INDEX TO AMERICAN BOTANICAL LITERATURE 117 
Jouvenaz, J. H. Echinocactus. Floralia 42: 372. 17 Je 
1921. [Illust.] 
Jouvenaz, J. H. LEchinocereus. Floralia 42: 372. 17 Je 1921. 
[Illust.] 
Kearney, T. H. Pollination of Pima cotton in relation to the 
yield of seed and fiber. Jour. Hered. 12: 99-101. 10 Au 
1921. 
Kermode, F. A preliminary catalogue of the flora of Vancouver 
and Queen Charlotte Islands. Pp. 1-89. Victoria, British 
Columbia. 1921. 
Kirjasoff, A. B. ee the beautiful. Nat. Geog. Mag. 37: 
247-292. Mr 19 
Kobel, F.  Einige Stat na zu den Astragalus- und a 
bewohnenden Uvomyces-Arten. Ann. Mycol. 19: 1-1 
1921. 
Korstian, C. F. Grazing practice on the natural forests and its 
effect on natural conditions. Sci. Mo. 13: 275-281. f. 1-7. 
Kradusel, R. Die Bedeutung der Anatomie lebender und 
fossiler Hélzer fiir die Phylogenie der Koniferen. Naturw. 
Wochenschr, 32: 305-311. f. I-g. 10 Je 1917. 
Krausel, F. Welche Ergebnisse liefert die Untersuchung tertiarer 
Pflanzenreste? Naturw. Wochenschr. 33: 209-213. 
14 Apig18. 
Krieger, L. C. C. Common mushrooms of the United States. 
Nat. Geog. Mag. 37: 387-439. pl. 1-16 My 1920. 
Lantes, A. El alamo [Populus]. Revista Agr. Com. y Trab. 
2: 612, 613. D 1ig1g. ({Illust.] 
Lingelsheim, A. Oleaceae-Oleoideae-Fraxineae. Pflanzenreich 
IV. 243: 1-66, 115-125. f. 1-11 + map. 29 Je 1920. 
Includes 2 new North American species of Fraxinus. 
Livingston, B. E., & Shreve, F. The distribution of vegetation 
in the United States, as related to climatic conditions. 
Carnegie Inst. Washington Publ. 284: r-xvi + 1-590. pl. 
7} +f. Ie. Feet. 
Locy, W.A. The earliest printed illustrations of natural history. 
Sci. Mo. 13: 238-258. f. z-ro. S 1921. 
MacDougal, D. T. Growth in trees. Carnegie Inst. Wash- 
ington Publ. 307: 3-41. f. 1-16. 1921. 
