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Urushiol / ʊ ˈ r uː ʃ i. ɒ l / is an oily mixture of organic compounds with allergenic properties found in plants of the family Anacardiaceae, especially Toxicodendron spp. (e.g., poison oak, Chinese lacquer tree, poison ivy, poison sumac), Comocladia spp. (maidenplums), Metopium spp.
Dermatographic urticaria is sometimes called "skin writing", as it is possible to mark deliberate patterns onto the skin. The condition manifests as an allergic-like reaction, causing a warm red wheal to appear on the skin. As it is often the result of scratches, involving contact with other materials, it can be confused with an allergic ...
[9] [10] Its white pouch-like lip, sometimes dotted with maroon on the inside, is accented by tan, green or brown lateral sepals and petals. [11] It has been known to hybridize [7] with the small yellow ladyslipper, C. parviflorum var. makasin, resulting in the natural hybrid Cypripedium × andrewsii. The leaves and stems are slightly pubescent.
The rash typically persists one to two weeks, but in some cases may last up to five weeks. Urushiol is primarily found in the spaces between cells beneath the outer skin of the plant, so the effects are less severe if the plant tissue remains undamaged on contact. Once the oil and resin are thoroughly washed from the skin, the rash is not ...
Honeydew is a sugar-rich sticky liquid, secreted by aphids, some scale insects, and many other true bugs and some other insects as they feed on plant sap. When their mouthpart penetrates the phloem , the sugary, high-pressure liquid is forced out of the anus of the insects, allowing them to rapidly process the large volume of sap required to ...
Find out how to prune orchids of all types, and when to do your pruning to encourage fresh growth and more blooming.
Cypripedium parviflorum, commonly known as yellow lady's slipper [4] or moccasin flower, [5] is a lady's slipper orchid native to North America. [3] It is widespread, ranging from Alaska south to Arizona and Georgia. [6] It grows in fens, wetlands, shorelines, and damp woodlands. [7]
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