68718. Watson, S.   Contributions to American Botany. VII. Descriptions of New Species of Plants, with revisions of Lychnis, Eriogonum, and Chorizanthe.   The American Academy of Arts and Sciences, 1872, Proceedings of the American Academy of Arts and Sciences, Volume 7 : pages 246-278.   Self wrapped, previous owners stamps, usual signs of use and age, text in good or better condition.    $38.00

68573. Watson, S.   Contributions to American Botany. II. Revisions of the Extra-Tropical North American Species of the Genus Lupinus, Potentialla, and Oenothera .   The American Academy of Arts and Sciences, 1873, Proceedings of the American Academy of Arts and Sciences, Volume 8 : pages 517-618.   Plain wraps, previous owners stamps, usual signs of use and age, text in good or better condition.    $100.00

68572. Watson, S.   Contributions to American Botany. IV. Revision of the North American Chenopodiaceae.   The American Academy of Arts and Sciences, 1874, Proceedings of the American Academy of Arts and Sciences, Volume 9 : pages 82-126.   Printed wraps missing, previous owners stamps, usual signs of use and age, text in good condition.    $38.00

68571. Watson, S.   Contributions to American Botany. V. Revision of the Genus Ceanothus, and Descriptions of New Plants, with A Synopsis of the Western Species of Silene.   The American Academy of Arts and Sciences, 1875, Proceedings of the American Academy of Arts and Sciences, Volume 10 : pages 333-350.   Self wrapped, binding holes along spine, previous owners stamps, usual signs of use and age, text in good or better condition.    $38.00

79196. Watson, S.   Contributions to American Botany.   American Academy of Arts and Sciences, 1882, Proceedings of the American Academy of Arts and Sciences, Volume 18 : pages 316-382.   Homemade wraps, original text extracted from larger volume, previous owners stamp, minor signs of use and age, text in very good condition.    $22.00

68717. Watson, S.   Contributions to American Botany. XI. I. List of Plants from Southwestern Texas and Northern Mexico … and II. Descriptions of Some New Western Species .   The American Academy of Arts and Sciences, 1883, Proceedings of the American Academy of Arts and Sciences, Volume 18 : pages 96-196.   Printed wraps, signed by Sereno Watson, previous owners stamps, usual signs of use and age, uncut text in very good condition.    $56.00

68716. Watson, S.   Contributions to American Botany. XIII. I. List of Plants Collected in Southwestern Chihuahua, Mexico…, II. Descriptions of New Species of Plants, …, III. Notes Upon Plants Collected Yzabal, Guatemala …, and IV. Notes Upon Some Palms of Guatemala.   The American Academy of Arts and Sciences, 1886, Proceedings of the American Academy of Arts and Sciences, Volume 21 : pages 414-468.   Self wrapped, previous owners stamps, usual signs of use and age, text in good condition.    $38.00

69156. Watson, S.   Contributions to American Botany. XIV. I. List of Plants Collected by Dr. Edward Palmer in the State of Jalisco, Mexico, in 1886 and II. Descriptions of Some New Plants.   The American Academy of Arts and Sciences, 1887, Proceedings of the American Academy of Arts and Sciences, Volume 22 : pages 396-481.   Printed wraps present but detached, previous owners stamps, text in good or better condition.    $56.00

69157. Watson, S.   Contributions to American Botany. XV. I. Some New Plants of the United States ..., II. Some New Species of Mexican Plants ..., and III. Descriptions of some Plants of Guatemala .   The American Academy of Arts and Sciences, 1888, Proceedings of the American Academy of Arts and Sciences, Volume 23 : pages 249-287.   Printed wraps, signed by Sereno Watson, previous owners stamps, usual signs of use and age, text in good or better condition.    $38.00

69158. Watson, S.   Contributions to American Botany. XVI. I. Upon a Collection of Plants made by Dr. E. Palmer in 1887, about Guaymas, Mexico, ... and II. Descriptions of Some New Species of Plants, Chiefly Californian, with Miscellaneous Notes.   The American Academy of Arts and Sciences, 1889, Proceedings of the American Academy of Arts and Sciences, Volume 24 : pages 36-87.   Printed wraps, signed by Sereno Watson, previous owners stamps, usual signs of use and age, text in good or better condition.    $38.00

69159. Watson, S.   Contributions to American Botany. XVII. I. Miscellaneous Notes Upon North American Plants …, and II. Descriptions of New Species of Plants, form Northern Mexico, ...   The American Academy of Arts and Sciences, 1890, Proceedings of the American Academy of Arts and Sciences, Volume 25 : pages 124-163.   Printed wraps, signed by Sereno Watson, previous owners stamps, usual signs of use and age, text in good or better condition.    $38.00

69160. Watson, S.   Contributions to American Botany. XVIII. I. Description of Some New North American Species, …, II. Descriptions of New Mexican Species, …, III. Upon a Wild Species of Zea from Mexico, and IV. Notes Upon a Collection of Plants from the Island of Ascension.   The American Academy of Arts and Sciences, 1891, Proceedings of the American Academy of Arts and Sciences, Volume 26 : pages 124-163.   Printed wraps with back wrap missing, signed by Sereno Watson, previous owners stamps, usual signs of use and age, text in good condition.    $38.00

46617. Goodale, G. L.   Sereno Watson.   American Academy of Arts and Science, Cambridge, 1893, Proceedings from the American Academy of Arts and Sciences, Volume 27 : pages 403-416 with photo plate.   Printed wraps with edge wear and tape repair to spine, previous owners book stamp, text in good plus or better condition.    $11.00

67100. Greene, E. L.   Latin as the Language of Botanical Diagnosis.   The American Academy for the Advancement of Science, 1905, Science, Volume 22, Number 559 : pages 338-340.   Reprint, folded, other minor signs of use and age, text in very good condition.    $2.00

67102. Harper, R. A.   Some Current Conceptions of the Germ Plasm.   The American Academy for the Advancement of Science, 1912, Science, Volume 35, Number 911 : pages 909-923.   Reprint, previous owners book stamp, usual signs of use and age, text in very good condition.    $8.00

67103. Harris, J. A.   Introductions to the New Statistics with Special Reference to the Needs of Biologists.   The American Academy for the Advancement of Science, 1914, Science, Volume 39, Number 1014 : pages 828-830.   Reprint, previous owners book stamp, usual signs of use and age, text in very good condition.    $2.00

67104. Hall, H. M.   An Emergency Supply of Rubber.   The American Academy for the Advancement of Science, 1918, Science, Volume 47, Number 1219 : pages 452-454.   Reprint, previous owners book stamp, minor signs of use and age, text in very good condition.    $2.00

67106. Gundersen, A.   Is an International List of Genera of Cultivated Plants Possible.   The American Academy for the Advancement of Science, 1925, Science, Volume 62, Number 1617 : pages 589.   Reprint, previous owners book stamp, minor signs of use and age, text in very good condition.    $1.00

67107. Gundersen, A.   The Need of an Enlarged List of Botanical Nomina Conservanda.   The American Academy for the Advancement of Science, 1926, Science, Volume 64, Number 1651 : pages 182-183.   Reprint, previous owners book stamp, minor signs of use and age, text in very good condition.    $2.00

67108. Hafenrichter, A. L. and Hottes, C.   A Constant Rate Aspirator.   The American Academy for the Advancement of Science, 1928, Science, Volume 67, Number 1734 : pages 320-321.   Reprint, signs of use and age, text in good condition.    $2.00

67109. Copeland, E. B.   What is the Type of a Genus.   The American Academy for the Advancement of Science, 1929, Science, Volume 69, Number 1786 : pages 327-328.   Reprint, previous owners book stamp, minor signs of use and age, text in very good condition.    $1.00

111716. Parker, G. H. et al.   The Relation of the Eyes to Chromatophoral Activities.   American Academy of Arts and Sciences, 1935, Proceedings of the AAAS, Volume 69, Number 12 : 439-462 with 6 figures.   Softbound, signed by the author, very good condition.    $13.00

67110. Greenleaf, W. H.   Induction of Polyploidy in Nicotiana.   The American Academy for the Advancement of Science, 1937, Science, Volume 86, Number 2242 : pages 565-566.   Reprint, usual signs of use and age, text in very good condition.    $2.00

79197. Merrill, E. D. and Perry, L. M.   Memoirs of the Gray Herbarium of Harvard University. IV, The Myrtaceous Genus Syzygium Gaertner in Borneo.   American Academy of Arts and Sciences, 1939, Memoir of the American Academy of Arts and Sciences, Volume 18, Part 3 : pages 135-202.   Softbound, sun fading and wear to covers, other minor signs of use and age, text in very good condition.   Reprint by the Gray Herbarium.   $22.00

79198. Merrill, E. D. and Freeman, F. L.   Memoirs of the Gray Herbarium of Harvard University. V, The Old World Species of the Celastraceous Genus Microtropis Wallich.   American Academy of Arts and Sciences, 1940, Memoir of the American Academy of Arts and Sciences, Volume 71, Part 10 : pages 271-310.   Softbound, sun fading and wear to covers, other minor signs of use and age, text in very good condition.   Reprint by the Gray Herbarium.   $22.00