Questions tagged [botany]

The study of plants and plant life.

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4
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0answers
60 views

Saving a Maize Landrace from Inbreeding Depression

I have 10 seeds of a rare corn landrace. I probably won't be able to acquire more and the cultigen's long term fate is unknown. So, I want to do my best to preserve it for future generations. Corn is ...
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1answer
53 views

What morphological traits can be used to diagnose members of the Eucalypteae?

I read the Wikipedia article on Eucalypteae and it doesn't actually say what these plants have in common. (I am now reading through https://bsapubs.onlinelibrary.wiley.com/doi/pdf/10.3732/ajb.1200025 ...
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1answer
82 views

If stomata is closed at night ,how does exchange of oxygen take place at night? [closed]

In this article in the second paragraph, it is written that the stomata remains closed at night to reduce water loss. We know that the plants respire and take in oxygen at night. Then how do plants ...
7
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1answer
632 views

Identity of plant bearing a cluster of bulbous, glossy red fruits (Oak Ridges Moraine)

Location: Oak Ridges Moraine, Ontario (Durham Region) Date: October 4, 2021 Site: Full shade; hillside; sugar bush
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1answer
54 views

How do plants know to grow towards the light? [closed]

Plants lack a central nervous system. How do they know to drop leaves in full shade and to curve stems towards the current light source?
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13 views

Are all fibrous roots considered as adventitious roots?

I have just started studying about morphology of angiosperms. I'm learning about roots right now and I came across the following: In monocots, adventitious roots are a characteristic feature whereas ...
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45 views

How to find a circumference in which a tree can provide oxygen

I want to make an app which will calculate oxygen rich zone around the tree. Say, for example, 1 banyan tree on average can have more oxygen within 2 meters from its location. Are there any already ...
-1
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1answer
64 views

What are the oldest living plants in the world today? What can you know about them? Why can some plants live so long? [closed]

What are the oldest living plants in the world today? What can you know about them? Why can some plants live so long?
14
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1answer
480 views

How to decipher references in natural history works of the late Renaissance and early Modernity?

Old botany books from the 17th, 18th and 19th centuries (and maybe also some later ones ?) enumerating lists of species use to give references to their own sources as abbreviations of one or few ...
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10 views

Does the generative cell have centrioles?

I have read that most plant cells lack centrioles, though it may be seen in some lower plants. But what about the gametophyte of higher plants, angiosperms specifically? As this diagram shows- The ...
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1answer
63 views

Are there any natural forms of aquatic vegetation which do not stand up in water?

We are carrying out some experiments where we study influence of underwater vegetation on waves. Unfortunately, the stalks of artificial 'vegetation' which we have seem to be too dense (or too stiff). ...
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50 views

What is this bright green spot inside an apple?

I bought four Gala apples at a produce store. When I sliced them with a stainless steel knife, a fresh knife for each apple, after the third slice they each revealed a bright green spot. In the apple ...
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18 views

Why is the author citation of Polypodium porosum (C. Presl) Mett.?

I would like to understand what constitutes a valid taxonomic description of a species in botany and by chance I encountered this example (which I otherwise know nothing about). Either Pyrrosia porosa ...
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18 views

Does Ethylene Triple response provide any advantage to the Arabidopsis thaliana Etiloated seedling,?

As ethylene has a triple response effect on Arabidopsis thaliana Etiloated seedling- 1 Shortening and thickening of Hypocotyl 2 Exaggerated apical hook 3 Short root According to this site Ethylene ...
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0answers
21 views

Why Plants growth has a significant contribution of cell elongation growth?

Plant Growth is characterised by three phases- Cell division , Cell elongation and Cell maturation, where Maturation is just specilisation of cells, Only major contributory effect in growth is of cell ...
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99 views

Is lignification within plants a reversible process? If so which factors can reverse lignification?

Lignification is an important process in plants such as trees to allow for structural rigidity. Is this process reversible by the plant and if so which factors influence this reversibility?
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38 views

Strange yellow flower in shrub Species ID

This is a perinneal plant photo taken in Bhubaneswar ,Odisha .But I have seen the same plant in Andhra Pradesh as well. It's not exactly woody like a tree,but pretty large shrub[taller than me]. What ...
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11 views

How it happened that in cactuses the difference between the fruit, the leaf and the stem so much blurred if they were normal plants in the past?

Looking at a cactus may make impression that they evolved separately from other plants, which usually have stem, leaf and fruit. But the fruit in cactuses has the same structure and surface as the ...
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1answer
90 views

What is the botanical definition of a tree?

I recently saw a shared post on Facebook which states Trees - even a young child knows what a Tree is, however there is surprisingly no universally recognised precise definition of what a tree is, ...
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0answers
22 views

Pink and white flower species ID

I found these small plants growing after the rains in July .In Bhubaneswar , India. What species is it?
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1answer
35 views

Tiny deep red flower shrub species ID

I found this plant with maple like leaves blooming after rains this july.I am in Bhubaneswar,India.
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16 views

Flowering climber species ID in Odisha

I found this pink climber on a tree , in Bhubaneswar,India. It started blooming around july .
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1answer
55 views

Can you please help me identifying these parasite (eggs?) on rose?

My aunt today saw the following objects on roses in her garden and asked what it is but nobody could tell her yet, but it seems to be some kind of parasite or some caterpillar eggs. As you can see, ...
2
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1answer
37 views

Can anyone identify this seed, pit, or nut?

I found this on the recessed top of the intake manifold of my car engine. It may have been there for weeks. It was likely brought there by a rat or squirrel who was unable to chew through the outer ...
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0answers
46 views

Make plant experience 2 growing seasons per year by moving it across equator semiyearly

If I take a typical plant (such as e.g. a rosemary plant or an avocado sapling) across the equator from Florida to Brazil and back every year, so that the plant experiences Spring in both places, will ...
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55 views

Do some flowers excrete urea or uric acid?

Sometimes when I sniff a flower up close, I can't but help smelling a faint urine like odor. From my layperson's understanding, uric acid and urea both are responsible for giving urine its ...
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48 views

Why does wheat consume more water than rice that is, unlike wheat, flooded?

Why does wheat consume more water than rice that is, unlike wheat, flooded? I thought rice was the villain of the piece when it comes to water consumption.
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14 views

What is the current accepted taxonomy of the Citrus genus, and how do common cultivated fruits fit into it?

I want to learn about the taxonomy of Citrus, and how cultivated fruits fit into it. I know that the history of cultivated citrus fruits is full of hybridisation and that the taxonomic classifications ...
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2answers
63 views

What is the interchange of nutrients between plants called?

I've heard about how fungi is the nutrient super highway of the plant web. What is this interchange between plants and the fungi called?
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1answer
67 views

Can anyone identify this Australian tree?

This tree is found in the Wrights Hill area on the New South Wales/Australian Capital Territory border. Bark at breast height is curled and dense, becoming less dense at height.
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6 views

How do nodes form in plant stems?

How does a plant "decide" where a node will form in its stem? What is the difference on a cellular level between the node and the internode sections of the stem?
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1answer
57 views

Fluorescent purple flowers?

Do some flowers fluoresce? Some deep purple Lobelias and larkspurs seem to glow and confuse my eyes in sunlight. It reminds me of those blue LED Christmas lights (they come in strings with other ...
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0answers
43 views

Is it even possible to cut just the phloem from the stem of a plant?

I often see questions related to this kind of diagram: Basically, the diagram shows a that phloem is removed from the stem in the middle of the plant. Thus, the stem swells because food produced by ...
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55 views

What is causing these lichen patterns on a tree in Scotland?

I recently saw these lichens growing on a tree in Scotland. What is causing the pattern of dark lines? Are these the boundaries between individual lichens? Or could it be something to do with the ...
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48 views

Blooming at moonlight

At the moment a popular question in the physics SE community is about night-blooming cereus: this flower blooms at full moon, that is it is capable of making difference between the moonlight and ...
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20 views

Evergreen ornamental shrub identification

These images were taken in the middle of April in central Poland. Plants are between 0.5 and a meter tall, and around a meter in diameter.
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0answers
25 views

What causes the distinct color change in matured leaves in some plants?

Maybe that color change is caused by lower chlorophyll concentration in younger leaves' cells, or chlorophyll a to b ratio differs between younger and older leaves. All I could find is that the ...
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43 views

How can I learn botany/plant ID by myself?

I am interested in sources and methods regarding botany and plant ID, and being a self-taught person. Textbooks, sites etc. Thank you all in advance!
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55 views

Can Monsanto's (in)famous hybrid seed crops be cloned/grafted? If not, is there a technical or legal reason?

I understand that the seeds of a crop made from modern-day super hybrids will not, usually, produce the same quality plants in the next generation. Therefore, farmers have to buy new hybrid seeds each ...
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0answers
14 views

Sansevieria falling back to the wild form via leaf cuttings but not via micropropagation

I have heard that when you propagate Sansevieria via leaf cuttings, you get the wild form again. But if you use only meristem tissue, you can propagate the multicolored cultivated forms. What would be ...
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16 views

Variance components and heritability

I have a quantitative morphological data comprising of both growth and yield traits. In my heritability analysis, i discovered that some of the traits have negative variance component and heritability ...
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0answers
11 views

How does a diploid sporophyte form in non-recurrent apomixis?

I came across this definition of non-recurrent apomixis which occurs in angiosperms- In non-recurrent apomixis, both the egg-cell and embryo are haploid and embryo is developed directly from an egg-...
5
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1answer
157 views

Different flowers have same colour

I notice that certain (wild) flowers have the same colour, although they are not closely related. For example, the yellows of the dandelion (Taraxacum) and the buttercup (Ranunculus) are, at least to ...
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1answer
99 views

What are those berry-like plants in this photo?

I found this photo on a Flickr gallery and I have no idea what this plant is. Is it supposedly a type of berry or something?
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51 views

What actually kills a plant that requires winter dormancy if it is kept indoors all year?

In bonsai practice, beginners will commonly purchase a juniper (often Juniperus procumbens 'Nana'), which is an outdoor tree, and keep it inside all year. The tree invariably dies. It is commonly ...
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54 views

Do some vascular tissue cells have chloroplast? [closed]

Vascular tissue includes xylem, phloem, parenchyma, and cambium cells. Does photosynthesis occur in some vascular tissue cells? Do some of them have chloroplast? Vascular tissues are made up of xylem ...
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34 views

Sex of fern gametophytes

The following image is from Campbell Biology, 12th edition It says, "Each gametophyte develops sperm-producing organs called antheridia and egg-producing organs called archegonia". This ...
4
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2answers
111 views

Is this some form of cabbage?

I would appreciate if someone could identify this plant. It's tall, but not very difficult to pull from the ground, and it has yellow flowers in large groups. I was told it's not mustard. Is it wild ...
2
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1answer
85 views

What are these needle-like plants growing in the ground?

I was outside and noticed some strange, needle-like plants growing on the ground. I managed to search for "needlegrass" but couldn't find it. Here is the photo taken on April 20, 2021 in ...
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31 views

What is this plant with yellow large fruit?

Found this in a garden in San Francisco. Can't decide if it's pomelo, capri lemon or something else, ideas?

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