|Copyright: Luciano Gollini (lousat)
|Date Taken: 2014-12-07|
|Camera: Sony Cybershot DSC HX200V|
|Exposure: f/6.3, 1/500 seconds|
|More Photo Info: [view]|
|Photo Version: Original Version|
|Date Submitted: 2015-03-02 11:57|
|[Note Guidelines] Photographer's Note|
Species: M. pudica
Mimosa pudica (from Latin: pudica "shy, bashful or shrinking"; also called sensitive plant, sleepy plant and the touch-me-not), is a creeping annual or perennial herb often grown for its curiosity value: the compound leaves fold inward and droop when touched or shaken, to protect them from predators, re-opening minutes later. The species is native to South America and Central America, but is now a pantropical weed. It grows mostly in shady areas, under trees or shrubs.
The stem is erect in young plants, but becomes creeping or trailing with age. It can hang very low and become floppy. The stem is slender, branching, and sparsely to densely prickly, growing to a length of 1.5 m (5 ft). The leaves of the mimosa pudica are compound leaves.
The leaves are bipinnately compound, with one or two pinnae pairs, and 10–26 leaflets per pinna. The petioles are also prickly. Pedunculate (stalked) pale pink or purple flower heads arise from the leaf axils in mid summer with more and more flowers as the plant gets older. The globose to ovoid heads are 8–10 mm in diameter (excluding the stamens). On close examination, it is seen that the floret petals are red in their upper part and the filaments are pink to lavender. The fruit consists of clusters of 2–8 pods from 1–2 cm long each, these being prickly on the margins. The pods break into 2–5 segments and contain pale brown seeds some 2.5 mm long. The flowers are pollinated by the wind and insects. The seeds have hard seed coats which restrict germination.
Mimosa pudica is well known for its rapid plant movement. Like a number of other plant species, it undergoes changes in leaf orientation termed "sleep" or nyctinastic movement. The foliage closes during darkness and reopens in light.This was first studied by the French scientist Jean-Jacques d'Ortous de Mairan.
The leaves also close under various other stimuli, such as touching, warming, blowing, or shaking. These types of movements have been termed seismonastic movements. The movement occurs when specific regions of cells lose turgor pressure, which is the force that is applied onto the cell wall by water within the cell vacuoles and other cell contents. When the plant is disturbed, specific regions on the stems are stimulated to release chemicals including potassium ions which force water out of the cell vacuoles and the water diffuses out of the cells, producing a loss of cell pressure and cell collapse; this differential turgidity between different regions of cells results in the closing of the leaflets and the collapse of the leaf petiole. This characteristic is quite common within the Mimosoideae subfamily of the legume family, Fabaceae. The stimulus can also be transmitted to neighboring leaves. It is not known exactly why Mimosa pudica evolved this trait, but many scientists think that the plant uses its ability to shrink as a defense from herbivores. Animals may be afraid of a fast moving plant and would rather eat a less active one. Another possible explanation is that the sudden movement dislodges harmful insects.
La Mimosa pudica è una pianta perenne appartenente alla famiglia delle Leguminosae ed è originaria dell'America del Sud (Brasile).
La pianta si presenta come un arbusto sempreverde con fusti scuri ricoperti da una sottile peluria e minuscole spine. Le foglie sono verdi con una forma ovale allungata e proprio nelle foglie troviamo la particolarità di questa pianta classificata come "sensitiva".
Durante le ore notturne o se sfiorate, le foglie della Mimosa pudica si chiudono su se stesse e i suoi rami si afflosciano; da qui il nome "pudica" dal latino "pudìcus" ovvero "vergogna".
Verso la fine della primavera, la pianta produce fioriture spettacolari con bellissimi fiori di color rosa e dalla forma di piccoli pompon.
I fiori della Mimosa pudica (autoimpollinanti), nelle settimane successive alla fioritura, lasciano il posto ai frutti, costituiti da bacche verdi e rotonde riunite in grappoli spinosi la cui lunghezza può raggiungere anche i 2 centimetri. All'interno delle bacche maturano poi i semi per mezzo dei quali è possibile propagare la pianta.
Nonostante in coltivazione la pianta non supera i 40-50 cm di altezza, nelle zone con clima tropicale, può raggiungere anche i 4 metri di altezza e divenendo molto infestanti.
periko, Ishi, marius-secan, Pitoncle, Hotelcalifornia, imageme, Hormon_Manyer, CeltickRanger, anel, Matyas has marked this note useful
Only registered TrekNature members may rate photo notes.
|To imageme: ....||lousat
|You must be logged in to start a discussion.|
super good sharpness and beautiful colours
i like this plant
thanks gr lou
- [2015-03-02 19:24]
What a gorgeous flowering plant, hard to believe it is considered a weed. We have a plant here in Ohio called Jewelweed or (touch-me-not), but it doesn't look anything like this species. Perfectly framed and displaying excellent detail and vivid yet natural colors. Very nice DOF. Great notes!!
- [2015-03-02 20:53]
EYE catching composition, beautiful shot.
- [2015-03-03 10:07]
In Mexico this plant is known as "dormilona" (sleepy).
Beautiful composition with good sharpness, nice colors and blurred background.
- [2015-03-03 12:14]
Truly lovely flower. I've seen the plant in hot-houses of botanical gardens, but never the flower.
Once again you post a wonderful image with a lovely and interesting specie of plant. Amazing sharpness and excellent clarity. Outstanding colors. The light and details are great.
Thanks for sharing!
prova prova prova
Belle publication bien composée, finement détaillée et délicatement colorée dans une belle lumière.
A bientôt sur TN pour de nouvelles aventures.
Very common species in our area. In our childhood days we used to touch its leaves to see how its gets sleep.
In our language (Bengali Language), We call it Lojja-boti.
Lojja means Shy. Even we use the term Lojja-boti if anybody get shy (mainly use to feminine gender).
Nice presentation with natural and true color of the plant as well as its flower.
Thanks for sharing with informative NOTE.
- [2015-03-06 9:23]
Tropical plant-flower ..
Excellent focus, very good sharpness and light.
Hi Luciano, Super excellent sharpness along with great light and tones. Best regards
P.S. I had been blocked to go on TN for several months. I was surprised that I could go on it today
Even without looking at the photographer's name I knew who was behind the lens... Your style, both composition-wise and in flash handling, is original and immediately recognizable. This superb photo isn't an exception: beautiful compo with a sharp, well exposured flower and a vertically "standing" branch - they together form a nice semi-diagonal subject, which is truly pleasant to look at. Top class sharpness as well, with optimal exposure, which didn't wash the colors out. Excellent! THe only, minor issue which I find is the little background noise. Otherwise - hats off of you! Bravo!
Best regards, László
Beautiful photo of this flower/plant with 2 different
color tones and doing great contrast, TFS
- [2015-03-23 3:23]
Une belle photo de cette plante intéressante que je peux aussi voir dans notre Jardin botanique. On la touchait souvent quand mon fils était petit pour voir la réaction du "mimosa pudique".
Bon cadrage, belle netteté.
- [2015-04-05 1:35]
Ciao Luciano! Perfect take. Ideal quality. Splendid effect. Superb light and colours, superb contrast and sharpness. Happy Easter!