(331 Nordamerikauisohes Pflanzenreich. 483 



63. Red or slippery elm, Ulmus fulva Michx. (Eb., X.W. H. 1 (25. Okt. 

 1907], p. 1(5, Illustr.) 



lii. Redwood, Sequoia sempervirens Endl. ( Kb., XXV, II. 2 |10. November 

 1907|, p. IG, 17, Illustr.) 



63. Douglas fir, Pseudotsuga taxifolia Britton. (Eb., XXV, H. 3 [25. Nov. 

 1907], p. 16, 17, Illustr.) 



66. Noble fir or Oregon larch, Abies nobilis Lindl. (Eb., XXV, H. 4 

 [10. Dezember 1907], p. 16, 17, Illustr.) 



67. Western or Pacific Coast cedar, Thuja plicata Don, Thuja glgantea 

 Nutt. (Eb., XXV, H. 5 [25. Dezember 1907), p. 16, 17, Illustr.) 



68. Western hemlock, Tmga heterophylla Sargent. (Eb., XXV, H. 7 

 25. Jan. 1908], p. 16, 17, Illustr.) 



69. Pecan, Hicoria Pecan Britton. (Eb., XXV, H. 9 [1908], p. 16, 17, 

 Illustr.» 



70. Osage orange, Toxylon pomiferum. (Eb , XXV, H. 10 [10. März 1908], 

 p. 16, 17, Illustr.) 



71. Ailanthus or tree of heaven, Ailanthus glandulosa Desf. (Eb., XXV, 

 H. 11 [25. Mai 1908], p. 16, 17, Illustr.) 



72. Bitternut hickorj, Hicoria minima Britt. (Eb., XXV, H. 12 [10. April 

 1908], p. 16, 17, Illustr.) 



73. Balsam fir, Abies balsamea Linn. (Eb., XXVI, H. 1 [25. April 1908], 

 p. 16, 17, Illustr.) 



77. Bahn of Grilead, Populus balsamifera Linn. (Eb., XXVI, H. 9 

 [25. August 1908], p. 18, 19, Illustr.) 



340. Britton, N. L. North American trees. New York (April 1908), 

 i— x u. 1—891, f. 1—781. 



Includes the trees found wild north of the West Indies and Mexico, 

 describing new species in Populus (2), Salix, Acer (2), Fraxinus (3) and Acacia. 



310 a. Britton, N. L. and Shafer, J. A. North American trees. New 

 York 1909, 894 pp., 4°, 775 111. 



340b. Britton, N. L. and Rose, J. N. The gen us Cereus and its allies 

 in North America. (Oontr. U. S. nation. Herb. Washington, XII, 1909, p. 413 

 bis 437.) N. A. 



Ber. im Bot. Centrbl., CXI, 1909, p. 523-524. 



341. Laney, C. C The types of the American elm. (Grard. Mau.. 

 VII [Mr.], 1908, V- 154—156, fig. 1 — 12.) 



342. üenicker, R. Die schönsten und grössten Bäume des nord- 

 amerikanischen Waldes. (Mitt. D. Dendrol. Ges., 1908, p. 166 — 171, 1909 

 p. 57—68.) 



Ber. im Bot. Centrbl., CXIV, p. 388—389. 



343. Britten, James. Quercus nigra. (Journ. of Bot., XLVII, 1909, p. 34!) 

 bis 351.) 



Unter dem Namen Q. n. sind verschiedene Arten und Eormen aus 

 Nordamerika früher vereint. 



344. Eggleston, W. W. New North American Crataegi. (Bull. Torr 

 Bot. Ol., XXXVI, 1909, p. 639—642.) 



345. Sargent, C. S. American Crataegi in the Species Plantarum 



Linnaeus. (Rhodora, XI, 1909, p. 181—183.) 



Ber. im Bot. Centrbl., CXIII, p. 188. 



31* 



