flora

flora — noun

1. all the plants that grow naturally in a specific place, region, or during a part

1.nounB2
Definition

all the plants that grow naturally in a specific place, region, or during a particular period of time — for example, the plants found in a rainforest, a desert, or a prehistoric era.

Example

The flora of Madagascar includes thousands of plant species found nowhere else on Earth.

collocation: flora of + [place]

Scientists study the ancient flora of the Arctic by examining fossils from the Ice Age.

Common collocations
  • native flora
  • coastal flora
  • desert flora
  • tropical flora
  • ancient flora
  • rich flora
  • flora and fauna
Synonyms
  • vegetation

    broader term for all plant cover; less scientific and less likely to include a historical or regional perspective

  • plant life

    simpler everyday alternative, common in general writing

  • greenery

    informal, emphasizes the visual green aspect of plants; not used for scientific contexts

Antonyms
  • fauna

    the animals of a particular place or time, commonly contrasted with flora

Grammar Patterns

flora of + [place/period]

[adjective] + flora

Usage Note

Flora is typically uncountable and refers to the collective plant life of an area. It is often paired with 'fauna' (the animals of the area) in the set phrase 'flora and fauna'.

Common Mistakes

There are many floras in this forest.
There is a wide variety of flora in this forest.
Flora is uncountable; it names the whole collection of plants, not individual ones.

2. the community of tiny organisms — mainly bacteria — that naturally live inside a

2.nounC1
Definition

the community of tiny organisms — mainly bacteria — that naturally live inside an animal's body, especially in the digestive system, where they help with processes such as breaking down food.

Example

The human gut flora helps break down food and produces vitamins that the body needs.

collocation: gut flora

Doctors say that taking antibiotics can change the natural flora inside your digestive system.

collocation: natural flora

Common collocations
  • gut flora
  • intestinal flora
  • oral flora
  • skin flora
  • healthy flora
  • balanced flora
  • natural flora
Synonyms
  • microbiome

    more modern term that includes the genetic material of all microbes; gaining popularity over 'flora'

  • microflora

    more technical synonym, same meaning but less common

  • bacteria

    only covers one type of organism in the flora; narrower in meaning

Grammar Patterns

[location] + flora

[adjective] + flora

Usage Note

This sense is almost always modified by a location adjective ('gut', 'intestinal', 'oral', 'skin') that specifies where the microorganisms live. Frequently used in medical and scientific writing.

Common Mistakes

The gut flora are responsible for digestion.
The gut flora is responsible for digestion.
Though flora refers to many organisms, it takes a singular verb in standard English.

Word family

Synonym discussion

Sense: noun/1

All three alternatives refer to plants growing in an area, but they differ in register and scope. 'Vegetation' is the broadest term, covering all plant cover from mosses to trees, and works in both scientific and general writing. 'Plant life' is the simplest, most conversational option — you might say 'the island's plant life was damaged by the storm' in casual speech. 'Greenery' emphasizes the visual green quality of plants and is informal, often used in travel or gardening contexts ('lush greenery'). 'Flora' stands apart as the most scientific and formal term, and it is the only one that can refer to plants of a specific historical period or that pairs naturally with 'fauna' in ecological discussions. For a biology report, use 'flora'; for a nature blog, 'greenery' or 'plant life' may feel more natural.

vegetation ↗plant lifegreenery

Common collocations

Nouns

  • fauna (as in 'flora and fauna')

Phrases

  • flora and fauna

Prepositions

Etymology

LatinEnglish

From Latin 'Flora', the name of the Roman goddess of flowers and spring. In classical Latin the word 'flōra' also came to mean 'flower' or 'plants.' Botanists in the 1600s began using 'Flora' as a title for catalogs of a region's plants, and from there it became the general term for a region's plant life. The medical sense (bacteria living in the body) emerged in the early 1900s by analogy with plant flora.