05/08/2020
Hi Plantitos and Plantitas! Say hello to the shyest member of our family, the Makahiya or Mimosa Pudica. I planted it from seed so very happy that this little cutie is healthy and strong. 🙂
Mimosa pudica (from Latin: pudica "shy, bashful or shrinking"; also called sensitive plant, TickleMe Plant, sleepy plant, action plant, Dormilones, touch-me-not, shameplant, or shy plant) is a creeping annual or perennial flowering plant of the pea/legume family Fabaceae and Magnoliopsida taxon, often grown for its curiosity value: the compound leaves fold inward and droop when touched or shaken, defending themselves from harm, and re-open a few minutes later. This reflex may have evolved as a defense mechanism to disincentivize predators, or alternatively to shade the plant in order to reduce water lossage due to evaporation. The species is native to South America and Central America, but is now a pantropical w**d. It can also be found in Asia in countries such as Bangladesh, Thailand, India, Nepal, Indonesia, Malaysia, Philippines, Vietnam, Cambodia, Laos, Japan, Sri Lanka, Guam and well across the southern part of the United States. It is also found as an invasive w**d in Far North Queensland, Australia. It grows mostly in undisturbed 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 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 insect pollinated and wind pollinated.The seeds have hard seed coats which restrict germination and make osmotic pressure and soil acidity less significant hindrances. High temperatures are the main stimuli that cause the seeds to end dormancy.
The roots of Mimosa pudica create carbon disulfide, which prevents certain pathogenic and mycorrhizal fungi from growing within the plant’s rhizosphere. This allows the formation of nodules on the roots of the plant that contain endosymbiotic diazotrophs, which fix atmospheric nitrogen and convert it into a form that is usable by the plant.
Mimosa pudica is a tetraploid.