File:Interstate medical journal (1919) (14760941171).jpg

Identifier: interstatemedica2619unse (find matches)
Title: Interstate medical journal
Year: 1919 (1910s)
Authors:
Subjects: Medicine
Publisher: St. Louis, : Interstate Medical Journal
Contributing Library: The College of Physicians of Philadelphia Historical Medical Library
Digitizing Sponsor: The College of Physicians of Philadelphia and the National Endowment for the Humanities

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Fig. 6.—Resinweed. Blamed in Wyoming and the adjoining states for theprevalence of hayfever, but its sticky pollen cannot rise in the air. following day. They are fertilized by the honey bee, bumble bee,and nocturnal moths. They are listed as hayfever plants in someof the older text-books, but are harmless. There are about 15varieties in the United States and all are typical insect-pollinatedflowers. Field Daisy (Chrysanthemum, Fig. 4). The botanical name of Scheppegrell: Harmless Floivers and Hayfever Weeds 135 the field daisy is chrysanthemum, which is Greek of goldenflower. They are the most common flower of the field and road-side, and are universal favorites for their simplicity and decorativebeauty. There are about 100 varieties of wide geographical distribution.All are fertilized by bees and Butterflies. Their pollen is neverfound in the air, so that they do not cause hayfever, although irrita-tion may result in sensitive nostrils by direct contact with theflowers.
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Fig. 7.—Common Ragweed. It is the cause of 90 percent of the fall hayfever eastof the 100th meridian, and is the principal cause of hayfever in the UnitedStates generally. Dandelion (Leontodon, Fig. 5). The familiar yellow flower ofthe dandelion is common both in the city and country. The broad-toothed jagged edge of the leaves bears some resemblance to theteeth of the lion, hence the name dandelion (dents de lion). Thereare about 20 varieties in North and South America. All are insect-pollinated and harmless, except on direct application. Childrenshould not apply the dandelion to the nostril, as it may develop alatent hayfever, which may result in sensitization to atmosphericpollens. 136 INTERSTATE MEDICAL JOURNAL Resin weed (Grindelia squarrosa, Fig. 6). This is blamed inWyoming and the adjoining states for the prevalence of hayfever.The pollen of the resinweed, however, like the flowers, is stickyand resin-like, as implied by the popular name (also called gum

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