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Questions tagged [plants]

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2
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1answer
361 views

Has the Javan devil leaf nettle (urtica urentissima) been shown to cause any deaths?

According to Sir Stephen Tallents, writing in The Spectator, 12 March 1943: The sting of a certain Java nettle, for example, may last for a year and is reputed even to cause death. Mrs. M. Grieve, ...
7
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0answers
306 views

Do people become resistant to stinging nettles?

The WikiHow page How to Touch Nettles Without Stinging Yourself claims: Although experienced nettle harvesters often go bare-handed, this isn't just because they know how to avoid stings. Many of ...
7
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0answers
521 views

Does watering plants with purified water yield better results?

I watched a commercial for the Aquaguard Enhance RO+UV water purifier recently. In that commercial, a science teacher assigns an experiment to students. The students bringing a plant to school, and ...
3
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0answers
2k views

Does Aloe Vera help pass drug test?

The news which is flashing says that usage of Aloe Vera products like juice, gel or shampoo may avoid traces of drugs from the body. It is rumored that Aloe Vera consumption gets you negative for Drug ...
6
votes
1answer
571 views

Do some GMO plants provide bigger yields and more efficient use of land?

I was told that some Genetically Modified Organisms (GMOs) provide bigger crop yields and a more efficient use of land compared to unmodified crops. Monsanto claim: These [GMO] seeds grow into ...
26
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2answers
21k views

Does the “Blood of Jesus on the Cross” flower only bloom during the Holy week (just before Easter)?

It is claimed that this flower grows only in the Holy week on social media. For example: Facebook This beautiful flower grows in New Zealand and is called the "Blood of Jesus on the Cross". ...
9
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1answer
397 views

To what extent do needle trees contribute to fine dust pollution?

Today I ran into an article concerning cars and their effect on the existence of particulate matter. Especially the last paragraph caught my attention where it is claimed that coniferous also ...
3
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0answers
479 views

Does the Kiri Tree reduce carbon dioxide emissions ten times more than the average tree?

The About section of the Kiri Tree website says: The tree is known to reduce carbon dioxide (CO2) emissions ten times more than the average tree and also in return produce ten times more oxygen ...
3
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0answers
459 views

Will plant-life on Earth end due to too little CO2?

According to a 2013 Daily Mail article : greater evaporation and chemical reactions with rainwater will take away more and more carbon dioxide. In less than a billion years, its levels will ...
1
vote
1answer
604 views

Does Asclepias gigantea cause blindness?

It is a widespread bilief that Asclepias gigantea or the "Arka" or "Jilledu" tree is poisonous and causes blindness. The general belief is that If the milk of the plant falls into the eye, you go ...
18
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1answer
4k views

Does broccoli have a nervous system?

It appears there are non-reliable sources on the internet claiming broccoli has a nervous system: forum at funnyjunk.com: Broccoli have a very primitive nervous system. Technically, they are able ...
6
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1answer
687 views

Can one generate enough electricity from a plant to power a cellphone?

This company is marketing a product which uses the photosynthesis of a single houseplant to charge a phone. http://www.bioo.tech/ IIRC the theoretical maximum efficiency of photosynthesis is about ...
15
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1answer
4k views

Has the Gympie Gympie tree driven humans to commit suicide because of the pain from its sting?

I often see the Gympie Gympie mentioned in fun facts or as an answer to "what are the scariest plants in the world?" or "What's the worst pain?" The plant is covered in stinging hairs that once ...
5
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0answers
170 views

Are roses popular on Valentine's Day because they are durable to transport?

In Episode #603 of Planet Money, it is claimed that giving roses is a recent phenomenon. They claim roses are popular due to their toughness (and the fact they bloom close to Valentine's Day) Roses ...
22
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1answer
2k views

Do trees soak up pollution?

You often hear a variation on the idea that plants "absorb" air pollution. For example, in a Yahoo News article on Beijing smog, the reporter writes: The China Daily said there are also not enough '...
10
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0answers
751 views

Does the E-Kaia device harvest electrical power from small plants?

The E-Kaia device claims to be able to harvest electricity released into soil by small plants. Here's a Daily Mail article describing it. And because not all of the electrons are needed, harvesting ...
9
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1answer
2k views

Did humans kill 50% of the world's trees in the last 100 years?

In "Dear Future Generations: Sorry", Prince Ea, American rapper and activist, expresses an emotional message to the upcoming generation in a 6 minutes video. In his video, he apologizes to the future ...
14
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2answers
3k views

Have there been documented cases of “blood pumping from the trunks of trees”?

Several British news reports (including the BBC "Bleeding trees") describe trees issuing red blood-like liquid when cut. Once the stuff of myth and legend, modern day eye-witnesses now catch on ...
6
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2answers
863 views

When is the origin of Datura in India?

The abstract for this paper on PubMed, Historical evidence for a pre-Columbian presence of Datura in the Old World and implications for a first millennium transfer from the New World says, Datura (...
15
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0answers
13k views

Is rice water a good fertilizer?

When rice is washed, the wash water becomes whitish due to the starchy powder in the skin of unwashed rice. I've often heard or read, usually in water-saving, money-saving, or gardening tips, that the ...
8
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1answer
2k views

Do bananas last 3 to 5 days longer if you wrap plastic around their stem?

SweetFunnyCool : Here is a simple and easy way to make your bananas last longer. All you have to do is wrap plastic around the stem. Banana stems release ethylene which causes ripening and by blocking ...
5
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3answers
3k views

Is the mustard seed the smallest of seeds?

From Matthew 13:31-32, 31 He [Jesus] put before them another parable: “The kingdom of heaven is like a mustard seed that someone took and sowed in his field; 32 it is the smallest of all the seeds, ...
13
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1answer
8k views

Is the flavor of artificial banana flavoring based on the “Gros Michel” banana?

I've heard the claim that artificial banana flavoring doesn't taste like bananas since it was based on a different cultivar than the one we know today. Until the 1950's the main banana cultivar ...
18
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1answer
32k views

Will fluoride and chlorine dissipate from tap water left to sit overnight?

One common recommendation for watering house plants with tap water is to allow the water to sit overnight before watering, so that the fluorine and chlorine that are commonly added to tap water (which ...
4
votes
1answer
1k views

Does Impatiens capensis (a.k.a. jewelweed) relieve symptoms caused by poison ivy or other irritants?

As a kid, I was taught during my summer camp that jewelweed, a plant commonly found throughout North America, is an effective treatment for poison ivy and stinging nettle. Indeed, I've used it myself ...
16
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1answer
27k views

Can a plant survive bottled in its own ecosystem for 50 years?

I came across a story on Facebook about David Latimer, who put spiderwort plants into a bottle garden ("terrarium") in 1960, watered it in 1972, and then sealed the bung. The plants have been living, ...
5
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2answers
2k views

Is it possible for a pine tree to grow in your lungs?

This question came up at lunch today, and I didn't believe my friend when he said someone had a pine tree growing in his lungs. I have found several sources: 1, 2, 3 Source #2 has a key note: ...
10
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1answer
1k views

Can plants sense human intentions?

Cleve Backster's experiments on the ability of plants (and even microbes) to react to human thought have been popularized by the book The Secret Life of Plants. There's a very interesting interview ...
5
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2answers
2k views

Do the trees follow Fibonacci series? How?

Does the number of leaves on a branch follow Fibonacci numbers from top to bottom? Or is there more to nature than I really see it. This question came up after reading this article: Aidan Dwyer ...
39
votes
1answer
23k views

Does aloe vera help cure sunburn?

I'm on vacation and got sunburnt, so someone said I should go get Aloa Vera since that apparently helps. There seems to be a plethora of made-for-adsense-sites that claim the same. http://www.care2....
19
votes
1answer
92k views

Plants that release oxygen even at night

It is widely reported at several places that certain trees such as Peepal (Botanical name:Ficus religiosa) and Tulsi (Botanical name: Ocimum tenuiflorum) release oxygen even at night. My understanding ...
6
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0answers
400 views

Does natural corn grow giant?

I was reading the Wikipedia article on corn today, and I noticed this interesting quote in the second paragraph: While natural maize varieties grow to 12 metres (39 ft) tall,[4] most commercially ...
24
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1answer
38k views

Do cacti absorb harmful radiation emitted by computers?

It is a common belief that cacti absorb radiation; consequently, a lot of people put potted cacti by their computer as a safety means. Do cacti actually absorb radiation? Even if so, will a small ...
4
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0answers
1k views

Does catnip repel rats, mice and cockroaches?

Cat-world claims that catnip can repel rats, mice and cockroaches. It was also discovered that catnip repels cockroaches too! and Rats & mice are also believed to have a strong dislike of ...
17
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3answers
9k views

Does grass alone produce enough oxygen for life?

Over a work happy hour tonight, two employees were talking about their different lifestyles -- one likes riding four wheelers, which the other considers to be recreational pollution. Somehow the fact ...
29
votes
1answer
13k views

Do houseplants have any impact on oxygen levels?

I usually hear that plants should be placed in working areas to supplement the higher oxygen needs of working humans, or on the other hand, that should never be grown in bedrooms because they drain ...
11
votes
1answer
9k views

Does celery have an effect on male sexual performance?

There's a popular belief that celery increases male sexual performance (some claim that it influences penis size, others that it increases semen count, or that it helps men maintain an erection for a ...
44
votes
3answers
24k views

Is watering plants under a hot sun bad?

A couple of people have told me that it's a bad for plants to be watered in the middle of a sunny day, i.e. it's not just that you waste more water due to evaporation, but that there are actually bad ...
19
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2answers
49k views

Can eating rhubarb kill you?

I've heard that rhubarb leaves are poisonous, and that you can even die from rhubarb poisoning. Is that true?
28
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2answers
16k views

Does music affect the growth of plants?

According to a very old study plants that “listen” to music have a better growth than other plants. For her next experiment, Mrs. Retallack used two chambers (and fresh plants). She placed radios ...