Plants are classified based on their stem structure, height, and lifespan into three main types: Herbs, Shrubs, and Trees. Understanding the differences between them is fundamental to Plant Biology.
The word 'Herb' in cooking refers to the leaves of certain aromatic plants (like mint or basil) used for flavoring food. In botany, however, an herb is any non-woody plant regardless of its smell.
Definition: Herbs are plants with a soft, green, non-woody stem. They are usually small in size and have a short lifespan (annual or biennial).
Key Features:
Examples: Wheat, Grass, Mint (Pudina), Coriander (Dhania), Tomato, Spinach, Basil (Tulsi, though sometimes categorized as a shrub)
Definition: Shrubs have a hard, woody stem but are shorter than trees. They typically have many branches starting from the base of the plant.
Key Features:
Examples: Rose, Cotton (Kapas), Hibiscus (China Rose), Bougainvillea, Henna (Mehndi), Lemon plant
Trees have a single, thick, hard woody trunk with branches growing high above the ground. They are tall (above 5 metres) and live for many years. Examples: Mango, Banyan, Neem, Peepal.
A tomato plant is a **herb** in the botanical classification because it has a soft, green (non-woody), relatively fragile stem. Even though it grows to a moderate height, it is still classified as an herb.
Natural Things and Man-Made Things
Learn the difference between natural things (created by nature like trees and sun) and man-made things (created by humans like cars and books).
Nereis — Structure, Classification, and Characteristics
Nereis (Neanthes): phylum Annelida, class Polychaeta. Learn its classification, body structure, parapodia, setae, and importance in biology Class 11.
Net Primary Productivity (NPP) — Definition, Formula, Examples
Net Primary Productivity (NPP): the organic matter available to consumers after plant respiration. NPP = GPP − Respiration. Class 12 CBSE ecology notes.
Nightfall (Nocturnal Emission) — Biology, Causes and Facts
Nightfall (nocturnal emission) is the involuntary ejaculation of semen during sleep. It is a normal biological process caused by testosterone and REM sleep.
Nutrition in Amoeba — How Amoeba Feeds (Holozoic Nutrition)
Nutrition in Amoeba: holozoic nutrition through ingestion, digestion, absorption, assimilation, and egestion. Pseudopodia and food vacuole explained. Class 7–10 Biology.
Turn this guide into revision flashcards, a practice exam, or an AI-generated podcast — free, no signup required.