580 



JOURNAL OF THE EOYAL HORTICULTURAL SOCIETY. 



Schomburg'kia tibieinis, Batem. By 0. Massias {Die Gart. p. 9 ; 

 5/9/1901). — Description and cultural notes as well as history.— G. ii. 



Scilla campanulata * Rose Queen ' {Rev. Hort. p. 8^7 ; August 

 1901). — Raised by E. Krelage Sc Son, Haarlem. Bulbs produce five to 

 eight floral spikes, bearing eight to twenty-five pendulous flowers, bright 

 pink, tinged with lilac. — C. T. D. 



Scots Pine, Leaf Disease of Young Trees. By C. von Tubeuf 



{Gartcnflora, ]). 395; 1 8 1901).— One of the most dangerous diseases 

 of young Scots Pines, is caused by the fungus Lophodermiam Pinastri, 

 whose structure is described. The fungus attacks the leaves, producing 

 brownish spots upon them ; they soon dry up and fall oft". In bad cases 

 the trees die, and strong plants may be very much weakened by similar 

 destruction of the assimilating organs. The disease is best fought by 

 spraying the trees with Bordeaux mixture between the middle of July and 

 the end of August. — /. P. 



Selaginella apus and S. rupestris ; Study of the Sporangia and 

 Gametophytes. By Florence M. Lyon {Bot. Gaz. vol. xxxii. p. 124 ; No. 2, 

 plates v.-ix.). — Author treats of the origin and development of sporangia, 

 megaspores, female of gametophyte, archegonia, fertilisation, microspores, 

 Scc.—G. H. 



Selaginella, Sporangien, Sporenverbreitung und Bluthen- 

 bildung bei. Archegoniaten-Studien IX. By K. Goebel {Flora, 

 vol. Ixxxviii. Pt. 2, p. 207- 228 ; March 1901).— The expulsion and active 

 scattering of the spores are described and explained, the megaspores being 

 projected to the greater distance. The ''flowers" (spikes) are moreover 

 proterogynous and scatter the spores at dift'erent times ; and in some 

 cases the microspores germinate and form sperms too early to fertilise the 

 archegonia of megaspores of the same " flower." The " flowers" also are 

 studied in the morphological relation of their bracts to the phyllotaxy of 

 the basal vegetative part of the stem. — M. H. 



Selandria {Eriocampa) adumbrata, King, syn. Tent livedo, Ord. 

 Tenthredinida. By H. Wolanke {Die Gart. p. 584; 7 9/1901).— A 

 garden pest doing great damage as larvae to fruit-trees, principally to 

 Cherry, Pear, Apple, and Apricot trees, feeding on and destroying the 

 leaves so as to almost denude the trees. Appeared in great numbers in 

 the South of Germany during the past summer. — G. B. 



Sequoia sempepvirens, Endl. By Prof. G. J. Peirce. " studies on 

 the Coast Redwood," Proc. Calif. A'cad. Sci. iii. Bot. 2, pp. 83-106, pi. 14, 

 1901 {Bot. Gaz. xxxi. 442 ; No. 6). — The author treats of the develop- 

 ment of suckers in this tree. In the tendency of the suckers to fasciation, 

 he confirms Frank's view that it is in consequence of an excess of food- 

 substance in available form. Albinism of the suckers is not uncommon, 

 differing much from green suckers. The author attributes it to in- 

 sufficient warmth. If a sucker begins white, it remains so, no matter 

 how favourable the conditions may be for the development of a green 



