (Bev. Hort. Beige, 



xxviii. No. 1, p. 13; with col. pi.).— It bears a large umbel 8 inches 

 across in full flower of scarlet flowers. — G. H. 



Hazels, The Witch. By D. K. (Journ. Hort. p. 180; Feb. 27, 

 1892). — Four kinds of this genus (Hamamelis) are described, and as they 

 flower in winter their bright yellow at that season is attractive and 

 ornamental. — G. W. D. 



Heating: Greenhouses, Early Treatises on. By W. Eoberts 

 (Gard. Chron. No. 791, p. 121 ; 22/2/1902).— In this article the history 

 of heating plant houses is dealt with, and the author quotes a number of 

 books &c. which appeared at the end of the eighteenth and the begin- 

 ning of the nineteenth century, in each of which apparently a different 

 system of heating was advocated. One of the earliest papers in which 

 heating greenhouses is mentioned is one published in the " Philosophical 

 Transactions " in 1694 ; but it seems that as late as 1721 glass was not 

 used in the construction of greenhouses. — G. S. S. 



Helenium Hoopesii. By S. Mottet (Bev. Hort. p. 109 ; 1 wood- 

 cut ; March 1, 1902). — Highly recommended as a robust hardy garden 

 flower, large yellow multi-rayed stars, floriferous, about three feet high. 



C. T. D. 



Helianthus, Floral Transformations of. By J. Fr. Favard 

 (Bev. Hort. pp. 139-112 ; March 16, 1902).— Seven woodcuts, mainly 

 illustrating distinct varieties of H. cucitmerifolius, single, semi-double, 

 double, and dwarf. An interesting series. — C. T. D. 



Heliehrysum, Some African Species of. Anon. (Gard. Chron. 

 No. 784, p. 4, fig. 1 ; 4/1/1902). — In the Gardeners' Chronicle of Nov. 10, 

 1900, a new species belonging to this genus, named H. Gulielmi, by Prof. 

 Engler, was figured. Prof. Engler in his paper mentioned another 

 species (without naming or describing it) as allied to H. formosum. 

 This is supposed to be the species now figured, which, however, is appa- 

 rently not a new species, but a variety of H. Gulielmi. — G. S. S. 



Heliehrysum Volkensii. Anon. (Gard. Chron. No. 794, p. 169, 

 fig. 50; 15/3/1902). — This African species is a native of the Kilma-njaro 

 Mountain, where it grows in "the highest zone of vegetation " : it is a 

 plant of shrubby habit, the stems and branches densely covered with 

 white shaggy hairs. The flowers are about 1J inch in diameter, the 

 outer bracts are bright rose-coloured, the iuner ones white. It was 

 flowered by Mr. Gumbleton. — G. S. S. 



Hellebores. By J. W. Barr (Journ. Hort. p. 205 ; March 6, 1902).— 

 A portrait is given of Helleborus colchicus. The stalked Hellebores of the 



