Questions tagged [botany]

The study of plants and plant life.

247 questions with no upvoted or accepted answers
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89 views

What species is this aromatic plant found in a mountainous region of Greece?

This plant was found in the Taygetos mountains, Greece, and had a lemony smell. Small plant about a foot high. The shiny recurved leaves are reminiscent of rosemary, and the dry seed-heads seem ...
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106 views

Can anyone identify this seed or nut?

I found many of these nuts in a botanical garden in Sweden (outside, not in a greenhouse) but was unable to find the plant it belonged to. The garden has species from all over the world. I don't ...
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138 views

What is the name of this plant or shrub?

I just found a plant in India. Here is its leaf. I tried looking it up on flowers of India & wikipedia, but both databases are too much to read manually. Physical description: Each Stem has 6 ...
5
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1answer
116 views

Why does water stress lead to alkalinity of xylem sap in plants?

I was reading this book: Plant Physiology and Development, Sixth Edition by Lincoln Taiz, Eduardo Zeiger, Ian M. Møller, and Angus Murphy when this doubt came to my mind. Abscisic acid, the stress ...
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62 views

What are these balls in meshopyll cells? [Plant biology]

Anybody knows what are these small balls? The picture was collected with a confocal fluorescence microscope. These balls have a green epifluorescence and they are in mesophyll cells of rice leaves.
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180 views

How many cells are there in the apical meristematic tissue?

How many cells are there in the apical meristematic tissue? Looking at this picture... , I would tend to think that there are few hundreds cells in the meristem tissue. But I guess this is a picture ...
4
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48 views

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," "...
4
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1answer
135 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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111 views

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?
4
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184 views

Plants anti-aging process

Every cell has its division limit. But plants cell looks like don't have it (like Sequoia sempervivens D.). I searched a little for it but what I have found didn't help to answer my question. I found ...
4
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63 views

Do leaves grow larger by adding cells at the centre or at the edge?

I'm writing a paper on wrinkling of plant leaves. For biological and physical background information, I would like to know whether leaves grow by adding cells at the edge, at the center or in a ...
4
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112 views

What is the name of this South India plant?

Location: South India. Month: June. Branches of the tree: Lower part of the Plant: Plant's leaf: Whole plant:
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453 views

Do plants have cellulases?

I can't seem to find the answer to this. Not even Wikipedia could help- it mentioned bacteria and fungi that have cellulases but not plants. Using my own reasoning, I would think that On the one ...
4
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138 views

Is this pollen?

The small round "pockets/buns" in the image. I am almost sure it is, but maybe someone knows more. Sample comes from (50.156992, 12.532546) (Google coordinates). It is a re-cultivated tailing in the ...
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178 views

Can someone identify this tree?

It appears to be a kind of fig tree (perhaps similar to the fiddle leaf fig tree but without the fiddle?), although the leaf shape doesn't match. It didn't seem very appealing to eat (!), it was ...
4
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29 views

Why do shed and brown poplar (Populus) leaves get an iridescent blueish colour when wet?

When the brown leaves of poplars shed on the ground stay for a while under wet conditions (e.g. like in a puddle), they become a fascinating iridescent blueish colour, which is best seen when light ...
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388 views

Aloe species identification

I am trying to find out which species these are. Someone claimed they were Aloe Vera, but I am skeptical as I have never seen Aloe Vera with that kind of growth. These look more like Aloe Juvenna to ...
4
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87 views

Do ginko trees grow well in Eastern North America (specifically Ontario,Canada)

I have recently noticed many Ginko (Ginko biloba) saplings planted in my Eastern Ontario city (in Canada), and they are looking a bit sickly, with yellow leaves. They seem to be a popular choice in ...
4
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469 views

Mating types in fungi (and somatogamy)

I would have some related questions about the mating types of fungi. Does a single spore generate a mycelium possessing only one mating type? If it does not in general, do Ascomycota and ...
4
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1k views

Pits and Pores in Vascular Tissue

What purpose is served by the pits and pores in xylem and phloem cells? I cant find what purpose that these components serve in the vascular tissues in plants
4
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1k views

Why are watermelons sweeter in the center?

Today I had a slice of watermelon and when I reached the outer parts of the pulp I wondered why those are less sweet. Whether or not the sugar occurs in crystalline form in watermelons is still an ...
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73 views

Why is this dry pepper fruit still “powered”?

Check out this photo of my pepper plant this cloudy morning: (click for full res) Usually (and this can be seen on 2 and a half of the 4 fruits in this pic) the fruits are "disconnected" from the ...
4
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1answer
73 views

Can there be an equilibrium between humanity's increase of carbon dioxide output with plants since plants harness CO2?

Is it possible that, prior to hitting a thermal equilibrium in the atmosphere, the increase in CO2 that humanity puts out every year will come to an equilibrium due to the consumption by the world's ...
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55 views

What is the name of this flower (on a tree)?

Here is a photo of a big red flower-like structure on a tree on Lama Island, close to Hong Kong. Does anyone know the name of the tree and what the black "berries" are attached to the "flower"?
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24 views

How does a heat-ratio sap flow sensor work and how invasive is it?

The Gizmodo article Undead Tree Stump Is Being Kept Alive by Neighboring Trees says: Leuzinger and Bader stumbled upon the stump while out for a hike. The woody stub caught their eye because callus ...
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186 views

Regulation of LBD33 genes Arabidopsis. If LBD 33 gene is up-regulated by auxin then why does expression decrease when increasing auxin concentration?

I have a question regarding the regulation of lateral boundary domain genes in Arabidopsis (specifically LBD33). I am an undergraduate student trying to understand the results of a lab where I measure ...
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28 views

Is this a Loranthus Europaeus?

Location: Austria, Vienna Ottakringer Wald Date: Feb 8 I found something beneath a tree with epiphyta , which I thought to be Viscum album but is vividly yellow instead of white and I found no ...
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31 views

Pre-linnaean names, where can I ask about current IDs?

I run a large website with lots of historical herb books. For the older ones, finding out current botanical names is very difficult. Can I ask here? If not, does anybody know where I could ask what ...
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50 views

Berries ID - Can someone help us identify this plant?

Found it in the hilly areas of Meghalaya - a state of India. Not sure if is edible or not, we haven't tried it but it gives a beautiful blue color when used for dying. The seeds are big and there ...
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23 views

Looking for realistic representation of angiosperm sperm cells during pollination

I've scoured Youtube, google, and a handful of my botany textbooks for a cellular-scale photo, animation, or video illustrating an angiosperm sperm cell during pollination/fertilization. ...
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47 views

What is a good approximate functional form for an equation relating plant growth to sunlight?

Question is in the title. I've got daily measurements of daily mean shortwave radiation at the surface, and annual measurements of plant growth (some measure, be it height or biomass or something). ...
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61 views

Can someone identify this plant

Growing in a garden in the philippines Photo from above notice the unusual leaves Photo showing bloom... In peak bloom... Photo showing pod that plant produced at the same time blooms appeared
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96 views

Recent research in bioluminescence powering photosynthesis?

In 2013 there was a Chinese study published on "Bioluminescence as a light source for photosynthesis," which is briefly summarized in this Chemistry World article. There was a question on Biology.SE ...
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90 views

Is this a texas sage?

So for a project in one of my classes we must identify two monocots and two dicots growing at our school. We've managed to identify all but one: So more information: My school is in southern nevada ...
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66 views

What amount of light energy is required to produce one O2 molecule? How about one molecule of NADPH?

I know that for each O2 molecule, a total of 8 photons are required (4 per photosystem). Would the amount of light energy required be E=hc/wavelength using 680 and 700? Or would the energy from the ...
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209 views

Can a dead tree root still draw water?

Can a tree whose roots have died due to whatever reason, let's say due to ringing, still draw water up? I personally doubt so but I believe that since all forms of conducting water up a plant requires ...
3
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48 views

Please help ID this plant

Can anyone please identify this plant and confirm if the species is Synsepalum dulcificum (Miracle fruit)? Pics were taken near my house in Bangalore. Because the miracle fruit plant is not native to ...
3
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0answers
109 views

What plant is this? Edible, tastes like cress

My girlfriend got this at a Turkish supermarket in Berlin. It tastes like garden cress or a bit like radish. I looked up cress varieties but couldn't find this particular leaf shape.
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140 views

Can someone please identify this plant?

Photo taken April 27 in Savannah Georgia
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81 views

What is this plant which looks like “marjoram”?

Place is India. We are confused about the identity of this indoor plant. My friend is saying plectranthus, possibly barbatus. I am saying it is marjoram. Which is correct name for this plant?
3
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197 views

Why does Fallopia Japonica not cause issues in Japan to where it is native unlike other countries?

Fallopia Japonica (also known as Japanese Knotweed), is currently causing a huge issue in the English countryside where it was introduced. This is due to the fact that it spreads and grows rather ...
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0answers
76 views

What is this beautiful pink flower plant seen at Bodnant Gardens?

Seen at Bodnant Gardens, North Wales UK.
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23 views

Why do certain ferns have roughened spore surface?

Ferns such as Anemia phyllitidis, Blotiella lindeniana, Ctenitis hirta, Cystopterix fragilis, Hemionitis palmata and many others have roughened splity spore surface. I ask, why is it evolutionary so?...
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144 views

For which taxonomic levels are xylotomical, embryological, and palynological evidence each most useful in determining species relationships?

From the 2010 USABO Semi: In plant systematics, three lines of evidence may be useful in determining relationships; xylotomical (wood anatomy), embryological and palynological. Match these ...
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56 views

Why some plants flower in different seasons

I know how it work (Photoperiodism) but i wonder why all plants can't start flower in spring? Is it connected with ecological niche?
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498 views

How do coyotes remove cactus needles from their paws?

Here, in Arizona, coyotes roam and hunt in the desert. While hiking with dogs, I often see spiny bits of Teddy bear cholla cactus on the ground. Dogs often step on these and get stung by the ...
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118 views

What is the species name of this plant?

Rubbing the leaves between your fingers feel strong, pleasant aroma of citrus. The leaves are not fuzzy and are about 2 cm long. In Germany.
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118 views

Terrarium Compatibility: Millipedes with Carnivorous Plants?

I have a child that loves his large millipedes (Desert Millipedes) and Venus Fly Traps. He's also been wanting to get some Sundew Savages. Given this little collection and his real enjoyment of ...
3
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0answers
160 views

Why does a broad-leaved evergreen (Mahonia aquifolium) has red leaves?

To my knowledge, oregon grape (Mahonia aquifolium) is purportedly an evergreen shrub? Deciduous broadleaf plants lose their leaves in autumn usually and before that as the leaves die they oxidize and ...
3
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0answers
48 views

Names for the degrees for symptoms from drought (or other damage) done to trees

Looking out my window, I see trees suffering from drought. I once knew the name for the degrees visible, but I have forgotten and can't find it on the net. Attempt at describing "level of dryness" ...