I have always been fascinated by poisonous plants. I write murder mysteries, and what better murder weapon than a toxin from a naturally occurring plant? We have several poisonous plants here on Kodiak Island, and over the next few weeks, I will describe a few of them.
In the summer, most of Kodiak Island is covered by a dense jungle-like growth. We have beautiful wildflowers and plants bearing delicious berries, including salmonberries, blueberries, raspberries, cranberries, crowberries, watermelon berries, and others. Rhubarb and raspberries planted by early settlers remain abundant in some areas.
There are a few plants here, though, that are not so innocent. The sap and outer hairs of cow parsnip, locally called pushki and one of the most prolific plants on the island, contains the chemical furanocoumarin which causes an extreme sensitivity to light. If a person comes into contact with the sap of a cow parsnip plant, within a few days, he will likely develop a red, itchy rash and blisters on the area the sap touched. These blistering sores last for days or weeks. I often use a weed eater to clear vegetation around the house, and I’ve learned the hard way not to cut cow parsnip with a weed eater because when the sap flies from the plant and splatters my hands and face, I know I will have painful, ugly, red welts in a few days. Some people are not allergic to cow parsnip, and others are so allergic they will react if they merely touch the stems or leaves of the plant.
Nettles are another troublesome plant on Kodiak. Fine, stinging hairs cover the leaves of a nettle. Some researchers believe formic acid causes the hairs to sting, while others attribute the sting to a histamine compound. If you touch the leaves of a mature plant, you will feel a prick, much like a wasp’s sting. The pain may last for a few hours but will eventually subside. Nettles lose their sting when cooked and taste delicious, much like spinach. Nettles also have many medicinal applications and may be used to ease sore muscles and joint inflammation
While these plants can be irritating and painful and make walking through the dense vegetation on Kodiak a challenge, neither cow parsnip nor nettles will kill a human. Over the next few weeks, I will cover the deadly toxic plants we have in our area and give accounts of cases where they have been used both in literature and in the real world.