Floral Formula of Hibiscus

Hibiscus may be a genus of flowering plants within the Malvaceae , Malvaceae. It is an outsized genus covering many species native to tropical and subtropical regions with warm temperate features across the planet .


Floral Formula

A floral formula is the numeric representation of various floral structures that constitute a flower. It is used to describe a flower using some signs and symbols, so as to designate various floral parts.


The Floral Formula of Hibiscus Rosa Sinensis is 


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Systematic Position of Malvaceae

Division: Embryophyta Siphonogama

Sub Division: Angiospermae

Class: Dicotyledoneae

Subclass: Archichlamydeae

Order: Malvales

Family: Malvaceae


Features of Malvaceae Species

Some Common Plants

Common Name 

Scientific Name 

China rose or shoe flower

Hibiscus rosa sinensis

Cotton

Gossypium herbaceum

Lady’s finger

Hibiscus esculentus

Mallow

Malva sylvestris

Hina

Pavonia odorata

Indian tulip

Thespesia populnea


Size And Distribution

The family has nearly 25 genera and nearly 1500 species widely spread in tropical and temperate regions. In India the Malvaceae family is represented by 22 genera and about 125 species.


Description of The Family

Habitat: most members are terrestrial mesophytes.

Root: Typically they possess a faucet rootage with profuse branching

Stem: aerial, branched, erect, herbaceous, cylindrical, and woody with young portions covered by satellite hairs or trichomes. Typically, the stem displays fibrous nature with much mucilaginous sap.

Leaf: leaves are simple, often lobed palmately and are alternate, petiolate, stipulate, cordate or ovate. The margin usually is entire or serrate, venation is unicostate or multicostate, pinnately reticulate. Leaves are generally covered by stellate hair displaying mucilaginous ducts.

Inflorescence: typically cymose, solitary cymes within the leaf axil or raceme.

Flower: Bracteate, bracteolate, actinomorphic, showy, dichlamydeous, complete, pedicellate, heterochlamydeous bisexual, pentamerous and hypogynous, mucilage in floral structures.

Calyx: green, typically 5 sepals, gamosepalous showing valvate aestivation and odd sepal is posterior in position.

Epicalyx: additional calyx like whorl formed by bracteoles on the surface of the calyx. 5-8 bracteoles to the outer calyx, free and green. Number of bracteoles varies in different species.

Corolla: Petals 5, polypetalous bust basally adnate with the staminal column, variously colored, twisted aestivation.

Androecium: Number of stamens, monadelphous,  filaments fuse to form a tubular staminal column around gynoecium, anthers reniform, monothecous, extrorse dehiscing transversely or longitudinally

Gynoecium: ong, and straightforward style, slender passing through the staminal tube. Stigma 5, colored and capitate, pentacarpellary syncarpous, ovary superior, ovary pentalocular with several oculi per locule on the placentation . Style branches into many stigmata or twice the amount , as that of carpels.

Fruit: Abortive mostly. Most members of this family exhibit production of capsules which will be a loculicidal capsule.

Seeds: one or more seeds per locule, exalbuminous with a curved embryo

Pollination: members of this family mainly exhibit entomophilous pollination, where flowers are colored brightly alongside extrafloral nectaries.


Salient Features of The Family

  • Most members of the family exhibit fibrous stem

  • Young stems and leaves are going to be covered by stellate trichomes

  • Members anatomically show the presence of mucilaginous ducts

  • Flowers show polypetalous condition with contorted aestivation

  • Androecium displays numerous stamens, showing monadelphous conditions. Anthers are reniform and are monothecous. The staminal column encloses the gynoecium.

  • The gynoecium is multicarpellary, multilocular, syncarpous, superior ovary with axile placentation

  • The fruit is typically a schizocarp or capsule.

FAQs (Frequently Asked Questions)

1. What is Hibiscus?

Ans - Hibiscus may be a genus of flowering plants within the Malvaceae. It is an outsized genus covering many species native to tropical and subtropical regions with warm temperate features across the planet. 


2. Describe the Systematic Positioning of  Malvaceae

Ans -The systematic positioning of  Malvaceae

  • Division: Embryophyta Siphonogama

  • Sub Division: Angiospermae

  • Class: Dicotyledonaea

  • Subclass: Archichlamydeae

  • Order: Malvales

  • Family: Malvaceae.