FIFTY YEARS OF PALEOBOTANY, 1906-I956 603 



Jeffrey, E. C. 1917. The anatomy of woody plants. Univ. Chicago Press. Chi- 

 cago. 

 . 1924. The origin and organization of coal. Mem. Amer. Acad. Arts and 



Sciences 15:1-52. 

 Johnson, J. H. 1954. An introduction to the study of rock building algae and algal 



limestones. Colorado School Min. Quart. 49:1-117. 

 JoNGMANS, W. J. 1930. On the fructification of Sphenopteris hoeninghausi and its 



relations with Lyginodendron oldhamium and Crossotheca schatzlarensis. Geol. 



Bur. voor het Neder. Mijn. te Heerlen Jaarver. over 1929:77-81. 

 . 1949. Het Wisselend aspect van het bos in the ouders geologische formaties. 



Pp. 1-165 in W. B. Beekman, Hout in alle Tijden, Part 1. Deventer, The 



Netherlands. 

 ET AL. 1913 to date. Fossilium catalogus. II. Plantae. The Hague. 



Just, T. 1947. Geology and plant distribution. Ecol. Monographs 17(2) :127-137. 



. 1948. Gymnosperms and the origin of angiosperms. Bot. Gaz. 110:91-137. 



. 1949. The nomenclature of fossil plants. Amer. Jour. Bot. 36:28-32. 



. 1951. Mesozoic plant microfossils and their geological significance. Jour. 



Paleont. 25(6) : 729-735. 



. 1952. Origine et evolution de la fleur. Ann. Biol. 28(5/6) : 135-143. 



. 1952. Fossil floras of the Southern Hemisphere and their phytogeographical 



significance. Bull. Amer. Mus. Natur. Hist. 99(3) : 189-203. 

 ET AL. 1946. Symposium on paleobotanical taxonomy. Amer. Midi. Natur. 



36(2):257-380. 



KiDSTON, R. 1924. Fossil plants of the Carboniferous rocks of Great Britain. Mem. 

 Geol. Survey Gr. Britain 2:377-522. 



AND W. H. Lang. 1917-1921. On Old Red Sandstone plants showing struc- 

 ture, from the Rhynie chert bed, Aberdeenshire. Trans. Roy. Soc. Edinburgh 

 51:761-784, 52:603-627, 643-680, 831-854, 855-902, 52 pis. 



Knowlton, F. H. 1919. Catalogue of the Mesozoic and Cenozoic plants of North 

 America. Geol. Survey Bull. 696. 



. 1927. Plants of the past. Princeton Univ. Press. Princeton, N.J. 



KosANKE, R. M. 1950. Pennsylvanian spores of Illinois and their use in correlation. 

 Illinois Geol. Survey Bull. 74. 



Krausel, R. 1949. Vom Wesen des Steinkohlen-Waldes : Ein Kapitel aus der 

 Geschichte der palaobotanischen Forschung. Natur und Volk 79(3/4) : 54-63. 



. 1950. Versunkene Floren: Eine Einfiihrung in die Palaobotanik. Waldemar 



Kramer. Frankfurt am Main. 



H. Weyland. 1930-1949. Pflanzenreste aus dem Devon. Parts 1-14. Sencken- 



bergiana vols. 12-17. 

 Kremp, G. O. W. 1955. The most important results of microflora investigations in 



Tertiary and Mesozoic strata of Europe, especially of Germany. Mimeographed. 



26 pp. 

 Kryshtofovich, a. N. 1929. Evolution of the Tertiary Flora in Asia. New Phytol. 



28:303-312. 

 Lam, H. J. 1955. Comments on two charts relative to the phylogeny of the Cor- 



mophyta, with some remarks of a general nature. Acta Bot. Neerlandica 4(3) : 



410-428. 



