Question

Parallel venation is found in
(a) Mentha
(b) Banana
(c) Dalbergia
(d) Syzygium

Answer 1

Hint: The way in which veins are found to be arranged on the leaf is known as venation. When the veins of the leaf blade or lamina exhibits a parallel pattern from the base to the tip of the leaf, such a condition is known as the parallel venation.

Complete answer:
Parallel venation is found in the Banana plant. Other plants showing parallel venation include grains, banana, canna, grass, musa, maize, etc.
From the presence of mid- veins, parallel venation can be differentiated into two types:
1. Pinnate parallel venation – In this, the veins arise from the midvein (midrib) present in the center of the leaf lamina from base to the apex. These veins grow perpendicular to the midvein towards the margin of the leaf and are parallel to one another. This venation is also called Unicostate parallel venation.
2. Palmate parallel venation – In this case, there are many prominent veins that are parallel to one another. This venation is also known as Multicostate parallel venation. It is also of two types, Convergent and Divergent parallel venation.

So, the correct answer is, ‘Banana.’

Additional Information:
- In the case of reticulate venation, the veins are present in an irregular manner forming a network. Examples of plants, which exhibit reticulate venation, include rose, tulsi, hibiscus, papaya, ficus.
- The Leaves of monocot plants show parallel venation and the leaves of dicot plants show reticulate venation.
- Veins are the part of the vascular tissue, arising from the stem to the leaf of the plant. Veins are made up of xylem and phloem, and enclosed in the parenchyma, sclerenchyma and bounded by the sheath cells.
- Venation also provides mechanical support, protection, coordination in the development of the plants.

Note:The venation architecture is enormously distributed among the diverse species of plants. Based on venation a plant can be differentiated into different groups it has its importance in the recognition and in differentiating the plants in their characteristics. Variation in leaf venation is mostly exhibited by the angiosperms.