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The study of plant life; e.g. angiosperms, gymnosperms, bryophytes, pteridophytes, and algae.

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Hypanthial disc

Can anyone illustrate what the hypanthial disc is? It is descriped throughout the key to Rosa in the Flora of North America. I think that I understand that the hypanthium is the hip which is formed ...
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Why sometimes we can see the core inside the vacuole?

Why is it that we can sometimes see the core inside the vacuole? I tried to understand it and i have some answers but I’m not sure and i want you to answer me Thanks
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Why plant tissues end in -enchyma?

Many plant tissue types end in the affix -enchyma. Etymology: enkhyma "infusion," from en- "in" + khein "to pour" Examples are parenchyma, collenchyma, and sclerenchyma (meaning "to pour beside," ...
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What is a section in botany based upon?

I am a bioinformatician working with plant data. Therefore my formation on plant biology and botany is "ok" but not very strong. When people talk about sections, I know that they talk about a ...
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Do plants produce more anthocyanins if they are stressed in comparison to if they receive signals suggesting neighbors are stressed?

Plants produce anthocyanins, tannins and phenols in response to a variety of stressors that they experience. Is there any evidence that in response to indications that neighbors are stressed, plants ...
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23 views

Evergreen drupes?

What are some evergreen drupes--specifically stone fruits, unless all drupes are considered stone fruits? Are there any that produce fruit year round (or at least both in Summer and Winter)? Thanks!
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1answer
58 views

What is this strange-shaped fruit?

The fruit has form of a cube or icosaheder. It is green but quickly becomes black. The meat of ripe fruit is easily separated from the seed, is sweet and tastes as dried plum. The seed has strange ...
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Should the infraspecific epithet agree in gender with the genus name?

Let's take the following plant name Gymnocalycium mihanovichii So we were to designate the yellow form of the plant, would it be Gymnocalycium mihanovichii f. aurea because forma is ...
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43 views

Why is amylose insoluble in water?

In a handout the following is stated: Amylose is insoluble in water, therefore a good storage compound e.g. in stroma of chloroplasts This is with regard to the chemical structure of the molecule. ...
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Is flowers nectar secreation influenced by bees/pollinators?

Nectar secretion by flowers is influenced by many environmental factors e.g. water supply and air temperature [1]. My question is: do bees (or any other pollinator) influence it too? I can imagine ...
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Polycotyledonous seedlings and how these plants look like when they grow up

Occasionally, seeds I germinate may show three or even four cotyledons instead of the usual two (for the dicotyledonous clade). It is angiosperms I am talking about, and not gymnosperms which may ...
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2answers
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Confused about plant phyla

My kids and I are doing a fun project collecting pictures of life in parks and national parks around us. We are trying to classify what we find down to genus and species. However, I'm confused about ...
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Recording of the hissing sound a banana plant makes?

I have heard that a banana plant will make a hissing sound when the fruit pops out by breaking the layers that it grew in (like a husk). Is this true? If it is can someone provide a recording from a ...
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24 views

What's this growing out of my squash?

This weird bubble filled with liquid was growing out of my butternut squash. Can anyone tell me what it is?
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5answers
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Examples of plant families that contain species that are safe for human consumption and species that are poisonous to humans?

I am trying to make a point to someone that just because two plants share a family and one plant is safe for human consumption, it does not follow that the other plant also is safe for human ...
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Can fruit be affected by antifreeze in soil?

Due to an accident about 2L of car antifreeze (ethylene glycol & corrosion inhibitors) was spilled around the soil at the base of a fig tree. I am wondering if there is any way the antifreeze can ...
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1answer
26 views

Regarding plant stress

I have to plan a bioinformatic study on a plant. Microarray data is available for various stress treatments (drought, cold, osmotic and flood stress) on root and shoot tissues. I am a bit confused as ...
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1answer
55 views

Identifying a shrub with unusual “many shoots” growth behavior

While recently hiking in the southern mountains of New Hampshire, we came across a plant, and some of them were exhibiting what we interpreted to be a disease, or least unusual growth. On some of the ...
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Why sansevieria trifasciata could purify air pollution?

Usually, normal plant only need carbon dioxide and release the oxygen to produce sugars. In some articles, they said that sansevieria trifasciata sequester the pollution to its root or just keep it in ...
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1answer
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What is the function of Xylem parenchyma?

why xylem need parenchyma cells ihave read these cells are connected with xylem by plasmodesma i know that plasmodesma is to connect between cytoplasm of two cells and xylem is dead so what is the ...
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Determine planar phyllotaxis characteristics

Is there any method to fast and precise count the number of spiral and the divergence angle on a planar phyllotaxis pattern? The example of spiral phyllotactic arrangement of emerging flowers on ...
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2answers
164 views

Are bananas C3, C4, or CAM plants?

Are bananas C3, C4, or CAM plants? I have been researching for some time and cannot find the answer.
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1answer
90 views

What is this fruit?

There is a hairy hard shell (looking like a small kiwi), which naturally breaks, and under it there is brain-shaped red sweet flesh, half-covering the smooth black seed. Picture taken in the ...
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Please help to identify this shrub

Please help to identify this shrub in Hong Kong: - dark green fruit with white spot - fruits cluster at top of stem - upright growing of green leaves The shrub was from Hong Kong MacLehose Country ...
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Should plants absorb nitrogen in a linear fashion - if not why?

I did an experiment that measured the change in concentration of nitrate overtime (in the water of hydroponically grown tomato plants) and the results don't seem to make sense. The concentrations as ...
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2answers
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Can anyone identify these flowers?

I'm mostly interested in the maroon and white ones in the center, or the purple and white ones in the front left corner. They were in bloom in a garden in July at the Buffalo Harbor. Any help would ...
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1answer
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Are turkish hazelnuts edible?

The title of this question is Google suggestion verbatim, when I tried to write it. Yet, I found no answer specifically for Turkish hazelnuts. Turkish hazelnut is a tree and it's fruit looks ...
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1answer
55 views

Identification of red, plum-like fruit (probably from Southern Russia)

My parents are currently on a holiday in St. Petersburg (Russia). They sent me this photo of plum-like fruits they bought on a market there (toilet paper for scale, I guess). The fruits are 20-30mm ...
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can “Pandanus amaryllifolius”[used in cooking] become poisonous if grown near drainage

how do they absorb wastes and become not suitable for eating
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1answer
26 views

Test question regarding botany

I'm having a hard time understanding what exactly those letters and numbers in the task in the photo below represent, also the task says "Is the blossom formula written correctly?" translated from ...
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29 views

What is this Plant

What is this plant? It grows in the south of Ukraine
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1answer
91 views

What is the big plant with white flowers on the photo?

What is the 3m tall plant with white flower? It is from Central Europe and there is a creek near to it. I have a guess, but I want to know for sure... Is the small one the same species? More high ...
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1answer
124 views

What is this Las Vegas area weed?

This is a picture I took of my mystery weed out by Pittman wash in Henderson NV earlier this year. From my experience this last year, I assume that the plant turns red later in the year and loses the ...
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1answer
20 views

Stained chestnut tree leaves

The leaves of the chestnut tree in our back yard have, for a while, developed these stains on them: ..which don't appear to be a normal feature of this tree's leaves, at least according to the ...
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Can a polyploid be a “clone” of a single parent?

I still need to learn more about the different mechanisms for polyploidy, but from what I can tell, a polyploid can be an exact clone of the parent, except that its chromosome count has doubled. If ...
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Grape ivy tendrils

I have a peculiar question. I keep a grape ivy, Cissus alata as a houseplant and I cannot but wonder what exactly makes it decide to grow tendrils? most offshoots have none, only one leaf growing from ...
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Are there any plants that parasitize on animals?

It seems, fungi often infect animals, while plants it seems, never. Is it because the cellulose cell walls make them incompatible with animal tissue?
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1answer
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Which strange fruit is this?

Yesterday, my brother brought a strange fruit resembling Lychee (but much bigger in size). Here is a pic of it: When cut it, it had smell like banana and fibers were like of the chicken meat, though ...
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2answers
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Unknown plant, can anybody identify this plant?

Location: Western Germany Can anybody identify this plant from Germany ?
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Is this 12+ foot plant a sunflower or hogweed?

I'm trying to determine what this is. The plant is well over 12-feet tall, had huge leaves, and a very thick stalk. People near me say it's a giant sunflower plant, but it hasn't bloomed or shown sign ...
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1answer
226 views

What is the scientific name of this tree?

The tree flowers prior to the monsoon season and sheds it's leaves in Winter and regrow them in Spring and Summer. I have seen three different colours of the flower (growing in my neighbourhood): pink,...
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Can someone identify this Brazilian flower?

The photo was taken in january 2004, at Parque Estadual do Rio Preto (Black River State Park), in the Cerrado (savanna-like) of northeastern-central Minas Gerais, Brazil. The plant was herbaceous/...
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1answer
89 views

What is this plant, and is it edible?

After I planted some spring mix lettuce a couple of years ago, nothing survived except for this plant. It doesn't look like any of the leaves that I am used to. Does anyone know what it is? Is it ...
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1answer
19 views

White resin or powder on conifer needles

I often notice that certain conifers often have a whitish powder on what seems to be their youngest needles, giving them a blue green tint. Does anyone know what this is? Is it something excreted by ...
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1answer
57 views

Succulent weed identification

There is a succulent-looking weed growing in a crack in my driveway. What is it? Conditions: Dry, full sun, asphalt & gravel, no competition. Date: 2018-07-16 Location: Toronto, Ontario, Canada ...
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1answer
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How do plants absorb CO2?

I see many repeated claims that plants absorb $CO_2$ from the air. $CO_2$ goes into the stomata, while $H_2O$ evaporates and leaves those same stomata. The $CO_2$ dissolves in the water in the plant ...
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Can you recognize this grape?

This gorgeous and sweet grape I collected in central Italy. I would like to know the name of this variety to get more information about it. I tried to compare with some pictures in Google but I am no ...
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2answers
146 views

Where can I find a picture of the inflorescence of Epipremnum aureum (golden pothos)?

Epipremnum aureum (golden pothos) is a very popular house plant - attractive and almost impossible to kill. Also, it is a flowering plant with flowers produced in a spathe up to 23 cm (9 in) long, ...
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2answers
153 views

Can you accelerate the growth of a plant by accelerating its surroundings?

I had this weird idea of making plants grow faster when I first visited an indoor nursery which used floodlights instead of sunlight. They turned on during the day and went off during night in cycles. ...
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1answer
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Identify the fluff that I have found in tea

I have just opened a new pack of a black Pu'er tea that I've bought at the local store selling it by weight, and found a piece of fluff in there. To me it looks much like some kind of a bird fluff. It ...