What is an actinomorphic flower? (2024)

FAQs

What is an actinomorphic flower? ›

A actinomorphic flower is a type of flower that possesses radial symmetry. An actinomorphic flower can be divided into three or more identical parts, each of which are identical to each other when based on the rotating point of the center of the flower.

Zygomorphic flower - A flower capable of being divided into only two equal parts (mirror images) by a line passing through the middle of a flower, i.e., other lines passing the middle of the flower will not give mirror images of one another; same as monosymmetric, bilaterally symmetrical, and irregular flowers and ...

Actinomorphic flowers exhibit radial symmetry. They are regular flowers and their floral parts are equal in shape and size. Zygomorphic flowers exhibit bilateral symmetry. The floral parts of these flowers are unequal in size and hence these flowers are popularly known as irregular flowers.

Called by botanists “actinomorphic,” these flowers — such as roses, daisies or tulips — can be bisected into two same halves on more than one plane. While zygomorphic flowers influence pollinator behavior and can discourage less-effective pollinators from visiting them, actinomorphic flowers are not so selective.

Examples of actinomorphic flowers are rose, tulip, mustard, datura, and tomato. On the other hand, the floral whorls in Gulmohar are arranged in such a way that it can be divided into two halves only through a single plane. Gulmohar belongs to the Fabaceae (Leguminosae) family of the order Fabales.

Epigynous: In the epigynous flowers, ovary is present inferior to calyx, corolla and androecium. The thalamus in this encloses the ovary inside it & the other three whorls are located above this, e.g., daffodil, cucumber, etc.

If gynoecium is situated in the centre and other parts of the flower are located on the rim of the thalamus almost at the same level, it is called perigynous. The ovary here is said to be half inferior, eg., plum, rose, peach.

So, Hibiscus is an actinomorphic flower. Thus, the right answer is option C. i.e., Hibiscus. Note: Zygomorphic flowers also can be divided into two equal halves but through the division in one plane.

In Petunia, the flowers are actinomorphic and can be cut into two similar halves in any vertical plane passing through the centre (radial symmetry).

The inflorescence of sunflower (Helianthus annuus L.) is heterogamous with zygomorphic ray flowers located in the outermost whorl of the head and actinomorphic disk flowers arrayed in arcs radiating from the center of the head.

What flower causes hallucinations? ›

Sacred datura is a poisonous plant and consuming any part of the roots, leaves, stems, seeds, or flowers can cause illness. Used very rarely by Natives, the plant causes hallucinations and allowed partakers to have past or future visions, visit dead relatives, and see through objects to find lost items.

Also known as Jimson Weed, moonflower, devil's weed, or thornapple, Datura is a poisonous plant that is unfortunately often abused for recreational use because it produces hallucinations and intoxication that can last for days. Users may ingest the Datura, smoke it, or use it as a lotion on the skin.

Jimsonweed (Datura stramonium)

It is a weedy annual plant with striking white tubular flowers and spiky seed pods. The leaves and seeds contain potent alkaloids (hyoscamine and hyoscine) that cause hallucinations.

However, there is group of species in the Pea Family (a subfamily) with flowers like the pride-of-Barbados or peaco*ck flower (Caesalpinia pulcherrima) shown to the left. Flowers in this subfamily are somewhat variable, but are generally zygomorphic or at least asymmetric.

Complete answer:

Cassia is an example of a zygomorphic flower with imbricate aestivation. Cassia is a flowering plant that is native to India and its adjacent countries.

The tulip's flowers are usually large and are actinomorphic (radially symmetric) and hermaphrodite (contain both male (androecium) and female (gynoecium) characteristics), generally erect, or more rarely pendulous, and are arranged more usually as a single terminal flower, or when pluriflor as two to three (e.g. Tulipa ...

Orchids, for example, have zygomorphic flowers.