Biology · Morphology of Flowering Plants · NEET
Venation is the arrangement of veins and veinlets in the lamina (blade) of a leaf. NCERT (Ch 5, Morphology of Flowering Plants) defines two main types based on this arrangement: reticulate and parallel. This is a very common one-mark identification point for NEET.
Reticulate venation, where the veinlets form a net-like network, is found generally in dicotyledonous (dicot) plants. Example leaves: mango, peepal, china rose, tulsi. Remember: reticulate = network = dicot.
Parallel venation, where the veins run parallel to each other within the lamina, is the characteristic of most monocotyledons (monocots). Examples: grass, wheat, maize, banana, canna. Remember: parallel = monocot.
Yes, this is exactly where NTA sets traps. NCERT says dicots 'generally' possess reticulate venation and parallel is the characteristic of 'most' monocotyledons. There are exceptions (for example, Calophyllum and Smilax are dicots with parallel-like venation, and Alocasia/Colocasia are monocots with reticulate venation). For NEET, learn the general rule but know it is a tendency, not an absolute law.
Venation reflects the internal anatomy. In a dicot leaf the veins vary in thickness (reticulate), so the vascular bundles are of different sizes. In a monocot leaf the parallel venation is reflected in the near similar sizes of the vascular bundles, except in the main veins. NEET can connect this morphology point to leaf anatomy questions.
Try the real previous-year questions from this chapter — each with the answer and a full solution.
In reticulate venation the veinlets form a network (mostly dicots); in parallel venation the veins run parallel to each other in the lamina (mostly monocots).
Reticulate (dicot): mango, peepal, china rose. Parallel (monocot): grass, banana, maize.
Banana is a monocot, so its leaf shows parallel venation.
Reticulate venation, because most dicotyledonous plants (like Solanaceae, Fabaceae members) generally possess a net-like vein arrangement.
Yes. NCERT uses the word 'generally', so exceptions exist. For example, Calophyllum and Smilax are dicots that show parallel-like venation. Know it as a general rule.
