Lincoln Park
Chicago, IL
July 2020
Milkweed by
Paul Sager, on Flickr
Milkweeds are a family of perennial, flowering plants, named for their latex, a milky substance containing
cardiac glycosides termed
cardenolides. Most species are toxic to humans and many other species, primarily due to the presence of these
cardenolides, although, as with many such plants, there are species that feed upon them (i.e. leaves) and from them (i.e. nectar). The genus contains over 200 species distributed broadly across Africa, North America, and South America.
Milkweed American milkweeds are an important nectar source for native bees, wasps, and other nectar-seeking insects. Milkweeds are also the larval food source for monarch butterflies.
Milkweed and visitor Milkweed is a popular plant among gardeners as it attracts butterflies. Milkweed sap can be very irritating to the skin but is also very dangerous if it gets in your eyes. Many peoples of South America and Africa used arrows poisoned with Milkweed sap to fight and hunt more effectively.
Milkweed and visitor Milkweed is not grown commercially in large scale, but the plant has had many uses throughout human history. Milkweed can be made edible if properly processed. Native Americans used it for everything from a diarrheic, relief from sore throats, it was chewed for swelling and rashes, new mothers that could not produce milk would drink it, it was used to treat colic, it was used to expel tapeworms, it was used to cure snakebite and for a contraceptive.
Milkweed and visitor Most animals won’t eat it because of the taste rather than the danger of toxins. Animals usually do not eat milkweed unless good forage is scarce.
In 1818, when Abraham Lincoln was 9 years old, his mother, Nancy Hanks, died of milkweed poisoning. Milkweed poisoning was a little-understood malady caused by a plant called "snakeroot" eaten by cows and transmitted through dairy products and meat. Its human victims died in slow agony.
Milkweed and visitor Images shown in this post use a Canon FD 200mm f/4 macro, a manual focus lens from the 1980s. Using a Metabones FD to E adapter, the lens was mounted to a Sony a7II mirrorless digital body. Although the Sony body features 5-axis image stabilization, the camera / lens were mounted to a tripod via a ball head. The image files were processed using Lightroom v6 and Topaz DeNoise v6.
Milkweed and visitor Adult monarchs will only lay eggs on milkweed and the plant is the sole food source for monarch caterpillar larvae. The plant also offers protection: caterpillars ingest a toxic steroid from milkweed that’s distasteful to predators like birds or mice.
Milkweed and visitor These images are sized to fill your wide-screen display. Try using <F11> to maximize your browser window for the full effect. If the images overshoot your display, such as a laptop, just click on the image or the URL link and they'll resize to your screen from the host Flickr site. You can click a bit further into the image details on the Flickr page, if desired. EXIF data is available from the host Flickr pages as well. On the Flickr site, use your <L>key for Large and the <F11> for the full-screen.
Lincoln Park br Chicago, IL br July 2020 br br ... (