Hayfever Plants, Their Appearance, Distribution, Time of Flowering, and Their Role in Hayfever: With Special Reference to North America

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The Chronica Botanica Company, 1945 - Hay-fever plants - 245 pages
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Contents

THE BOTANY OF HAYFEVER
1
Fig 2 Cornus florida dogwood flowers
3
Fig 3 Asclepias Cornuti milkweed flower and pollinia
4

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