LITERATURE 385 



HACKEL, E. 1890. liber einige Eigentiimlichkeiten der Graser trockener Klimate. 



Verb. Zool.-Bot. Ges. Wien, x\, 

 HACKEL, E. 1866. Generelle Morphologic. Berlin. 



1890. Planktonstudien. Jena. 



1891. Planktonstudien. Jena. Zeitschr. f. Naturw., xxv. 

 HANN, J. 1897. Handbook of Climatology. Engl. Ed., New York, 1903. 



1901. Lehrbuch der Meteorologie. Leipzig. 



HANSEN, E. 1881. Sur le Saccharomyces apiculatus et sa circulation dans la 



nature. Compt. Rend. Lab. Carlsberg, i, 3. 

 HANSTEEN, B. 1892. Algeregioner og Algeformationer. Nyt. Mag. f. Naturvid- 



skaben, xxxii. 

 HANSTEIN, R. 1868. Uber die Organe der Harz- und Schleimabsonderung in 



den Laubknospen. Bot. Zeitg., xxvi. 

 HARSHBERGER, J. W. 1897. The vegetation of the Yellowstone hot springs. 



Amer. Jour. Pharm., Ixix. 



1900. An ecological study of the New Jersey strand flora. Proc. Acad. 



Nat. Sci. Philad., lii. 



1901. An ecological sketch of the flora of Santo Domingo. Ibid. liii. 



- 1902. Additional observations en the strand flora of New Jersey. Ibid. 

 liv. 



1903. An ecological study of the flora of mountainous North Carolina. 



Botan. Gazette, xxxvi. 



1904. A phy to-geographic sketch of extreme south-eastern Pennsylvania. 

 Torrey Bull., xxxi. 



1905. The plant formations of the Bermuda Islands. Proc. Acad. Nat. 



Sci. Philad., Ivii. 



1905. The plant formations of the Catskills. Plant World, viii. 



HARTZ, N. 1895. Ostgronlands Vegetationsforhold. Meddel. om Gronland, 



xviii. 

 HARVEY, Le R. H. 1903. A study of the physiographic ecology of Mt. Ktaadn, 



Maine. Univ. of Maine Stud., v. 

 1908. Floral succession in the prairie-grass formation of South-Eastern 



South Dakota. Botan. Gazette. 



HASSERT. 1895. Petermanns Mitth., Erganzungsh. cxv. 

 HAYEK, A. v. 1905. Exkursion auf den Wiener Schneeberg, II. Internat. Botan. 



Kongress, Wien. 



1907. Die Sanntaler Alpen. Steiner Alpen. Abh. Zool.-Bot. Ges. W 7 ien, iv. 



HEDGCOCK, GEORGE G. 1902. The relation of the water content of the soil 



to certain plants, principally mesophytes. Bot. Surv. of Nebraska, vi. 



Lincoln, Nebr. 

 HEGI, G. 1905. Beitrage zur Pflanzengeographie der bayerischen Alpenflora. 



Ber. Bayer. Bot. Ges., x. 

 HEINRICHER, E. 1884. Uber isolateralen Blattbau. Pringsh. Jahrb., xv. 



1885. Uber einige im*Laube dikotyler Pflanzen trockenen Standortes 



auftretende Einrichtungen, welche muthmaasslich eine ausreichende Wasser- 

 versorgung des Blattmesophylls bezwecken. Bot. Centralbl., xxiii. 



1897-1904. Die griinen Halbschmarotzer. Pringsh. Jahrb., xxxi, xxxii, 



xxxvi, xxxvii, xxxviii. 

 HEMBERG, E. 1904. Tallens degenerationszoner i sodra och vastra Sverige. 



Skogsvlrdsfor. Tidskr. 



HEMMENDORFF, E. 1897. Om lands Vegetation. Upsala. 

 HEMSLEY, W. B. 1885. On the dispersal of plants by oceanic currents and birds. 



Challenger Rep., Botany, i. 

 HENSEN, V. 1887. Uber die Bestimmungen des Planktons. Ber. Kommis. Wiss. 



Unters. Deut. Meere, v, vi. 



1800. Einige Ergebnisse der Plankton-Expedition der Humboldt-Stiftung. 



Sitzungsber. Berliner Akad. 



HENSLOW, G. 1894. The origin of plant-structures by self-adaptation to the 

 environment, exemplified by desert or xerophilous plants. Jour. Linn. 

 Soc. Lond., xxx. 



1895. The origin of plant-structures. London. 



1908. The heredity of acquired characters in plants. London. 



WARMING C C 



