Tepal

As perianth or tepal a journal of the perianth is called when the perianth is not divided into calyx and corolla in flowering plants. This uniform ( homoiochlamydeische ) perianth is called the perianth.

Design and function

Tepals fulfill both functions of the perianth, protection in the bud stage and attracting pollinators.

Tepals are in one or two whorls or spirally. A two-circuit perianth is frequently encountered especially in monocots. The perianth calyx may be similar ( haplochlamydeisch ), such as in Juncus, Fagus or Rumex, or is it all kronblattähnlich as in the tulip. In the dual-circuit Perigon the leaves can vary in size and shape in the inner and outer circle, such as the snowdrop or the orchid plants.

Historical

Perigonium was introduced by Ehrhardt in the significance of perianth ( calyx and corolla ). Link 1798 Perigon for the uniform perianth has used. Since then it has this meaning in use. The term tepal was introduced by Augustin Pyramus de Candolle 1827 in analogy to the already common terms Petalum and sepal. It is a portmanteau formed and as anagram of Petalum.

Evidence

• Flower