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LITERATURE CITED Anderson, E. and R. E. Woodson, Jr. 1935. The species of Tradescantia indigenous to the United States. Contributions from the Arnold Arboretum 9: 1-132. Beal, E. O. 1964. Sagittaria in A. E. Hadford, H. E. Ahles, and C. R. Bell, Guide to the vascular Hora of the Carolinas, The Book Exchange , University of North Carolina, Chapel Hill, N. C., pp. 54-56. Blake, S. F.. 1912. The forms of Peltandra virginica. Rhodora 14: 102-6. Bogin, C. 1955. Revision of the genus Sagittaria (Alismataceae). Memoirs of the New York Botanical Garden 9(2) :179-233. Bowden, W. M. 1940. Diploidy, polyploidy, and winter hardiness relationships in the flowering plants. American Journal of Botany 27:357-71. 1945. A list of chromosome numbers in higher plants. H. Menispermaceae to Verbenaceae. American Journal of Botany 32:191-201. Brendel, F. 1859. Additions and annotations to Mr. Lapham's catalogue of Illinois plants. Transactions of the Illinois State Agricultural Society 3:583-85. ---. 1887. Flora Peoriana. Peoria, Illinois. Brown, W. V. 1947. Cytological studies in the Alismaceae. Botanical Gazette 108:262-67. Buchenau, F. 1906. Juncaceae. In Engler, Das Pflanzenreich 25 (IV. 36) :1-284. Chase, S. S. 1947. Polyploidy in an immersed aquatic angiosperm. American Journal of Botany 34:581-82. Coville, F. V. 1893. funcus mal'ginatus and its varieties. Proceedings of the Biological Society of Washington 8: 121-28. 1895. funcus sei1'poides and its immediate relatives. Bulletin of the Torrey Botanical Club 22:302-5. Cronquist, A. 1968. The evolution and classification of flowering plants. Houghton MHIlin Company, Boston, 396 pp. Curtis, J. 1862. British entomology. Volume VII. Lovell Beeve and Company, London. Dark, S. O. S. 1932. Meiosis in diploid and triploid lIemerocallis. New Phytologist 31 (5) :310-20. Darlington, C. D. and C. J. Vasa. 1963. Bias in the internal coiling direction of chromosomes. Chromosoma 13:609-22. 325 326 / LIT ERA T U R Eel TED Darlington, C. D. and A. P. Wylie. 1956. Chromosome atlas of flowering plants. The Macmillan Company, New York. Daubs, E. H. 1965. A monograph of Lemnaceae. Illinois Biological Monographs No. 34, The University of Illinois Press, Urbana. 118 pp. DeFilipps, R. A. 1964. A taxonomic study of funcus in Illinois. The American Midland Naturalist 71:296-319. ---. 1966. Distribution of IttnCUS in Illinois. Phytologia 13: 44-64. Dobbs, R. J. 1963. Flora of Henry County, Illinois. Natural Land Institute, Rockford, Illinois. 350 pp. Ellis, J. E. 1963. The genus Potamogeton in Illinois. Unpublished Master's thesis, Southern Illinois University. Engelmann, G. A. 1866, 1868. A revision of the North American species of funcus. Transactions of the Academy of St. Louis 2:42458 ,459-98. Fassett, N. C. 1955. Echinodo1'Us in the American tropics. Rhodora 57:133-56, 174-88,202-12. Fernald, M. L. 1932. The linear-leaved North American species of Potamogeton, Section Axillares. Memoirs of the American Academy of Arts and Sciences 17(1) :1-183. 1940. The varieties of Commelina el'ecta. Rhodora 42: 435-41. 1945. Botanical specialties of the Seward Forest and adjacen1 areas of southeastern Vh'ginia. Rhodora 47:93-142. ---. 1946. The North American representatives of Alisma Plantago -aquatica. Rhodora 48:86-88. 1950. Gray's manual of botany. Edition 8. The American Book Company, New York. 1632 pp. Fernald, M. L. and K. M. Wiegand. 1914. The genus Ruppia in eastern North America. Rhodora 16:119-27. 1923. Notes on some plants of the Ontario and St. Lawrence basins, New York. Rhodora 25:205-14. Fore, P. L. and R. H. Mohlenbrock. 1966. Two new naiads from Illinois and distributional records of the Naiadaceae. Rhodora 68: z16-20. Cadella, T. W. J. and K. Kliphuis. 1963. Chromosome numbers of flowering plants in the Netherlands. Acta Bot. Neerl. 12: 195-Z30. Cleason, H. A. 1952. The new Britton and Brown illustrated flora of the northeastern United States. Volume 1. The New York Botanical Garden, NeW York. - - - and A. Cronquist. 1963. Manual of vascular plants of northeastern United States and adjacent Canada. D. Van Nostrand and Company, Princeton, Toronto, New York, and London. 810 pp. Graebner, P. 1907. Potamogetonaceae. In Engler, Das Pflanzenreich 29: 11 5. 1 90 7. [18.188.20.56] Project MUSE (2024-04-19 10:17 GMT) Literature Cited ! 327 Hagstrom, J. O. 1916. Critical researches on the Potamogetons. Kung!. Svenska Vetenskapsaked. Handl. 55 (5). Harada, I. 1942. Chromosome studies on Potamogeton. Japanese Journal of Genetics 18:92. Hegelmaier, F. 1868. Die Lemnaceen, cine monographische untersuchung...

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