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A flower, also known as a bloom or blossom, [1] is the reproductive structure found in flowering plants (plants of the division Angiospermae).Flowers consist of a combination of vegetative organs – sepals that enclose and protect the developing flower.
The perianth is the flower structure comprising the two sterile whorls, the calyx and the corolla. In many cases, as for example in weeping willow ( Salix babylonica , salicaceae ) or European ash ( Fraxinus excelsior , oleaceae ) the perianth may be missing, that is, the flowers have only the fertile whorls (androecium and gynoecium) and are ...
A floral diagram is a graphic representation of the structure of a flower. It shows the number of floral organs, their arrangement and fusion. Different parts of the flower are represented by their respective symbols. Floral diagrams are useful for flower identification or can help in understanding angiosperm evolution.
The outer series (calyx of sepals) is usually green and leaf-like, and functions to protect the rest of the flower, especially the bud. [58] [59] The inner series (corolla of petals) is, in general, white or brightly colored, is more delicate in structure, and attracts pollinators by colour, scent, and nectar. [60] [61]
The timing of flowering, the duration of flowering and the mode by which they cease to function once their role is fulfilled are all areas of research within the field of floral biology. [ 2 ] Studies in floral biology can have applications since pollination and fruit set are key factors that affect yield in all crop plants.
Therefore, when Function D is lost the structure of the ovules becomes similar to that of leaves and when Function E is lost sensu stricto, the floral organs of the three outer most verticils are transformed into sepals, [13] while on losing Function E sensu lato, all the verticils are similar to leaves. [14]
The flower is the characteristic structure concerned with sexual reproduction in flowering plants (angiosperms). Flowers vary enormously in their structure (morphology). A perfect flower, like that of Ranunculus glaberrimus shown in the figure, has a calyx of outer sepals and a corolla of inner petals and both male and female sex organs.
Chloroplasts in leaf cells of the moss Mnium stellare. Plant anatomy or phytotomy is the general term for the study of the internal structure of plants.Originally, it included plant morphology, the description of the physical form and external structure of plants, but since the mid-20th century, plant anatomy has been considered a separate field referring only to internal plant structure.