We all love morning glories, those blue-purple trumpets that open in abundance in the morning, then fade during the day, only to display a new crop of blooms the next sunny morning. But we all hate field bindweed. Yet, the two are closely related.
The family relationships of morning glories and bindweeds are exceedingly complicated – kind of like trying to figure out how Uncle Ernest is related to Grandma’s sister. Bindweed is Convolvulus arvensis, and the most common garden morning glory is really an Ipomoea. Some bindweeds are in the Calistegia family, but there are even more genera involved in these twining, flowering trumpets.
Let’s say you and I know what a morning glory is: a dazzling, desirable plant in the garden. And its lowly cousin, the bindweed, is a curse.
It is not that bindweed is ugly: Their trumpets are usually a bit smaller and often just plain white. But some have a blushing rose painted in, and could well compete with the showier morning glories if they were not so – well, invasive.
The pop up everywhere and vine themselves around your dahlias and daylilies and whatnot, and smother them. Just when you have hacked the vegetable patch, only days later their peep up again, and show you that all your work was in vain.
It comes out of the ground so dainty and harmless – but don’t be fooled: Scattering their seeds is only the small part of it. Worse is that the teeniest bit of root left in the ground will sprout a whole new plant in no time. That feature makes them a weed – and a weed that in all likelihood won’t be eradicated for good from your garden (or mine).
If the taxonomy and names of morning glories and bindweeds are confusing, so are their origins. Roughly one can say the showy garden morning glories come from the New World, especially Mexico, and bindweeds are Old World inhabitants. Bindweed was introduced to Virginia in the 1700’s, and rapidly spread from there. There is a Mediterranean variety called scammony (Convolvulus scammonia), used as a medicinal plant in Syria.
Bindweed and is mildly poisonous; “mildly poisonous” means you likely will not die but will be sick as a dog and you wish you were dead. Nevertheless, the Aztecs used it as a hallucinogenic – I don’t recommend trying what the Aztecs tried though. Suffice to know that Angel’s trumpet is a relative, too – all morning glories should be handled with caution. Literally handled: Some species, particularly in the subtropics and tropics, are so poisonous that mere contact can make one sick. Livestock might be poisoned, especially by the white roots, if for instance swine dig for the roots.
With all its nauseating toxicity, bindweed has been used as a medicinal plant: A tea from the flowers is good against infections and fevers, and also works as a laxative. Perhaps, to discourage its use, I should call it properly a drastic cathartic, which what it is. It is a cholagogue, meaning it induces the gallbladder to push out bile into the bowels. Nausea and cramps surely are some of its side-effects.
The herb has been laid on festering wounds and promotes healing. But unless you are in bind – umh! – I would prefer comfrey and aloe to heal wounds because we don’t know well enough how much of the bindweed is taken up through a skin sore.
And lastly, bindweed is being investigated as a possible cancer drug. It seems to be an angiogenesis inhibitor, meaning it does not allow a growing tumor to vascularize itself (growing the necessary blood vessel to feed itself) – thus, the cancer is starved. But it sound more straightforward than it is – again, I wouldn’t try this at home.
Bindweed, invasive and frustrating. But it might have its redeeming sides. Nothing on which we should use Round-up (which we should use on NOTHING!!) – just investigate its usefulness. Read More
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