374 JOURNAL OF THE ROYAL TTORTTCTUiTTTRAL SOCIETY. 



the chnrncters, and the distribution of Sphenostylis stenocarpa, wliicli 

 previous authors had referred either to the genus Dolichos or Vigna. 

 The plant appears to have a wide distribution over the greater part 

 of Africa, and is often cuhdvated by the natives for its edible, turnip- 

 Hke tubers. 



Other species of the genera Splienostylis, Doliclios, and Vigna 

 are described — viz. S. ohtusifolia (Harms) n. sp., Doliclios Seineri 

 (Harms) n. sp., Vigna Dinieri (Harms) n. sp., V. slenophylla 

 (Harms) n. sp. 



Harms further mentions several species of Eriosema which have 

 tuberous roots; also Bauliinia esculenta and B. Bainesii develop fleshy 

 roots which are eaten by the natives. — R. B. 



Leptospermum scoparium var. Nichollii {Bot. Mag. t. 8419). 



— New Zealand. Family Myrtaceae; tribe Leptospermeae. Shrub, 

 10-18 feet. Leaves lanceolate, 4 inches long; flowers solitary on lateral 

 twigs, f inch across ; petals carmine. — G. H. 



Ligrht in Relation to Tree Growth. By Eaphael Zon and 

 Henry S. Graves {U.S.A. Dep. Agr., Forest Service, Bull. 92; 

 June 30, 1911). — The light requirements of our forest trees have 

 received but scant attention in any country. In this Bulletin the idea 



is to bring together the principal facts with regard to the part which 

 light plays in the life of the forest, and the methods of measuring and 

 recording them. — A. D. W. 



Lilium Sargrentiae. By E. IT. Wilson {Gard. Chron. p. 385; 

 June 15, 1912). — Description and Latin diagnosis of this new species 

 from Szechuan, China. Allied to L. myriopJiyllum, Ij. sulphureum, 

 and L. Brownii. Its large, purple bulb with acute summit forms its 

 most marked character of distinction from these others. — E: A. B. 



Lycium pallidum {Bot. Mag. t. 8440).— South U.S.A. and North 

 Mexico. Family Solanaceae ; tribe Atropeae. Shrub, 3-4 feet high. 

 Leaves clustered, ,1-1-| inch long; flowers solitary or in pairs; corolla 

 tube f inch; border ^ inch across, pale greenish-yellow. — G. H. 



Mag'nolia Kobus {Bot. Mag. t. 8428). — Japan. Family Mag- 

 noliaceae; tribe Magnolieae. Tree reaching 70-80 feet in height. 

 Leaves obovate, 4-7 inches long; flowers 4 inches across, solitary, pure 

 white with a purple median line outside; filaments purple. — G. H. 



Mag'nolia salicifolia {Gard. Chron. p. 222, April 6, 1912; with 

 fig.).- — Eecorded as flowering at Kew, probably for the first time out 

 of doors in Britain. — E. A. B. 



Mahogany, Columbian. By George B. Sudworth and Clayton 

 D. Mell {U.S.A. Dep. Agr., Forest Service, Circ. 185; Aug. 3, 1911).— 

 Columbian Mahogany, so called because it comes only from Columbia, 

 is probably the best imitation of real mahogany that has yet been placed 



