In sundew when an insect comes in contact with leaf, the hairs move towards the insect.name the movement
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Drosera, which is commonly known as the sundews, is one of the largest genera of carnivorous plants, with at least 194 species.[1] These members of the family Droseraceae lure, capture, and digest insects using stalked mucilaginous glands covering their leaf surfaces. The insects are used to supplement the poor mineral nutrition of the soil in which the plants grow. Various species, which vary greatly in size and form, are native to every continent except Antarctica.[2]
Drosera
Drosera spatulata KansaiHabit.jpg
Drosera tokaiensis
Scientific classificatione
Kingdom:
Plantae
Clade:
Tracheophytes
Clade:
Angiosperms
Clade:
Eudicots
Order:
Caryophyllales
Family:
Droseraceae
Genus:
Drosera
L.
Subgenera
Acturia
Bryastrum
Coelophylla
Drosera
Ergaleium
Lasiocephala
Meristocaulis
Phycopsis
Regiae
Stelogyne
Thelocalyx
Synonyms
Adenopa Raf.
Dismophyla Raf.
Drossera Gled.
Esera Neck.
Filicirna Raf.
Freatulina Chrtek & Slavíková
Rorella Hill
Rossolis Adans.
Charles Darwin performed much of the early research into Drosera, engaging in a long series of experiments with Drosera rotundifolia which were the first to confirm carnivory in plants.[3] In an 1860 letter, Darwin wrote, “…at the present moment, I care more about Drosera than the origin of all the species in the world.”[4]
Both the botanical name (from the Greek δρόσος: drosos = "dew, dewdrops") and the English common name (sundew, derived from Latin ros solis, meaning "dew of the sun") refer to the glistening drops of mucilage at the tip of the glandular trichomes that resemble drops of morning dew. The Principia Botanica, published in 1787, states “Sun-dew (Drosera) derives its name from small drops of a liquor-like dew, hanging on its fringed leaves, and continuing in the hottest part of the day, exposed to the sun.”[5]