Question

Write down the scientific name of China rose plant. Give its floral formula.

Answer 1

Hint: These are plants that have rare beauty and bloom over an extended period of time.

Complete Answer:
- The scientific name of china rose is hibiscus rosa sinensis. The hibiscus was named in 1753 by Carl hinnaeus in his species plant arum. The latin term rosa-sinensis literally means rose of china, though it is not closely related to the true roses.
- Hibiscus are large flat, Conspicuous, trumpet-shaped flowers. Hibiscus flowers have five petals, ranging from white to pink, red, purple or yellow. The hibiscus petals range in size from 4-15 cm.

- Floral formula is the numeric representation of different floral structures that constitute flowers in order to designate various floral parts. Tropical hibiscus are sun and heat loving, usually medium to large tropical shrubs with excellent flowers.
- Some salt tolerance makes them popular choices for warm inland as well as coastal climates.
- Malvaceae, the hibiscus or mallow family (order malvales) contain some $243$ genera and at least $4225$ species of herbs, shrubs and trees. The flowers are large, conspicuous, trumpet-shaped with five petals and their colors can be white to pink, red, orange, peach and yellow or purple that are all $4-18cm$ broad.

- The floral formula of hibiscus rosa sinensis is as follows.
$$Br.Brl.\oplus$$

$$K(s)C(s)A(\mathrm{\infty })\underset{―}{G}(s)$$
Number of parts.
1. $K(s)=$Calyx of $5$ sepals.
2. $C(s)=$Corolla of $6$ petals.
3. $A(\mathrm{\infty })=$Androecium of $\mathrm{\infty }$ stamens.
4. $G(s)=$Gynoecium of $5$ carpels.
5. $Br=$Bracteole condition.
6. $Brl=$Bracteolate
7.

$=$unisexual, pistil late (female) flowers.

Note: Hibiscus is the national flower of Malaysia. It is the native flower of Hawaii.