Tl-L ■"^-. -^ .1 ».-j — 



21 



that the growth rings of Sequoia arc not an index of age. His 

 measurement proved tliat they could be relied on. 

 Botanical Laboratory : Plan for. Lillie J. Martin. (Bot. Gaz- 

 ette, xii., p. 273). 



Botany of the Roraima Expedition of 1S84. ^Y E. F. Im 

 Thurn. Part I. — List of the Species of Plants collected and 

 Determinations of those that are new. Prof Oliver. Part 

 II. (Trans. Linn. Soc., London, ii., pp. 249-300. Plates 

 xxxvii-lvi). 



Roraima is a mountain of Guiana which was ascended for 

 the first time by E. F. Im Thurn. The Roraima district is iso- 

 lated in its botanical character, and has afforded fifty-three new 

 species and three new genera, which are described and figured in 

 this monograph. The contributors include such specialists as 

 Prof. Oliver, J. G. Baker, G. S. Jenman, H. N. Ridley, Dr, 

 Engler, Mr. Mitten, and others. The region has been but little 

 visited, and only in certain months of the year (November 

 and December). Owing to the excessive dampness of the cli- 

 mate and the difficulty experienced in drying plants, fewer speci- 

 mens were preserved than would have been under more favorable 

 conditions.- The following foot-note by the Secretary of the 

 Linnaean Society explains itself. 



'* During the delay requisite to prepare the plates, Mr. Im 

 Thurn has taken the unprecedented course of printing the whole 

 of the unrevised draft at Demerara in Timehri the 



Journal 



the Royal Agricultural and Commercial Society of British 

 Guiana, vol. v., pp. 145-223, Dec, 1886), thus forestalling the 

 present publication. Sec. L. S." 



?/ North 



Mr. J 



liich may be obtained from him at 447 E. 57th St., 



New York City. 



Coinpositce, — Fertilisation of Flowers in. Thos. Meehan. (Gard* 



Month., xxix , pp. ^7Z, 374). 



Referring to a series of recent articles in the ''Country Gentle- 

 man/' Mr. Meehan takes occasion to rebuke the loose w^ay of pop- 

 ular writers of ascribing all fertilization to cross pollination, the 

 Ccmposita^ being for the most part self-fertihzed. He furtlier 



