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Studies in the genus Hedysarum in North America
Iss 131, Page 217, Date 1940
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Some Spermatophytes of Eastern North America
Iss 131, Page 239, Date 1940
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On two weedy Crucifers
Iss 131, Page 302, Date 1940
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Index [no. 131]
Iss 131, Page 307, Date 1940
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A list of plants from interior Alaska
Iss 132, Page 309, Date 1940
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Index [no. 132]
Iss 132, Page 345, Date 1940
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A century of additions to the flora of Virginia
Iss 133, Page 355, Date 1940
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Index [no. 133]
Iss 133, Page 523, Date 1940
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Revision of the genus Pteridium
Iss 134, Page 1, Date 1941
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Index [no. 134]
Iss 134, Page 69, Date 1941
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Studies in the Iridaceae-- II. A revision of Geissorhiza Ker-Gawl
Iss 135, Page 3, Date 1941
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Desmodium: preliminary studies--II
Iss 135, Page 78, Date 1941
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The genus Charianthus
Iss 135, Page 115, Date 1941
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The type species of Heliconia
Iss 135, Page 134, Date 1941
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Index [no. 135]
Iss 135, Page 139, Date 1941
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Index [no. 136]
Iss 136, Page 1, Date 1941
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Euphorbia subgenus Chamaesyce in Canada and the United States exclusive of southern Florida
Iss 136, Page 97, Date 1941
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Studies in the Bromeliaceae -- XII
Iss 137, Page 381, Date 1941
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A Monographic study of Arabis in western North America
Iss 138, Page 289, Date 1941
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Index [no. 138]
Iss 138, Page 483, Date 1941