Neue Litteratur. 109 



Nakai, T. 1915, Praecursores ad floram sylvaticam Koreanam. I. 



:Aceraceae). (Bot. Mag. Tokyo. XXXIX. p. 25—30.) 

 Nakai, T. 1915. Praecursores ad Floram Sylvaticam Koreanam. II. 



(Betulaceae). (Bot. Mag. Tokyo. XXIX. p. 35—47.) 

 Nichols, G. E. 1915. The Vegetation of Connecticut. IV. Plant socie- 

 lies in lowlands. (Bull. Torrey bot. Club. XLII. p. 169—217. 15 f.) 

 Norton, J. B. 1915. Spring flowers in the fall. (Journ. Washington 



Ac. Sc. V. p. 285—287. 1 f.) 

 Nossotovsky, A. 1915. Note sur une nouvelle esp^ce du genre Xan- 

 thium. (Bull. Jard. imp. bot. Pierre le Grand. XIV. p. 454. Russe 

 et frang.) 

 Olivier, J. 1915. Kinderen der wildernis. (Teysmannia. XXVI. 



p. 35—42.) 

 Oliver, W. R. B. 1915. The Vegetation of White Island New Zealand. 



(Journ. Linn. Soc. XLIII. p. 41 — 48.) 

 Osborn, T. G. B. 1915. Types of Vegetation on the coast in the neigh- 



bourhoad of Adelaide, South Australia. (Rep. 48th Meet. british 



Ass. Adv. Sc. Australia, 1914. London, 1915. p. 584-585.) 

 Osterhout, W. J. V. 1915. The value of antagonism. (Science. 2. XLI. 



p. 255-256.) 

 Pammel, L. H. 1915. Introduced plants of the Clear Creek canon, 



Colorado. (Proc. Iowa. Ac. Sc. XXI. p. 119—121. 2 pl.) 

 Pammel, L. H. and C. M King. 1915, Weed survey of Steng County, 



Iowa. (Proc. Iowa, Ac. Sc. XXI. p. 115—118. pl. 9-14.) 

 Parish, S. B. 1915. Notes on some southern California plants. (Bull. 



S. California Ac. Sc. XIV. p. 12-16.) 

 Parish, S. B. 1915. Observations in the Colorado desert. (Plant World. 



XVIII. p. 75—88.) 

 Parish, S. B. 1915. The Whitewater sands. (Muhlenbergia. IX. p. 



133—139. 3 pl.) 

 Pau, C. 1914. .Sobre algunas plantas menorquinas. (ButU. Inst, cata- 



lana Hist. nat. 2. XI. p. 135—142.) 

 Pearson, H. H. W. 1915. List of plants collected in the Percy Sladen 



Memorial Expeditions 1908—9, 1910—11. (Ann. South. African Mus. 



IX. p. 193—272. 2 pl.) 

 Pellegrin, F. et J. Vuillet. 1914. Bombax nouveaux du Moyen-Niger. 



(Not. syst. III. p. 88—91.) 

 Phillips, E. P. 1915. A contribution to the knowledge of the South 



African Proteaceae. (Ann. South African Mus. IX. p. 273—276.) 

 Pöble, R. 1915. Especes et formes nouvelles et critiques du Draba 



L. de l'Asie. I. (Bull. Jard. imp. bot. Pierre le Grand. XIV. p. 



464—474. Russe et frang.) 

 Prain, D 1915. Curtis' Botanical magazine. XI. N« 124, 125 and 126. 

 Prain, D. 1915. Some additional species of Meconopsis. (Kew. Bull. 



1915. p. 129—177. 2 pl.) 

 Pugsley, H. W. 1915. British forms of Hypericum humifusum and 



H. linariifolium. (Journ. of Bot. LIII. p. 162—170.) 

 Read, A. D. 1915. The flora of the Williams division of the Tusayan 



national forest, Arizona. (Plant World. XVIII. p. 112—123.) 

 Reinecke, K. L. 1914. Flora von Erfurt. Verzeichnis der im Kreise 



Erfurt und seiner nächsten Umgebung beobachteten Gefässpflan- 



zen. (Jahrb. kgl. Ak. gemeinütz. Wiss. Erfurt. 1914. 283 pp.) 

 Reinke, J. 1915. Beitrag zur Kenntnis der Dünenbildung in der 



Sahara. (Bot. Jahrb. LIII. p. 1—8. 3 T.) 

 Ridley, H. N. 1915. Plants of Koh Samui and Koh Pennan. (Journ. 



Fed. Malay. States Mus. V. p. 158—168.) 



