West Coast botany : an analytical key to the flora of the Pacific Coast in which are described over eighteen hundred species of flowering plants growing west of the Sierra Nevada and Cascade crests, from San Diego to Puget Sound - Rattan, Volney, 1840 -1915 (Whitaker & Ray, 1898)

The Western Australian Naturalist - Western Australian Naturalists' Club (Western Australian Naturalists' Club, 1989)

Western flower guide, wild flowers of the Rockies and west to the Pacific - Saunders, Charles Francis, 1859 -1941 (Doubleday, Page & company, 1917)

Whitefly of the world : a systematic catalogue of the Aleyrodidae (Homoptera) with host plant and natural enemy data - British Museum (Natural History) (British Museum (Natural History) and Wiley, 1978)

Wholesale trade list : hardy ornamental trees, shrubs and herbaceous plants - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Wyomanock Nurseries, 1901)

Wholesale trade list : hardy ornamental trees, shrubs and herbaceous plants - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Wyomanock Nurseries, 1900)

The wild and cultivated cotton plants of the world; a revision of the genus Gossypium, framed primarily with the object of aiding planters and investigators who may contemplate the systematic improvement of the cotton staple - Watt, George, Sir, 1851 -1930 (Longmans, Green, and Co, 1907)

The wild and cultivated cotton plants of the world; a revision of the genus Gossypium, framed primarily with the object of aiding planters and investigators who may contemplate the systematic improvement of the cotton staple - Watt, George, Sir, 1851 -1930 (Longmans, 1907)

The wild flowers of California : their names, haunts, and habits - Buck, Margaret Warriner, 1857 -1929 (H.S. Crocker, 1918)

The wild flowers of California : their names, haunts, and habits / by Mary Elizabeth Parsons ; illustrations by Margaret Warriner Buck - Parsons, Mary Elizabeth (Cunningham, Curtiss & Welch, 1907)

The wild flowers of California; their names, haunts, and habits; by Mary Elizabeth Parsons; illustrated by Margaret Warriner Buck - Parsons, Mary Elizabeth (Payot, Upham, & company, 1902)

Wild flowers of the National Park Region, native American alpines - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Frank H. Rose, 1951)

Wild flowers of the National Parks region : native American alpines - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Frank H. Rose, 1950)

Wild plants of Canada : a flora, with descriptive key of families represented - Spotton, H. B. (Henry Byron), 1844 -1933 (Gage, 1929)

The woody plants of Manhattan in their winter condition - Hitchcock, A. S. (Albert Spear), 1865 -1935 (Mercury Pub. House, 1893)

you hua zhi wu ke zhi shuang zi ye zhi wu - Hutchinson, J. (John) 1884 -1972 (shang wu yin shu guan)

yun nan zhi wu zhi - yun nan sheng zhi wu yan jiu suo (ke xue chu ban she, 1979)

Zeitschrift für Botanik (1910)

Zeitschrift für die gesammten Naturwissenschaft - Naturwissenschaftlicher Verein für Sachsen und Thüringen in Halle. (Wiegandt, Hempel & Parey, 1853)

zhong guo jing ji kun chong xue.zeng ding ban 中国经济昆虫学.增订版 - Li, Fengsun 李凤荪 (bian zhe zi kan 编者自刊, 1951)

zhong guo jing ji zhi wu bing yuan mu lu - Dai, Fanglan, Xiang Wangnian & Zheng Ruyong (ke xue chu ban she, 1958)

zhong guo zhi wu ke shu jian suo biao - Zhongguo zhi wu yan jiu suo bian (zhong guo ke xue yuan zhi wu yan jiu suo, 1953)

zhong guo zhong zi zhi wu fen lei xue - zheng mian (zhong guo ke xue tu shu yi qi gong si, 1956)

zhong guo zhong zi zhi wu ke shu ci dian - Hou, Kuanzhao 侯宽昭 (ke xue chu ban she, 1982)

zhong zi zhi wu ming cheng - Zhongguo ke xue yuan bian yi ju (zhong guo ke xue yuan, 1954)

Zoe:a biological journal (Zoe Publishing Co, 1890)

Zoe:a biological journal (Zoe Publishing Co, 1892)

Zoe:a biological journal (Zoe Publishing Co, 1893)

Zoe:a biological journal (Zoe Publishing Co, 1894)