42 Botanisches Centralblatt. 



national geographic Society. I. The recovery of Vegetation at 

 Kodiak. (Ohio Journ. Sc. XIX. p. 1—57. 32 f.) 



Gundersen, A. 1918. A sketch of plant Classification from Theophrastus 

 to the present. [Cont.]. (Torreya. XVIII. p. 231—239.) 



Harms, H. 1918. Araliaceae andinae. (Rep. Spec. nov. XV. p. 245—254.) 



Harper, R. M. 1918. A phytogeographical sketch of southern Maryland. 

 (Journ. Washington Ac. Sc. VIII. p. 581—589.) 



Harper, R. M. 1918. A sketch of the forest geography of New Jersey. 

 (Bull. geol. Soc. Philadelphia. XVI. p. 107—125. 1 m. 5 f.) 



Harshberger, J. W, 1918. American heaths and pine heaths. (Brooklyn 

 bot. Card. Mem. I. p. 175-186. 8 f.) 



Hassler, E. 1918. Solanacea paraguariensia vel minus cognita. II. 

 (Rep. Spec. nov. XV. p. 217-245.) 



Heimlich, L. F. 1918. The trees of White County, Indiana with some 

 reference to those of the State. (Proc. Indiana Ac. Sc. 1917 [1918]. 

 p. 387—471. in.) 



Hoffmann, C. 1918. Pflanzenatlas nach dem Linne'schen System. 

 Handbuch zur Einführung in die heimische Flora. 5. Aufl. umge- 

 arbeitet von E. Dennert. (Stuttgart, Schweizerbart. 1918. 4^. XII, 

 188 pp. 74 T. 613 F.) 



Hofmann, J. V. 1918. Seed vitality as a factor in determining forest 

 types. (Amer. Forester. V. p. 13—16. 5 pl.) 



Holland, W. J. 1918. Shall writers upon the biological sciences ague 

 to ignore systematic papers published in the German language 

 since 1914? (Science. N. S. XLVIII. p. 469-471.) 



Holmes, J. S. 1918. Extension of the ränge of Prunus umbellata into 

 North Carolina. (Journ. Elisha Mitchell Sc. Soc. XXXIV. p. 

 126-129. 2 pl.) 



House, H. D. 1917. The Vegetation of the eastern end of Oneida 

 Lake. (Bull. New York State Mus. 1917. 197. p. 61—71. f. 4—12.) 



Hutchinson, A. H. 1918. Limiting factors in relation to specific ranges 

 of tolerance of forest trees. (Bot. Gaz. LXVI. p. 465—493. 7 f.) 



Johnston, I. M. 1918. A few notes on the botany of southern Cali- 

 fornia. (Bull. S. California Ac. Sc. XVII. p. 64—66.) 



Johnston, I. M. 1918. Some undescribed plants from southern Cali- 

 fornia. (Bull. S. California Ac. Sc. XVII. p. 63—64.) 



Jungersen, H. F. E. 1918. Et besog paa Bermudas-0erne. (Geogr. 

 Tidskr. VIII. p. 289—305.) 



Kallsreuth, P. 1917. Die Vegetationsverhältnisse des Kreises Berent 

 mit Bezugnahme auf die wichtigsten grundlegenden geographi- 

 schen und ökologischen Faktoren. (Ber. westpreuss. bot.-zool. Ver. 

 XXXIX. p. 29-68.) 



Keeler, H. L. 1917. The wayside flowers of sumraer. (New York, 

 1917. XIII, 288 pp. in.) 



Knowlton, C. H. 1918. Plants from South Weymouth, Massachusetts. 

 (Rhodora. XX. p. 115.) 



Knowlton, C. H. and W. Deane. 1918. Reports on the flora of the 

 Boston district. XXVI. (Rhodora. XX. p. 15—18.) 



Knowlton^ C. H. and W. Deane. 1918. Reports on the flora of the 

 Boston district XXVII. (Rhodora. XX. p. 55—59.) 



Koorders, S. H. 1918. Abbildung und Beschreibung von Rafiiesia 

 atjehensis aus Nord-Sumatra. (Bull. Jard. bot. Buitenzorg. 3. I. 1. 

 p. 77—81. 3 T.) 



Koorders, S. H. 1918. Beitrag zur Kenntnis der Flora von Java. N^ 9. 

 Beschreibung und Abbildung von einer neuen Art von Prunus 

 aus West-Java. (Bull. Jard. bot. Buitenzorg. 3. I. 1. p. 84—85.) 



