Rosette (botany)

In botany, a rosette is a circular arrangement of leaves, with all the leaves at a similar height.

Though rosettes usually sit near the soil, their structure is an example of a modified stem.

Function

Often, rosettes form in perennial plants whose upper foliage dies back with the remaining vegetation protecting the plant. Another form occurs when internodes along a stem are shortened, bringing the leaves closer together, as in lettuce and dandelion and some succulents. (When plants such as lettuce grow too quickly, the stem lengthens instead, a condition known as bolting.) In yet other forms, the rosette persists at the base of the plant (such as the dandelion), and there is a taproot.

Protection

Part of the protective function of a rosette like the dandelion is that it is hard to pull from the ground; the leaves come away easily while the taproot is left intact.

Another kind of protection is provided by the caulescent rosette which is part of the growth form of the giant Espeletia genus in South America, which has a well-developed stem above the ground. In tropical alpine environments a wide variety of plants in different plant families and different parts of the world have evolved this growth form characterized by evergreen rosettes growing above marcescent leaves. Examples where this arrangement has been confirmed to improve survival, help water balance, or protect the plant from cold injury are Espeletia schultzii and Espeletia timotensis, both from the Andes.

Rosette

Rosette is the French diminutive of rose. It may refer to :

Rosette (schizont appearance)

The rosette is a formation characteristic of schizonts in infection by the reptile parasites Plasmodium tropiduri and P. holaspi or by the fish parasite Babesiosoma.

It is also seen in the case of human parasite Plasmodium malariae.

References

Rosette (actress)

Rosette (real name Françoise Quéré; born 6 September 1959) is a French actress and producer.

Roles

Short films by Rosette

Production company

External links