Use this tag for questions that ask "what is this thing?" Pictures are helpful, as are descriptive titles. When you get an answer, consider adding a further tag (for the flower, tree, beetle etc that has been identified) so that your question is cataloged correctly. If the question is about ...

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56
votes
8answers
95k views

How do you identify a plant?

I'm pretty new to gardening and landscaping. Having recently bought a house, one of the things I'd like to be able to do is identify the trees and smaller plants that are on the property so I can ...
26
votes
4answers
14k views

How can I tell if a plant given to me is patented?

Sometimes, I receive an unlabeled plant start from a friend, and they do not know if it is patented. If I want to grow and sell a plant in question, is it okay to just take the chance, or is there a ...
22
votes
7answers
22k views

What are these hard white/brown spots growing on my houseplant?

A little more then an year ago I got six palm trees (two vases). It was the Californian equivalent of an Areca palm (the guy in the nursery suggested this one after I asked for an Areca for its air ...
19
votes
6answers
4k views

What is this vine-like weed and how do I kill it?

I have a viney weed growing in my yard. Weed and Feed doesn't seem to affect it. It's slowly spreading to more and more of my yard every year. What is it, and how do I kill it?
18
votes
3answers
923 views

What is this fast growing plant with blue/black berries?

In my garden a strange plant is growing at an incredible speed and I can't identify what kind it is. It broke through end of June and within two months it grew about 1.8-2.0m high. It now carries ...
17
votes
3answers
5k views

What is the name of this weed with red/green leaves and little white flowers?

I haven't been able to identify this weed which is prolific on the gravel (and garden beds) on the rooftop of my 10-storey condo building in downtown Vancouver, BC. Can anyone identify it and let me ...
16
votes
1answer
1k views

How can I identify and eradicate poison ivy, poison oak, and poison sumac from my yard?

Every summer despite my best attempts to be careful, I end up developing a nasty rash due to an unfortunate encounter with poison ivy while doing routine yard work. How can I best identify poison ivy,...
16
votes
2answers
1k views

What kind of plant/mushroom is this?

Two days ago I noticed this thing growing semi-covered in my garden near a grapevine: As you can see, it was light purpalish - light pinkish kind of colour. On touch it was a bit soft, and the ...
15
votes
4answers
2k views

Does anyone know of a somewhat comprehensive plant database available online?

As a gardener I've found that doing some paperwork while gardening really assists in keeping things organized and on schedule. It occured to me the other day as I stopped to check my beeping phone ...
14
votes
3answers
997 views

Is this heavy blue-green growth on my tree trunk and branches a form of lichen?

I have a tree with a fairly heavy growth across its trunk and branches; I suspect that it's a form of lichen but I'm not sure. Is this something that will negatively affect the growth or health of ...
14
votes
2answers
890 views

What is this shrub and has it come back from the dead?

We had this deciduous shrub in our lawn for many years. Its height was about 1.5m - 2m. This photo is from a couple of years ago. Strange thing is that this spring it seemed to have died. We ...
13
votes
2answers
2k views

What is the purpose of this bundle of sticks?

A friend of mine has bought a garden in Dresden recently. The previous owner has left a few strange bundles of sticks hanging around, but we can't figure out what their purpose is. Any idea?
13
votes
2answers
340 views

What is this Vine-type plant growing on my Jacaranda tree?

I have a vine-type plant that is growing on areas of my Jacaranda tree (me + the tree live in Australia). It has little leaves. The roots of the vine grow on the outer-layer of bark on the tree. Does ...
13
votes
2answers
9k views

How can I identify an apple variety?

We put in four young apple trees a few years ago, two cookers and two eaters, four different varieties. Now that those puny trees have grown up and started to produce a substantial crop, we're ...
13
votes
2answers
566 views

What is this large flat leafed plant with yellow flowers (central Missouri)

I live in an apartment building, and my landlord has neglected to mow the back yard for quite a while now. In this time period this unknown plant that I've never seen before has grown to a height of ...
12
votes
3answers
103 views

What is this bug on my adenium plant and what should I do?

I have a dozen adenium plants and on a few of them these mysterious bugs appeared this morning. It's winter season here, the current temperature is ranging between 7°C to 20°C (45°F to 65°F). What ...
12
votes
1answer
986 views

What is this monster weed?

What is this monster weed? It grows back every year and I yank it, but I can't dig out the tap root because it's too close to the gas line. It is in Norfolk, VA, USA in full sun. I'm kind of ...
12
votes
1answer
620 views

What are these spots under the leaves in my cut flowers?

I have got a bunch of flowers, and under the leaves I noticed that there are a lot of spots. I do not know what type of leaves they are and I am not sure if the spots are eggs. Should I be worried ...
12
votes
3answers
2k views

What is this long-rooted vine in my yard?

I'm in Massachusetts, and recently moved into a new house. We have a vine in the yard which I have been having trouble identifying so far, and I was hoping someone here might know. It has not yet ...
11
votes
3answers
1k views

What are these viny plants? Are they poisonous? [closed]

These plants are located alongside a fence in my backyard. What are they? My biggest concern is that they might be poison ivy. However, the plant in the first picture closely resembles a vine that ...
11
votes
2answers
5k views

What is this weedy grass and how can I control it?

I have a grassy weed with flowering seedheads at the top. What is it and how do I get rid of it in my yard?
11
votes
5answers
927 views

What is this large leafed plant?

I like the way it looks and might want to get one but I need to know what it is. The location is Minnesota.
11
votes
3answers
5k views

What are the teeny tiny white bugs on my tomatoes?

The bugs are exceptionally small. I've included a video here. It may be related to the stretched and disfigured appearance of my tomatoes.
11
votes
1answer
244 views

What is this plant with red-pink lines/veins on its big green rounded leaves?

My mother bought this plant but she didn't bother to even ask what was its name and what type of care does it need. Can any of you identify it, so that we can find info about the proper care it should ...
11
votes
1answer
3k views

What is this plant with red, green and yellow colored leaves and little white flowers?

I'd like to get a hint to identify the beautiful plant with red, green and yellow leafs in the picture below. The color of the leaves has been like that since the plant has been there (at least since ...
11
votes
2answers
398 views

Hexagonal bush?

I have seen the pictured bush today when hiking around Las Palmas de Gran Canaria. From a distance, hexagonal patterns are visible: Adjacent branches grow in an almost perfect 45° angle relative to ...
11
votes
1answer
106 views

How do I link a specific garden plant to its native plant community?

If I have a garden plant, say for example, Herniaria glabra, and I want to identify its native plant community, i.e. the dominant species, associated species, soil, climate etc., how do I go about ...
11
votes
1answer
149 views

What is this plant growing all over my backyard?

These plants/weeds are everywhere in my garden. Could someone confirm whether they are weeds or a plant (ground cover perhaps)? They are slightly different as you can see one of them has an actual ...
11
votes
1answer
1k views

Tomato plant looks like it has grains of salt - what is it and how do I treat it?

My cherry tomato plant has been showing some yellowing of leaves over the past week or so. Just today I noticed the formation of these cluster of white granules - not sure if it's connected to the ...
11
votes
1answer
160 views

Please help me identify this tree with irregular leaves

I found this tree growing on a farm on the outskirts of Johannesburg, South Africa. p.s. The pink fabric is not part of the tree :p
10
votes
3answers
861 views

Is this plant some kind of Poppy?

I'll start by saying I'm by no means a gardener and I usually kill anything that's green and lives in a pot, however I'd like to say this one is doing well, judging by its height. It no doubt needs to ...
10
votes
4answers
764 views

Do clovers cause any problems?

I have a lot of what I think is Clover in my garden. Should I be concerned?
10
votes
6answers
1k views

What is this weed and how can I eliminate it?

I live in Nova Scotia, and I have been fighting with this weed for at least 7 years. It is in my flower garden. I have gone so far as to try to follow each of the white roots though the soil and ...
10
votes
3answers
567 views

What could this object in a tree be?

This is in a domestic garden, in Cornwall, UK. What is it?
10
votes
1answer
276 views

What is this red corn-like fruit?

I've had these in my garden for years but only saw the inside of one today. I remember seeing something like this in a salad once. What is it, and is it edible?
10
votes
2answers
392 views

What kind of pepper is this and when will it be “ripe”?

What kind of pepper is this and when will it be "ripe"? The peppers are a bit larger than a cherry tomato (maybe apricot size). UPDATE: The peppers turn red after they ripen.
10
votes
5answers
18k views

Please help me ID this apple or apple-like bush/tree in my yard - Small green apple with no stem and thorns

I have lived in this house for many years. I have always had a bush behind the shed that I couldn't identify. I always knew it was green most of the year and that it had thorns but that was about it....
10
votes
2answers
2k views

What is this plant with long sharp leaves? Is it a weed?

In my garden I have several of the plants shown below. At first I thought it is a weed, but then it was quite robust against cold weather and continued to grow slowly: The leaves are long and sharp, ...
10
votes
5answers
3k views

What is this large furry leafed plant with purple stalks, found in the UK?

Does anyone have any idea what this is? It looks too substantial to be a weed
10
votes
1answer
231 views

What is this houseplant with dark green linear leaves?

I can't seem to identify this little guy.
10
votes
1answer
9k views

What are these swirly green growths inside my bell peppers?

I occasionally discover swirly green growths inside my bell peppers, such as the ones pictured below. What are they exactly? Are they edible?
10
votes
1answer
318 views

What is this flower with purple and white petals that roll up to form a tube?

I found this very cool looking flower but have not been able to identify it. If you know what it is called please post your answer. Thanks.
10
votes
3answers
834 views

What is this tall plant with large leaves and long bunches of soft pink flowers?

Please can you help me identify this plant. The flowers are soft to touch.
10
votes
1answer
272 views

What is this low-growing evergreen?

I found this plant in my woods And would like the identification. It is a small woody evergreen that grows in dry soil in light to deep shade. It grows about 1 1/2' tall and has small clusters of ...
10
votes
2answers
707 views

What is this pink flower with dark green leaves?

Any help would be appreciated, thanks!
10
votes
1answer
393 views

What is this itch-inducing twig I found in my cilantro?

I bought a bunch of cilantro today at my usual produce market and when I picked it up, I felt a couple of pricks on my fingers that started itching a lot. When I got home and started preparing said ...
10
votes
1answer
2k views

What type of squash is growing out of my compost pile?

I didn't turn my compost pile this spring, and had an unexpected surprise that's been growing for the last few weeks. Can anyone identify what it is? I'm almost 100% sure it's some type of squash, but ...
10
votes
1answer
1k views

What insect/disease causes lemons to look like a Cthulhu and how can this be prevented?

Earlier today, pictures of weirdly shaped lemons were shared on reddit. The top comment there says it is a case of citrus bud mites, which actually seems to make sense. My questions are: Is this ...
10
votes
1answer
2k views

What animal is eating my cherry tomatoes and strawberries?

My garden (first ever!) has been doing great. Yesterday I harvested my potatoes, which left half the garden open and bare. Some critter seemed to view this now-open landscape as an invitation to come ...
10
votes
1answer
268 views

What is this 'bleeding' mushroom?

I photographed this weird looking fungus growing out of an open cut in a tree (not sure what type of tree it was) on my parent's property last weekend in central Texas after some heavy rain. The ...