Anise Pimpinella anisum
Anise begins as a delicate flowering herb. Pimpinella anisum belongs to the carrot family and produces clusters of small flowers that eventually develop into aromatic fruits commonly called “anise seeds.” Inside these tiny botanical structures is the chemistry behind anise's unmistakably sweet, licorice-like aroma.
What Is
Anise?
Anise is the aromatic fruit of the flowering herb Pimpinella anisum.
The Herb Behind “Anise Seed”
Pimpinella anisum is an annual herb belonging to Apiaceae, the carrot family. It develops leafy stems followed by clusters of small flowers arranged in the characteristic umbrella-like structures associated with many members of this family.
Following pollination and fertilization, the flowers develop into small dry fruits. These aromatic fruits are harvested and dried for culinary and infusion use.
Although they are almost universally called “anise seeds,” the whole spice is botanically a fruit containing seed tissue within it.
Anise “Seed” Is Technically a Fruit
The familiar spice sold as anise seed is the dried fruit of Pimpinella anisum. Culinary terminology and botanical terminology do not always describe plant structures in exactly the same way.
Where Anise Fits in the Plant Kingdom
Anise belongs to Apiaceae, a family famous for aromatic herbs, spices, vegetables, and the distinctive flower clusters known as umbels.
Anise Has Some Familiar Botanical Relatives
Apiaceae contains many recognizable culinary plants. Although their flavors and harvested structures differ, they share important botanical relationships.
Fennel
Fennel belongs to the same family and produces aromatic fruits that are also commonly described as seeds.
Coriander
Coriander is another Apiaceae member whose dried fruits are widely used as a culinary spice.
Carrot
The familiar carrot belongs to the same botanical family, although its famous culinary structure is the enlarged root.
A Delicate Herb With a Complete Life Cycle
The tiny aromatic fruits used in tea and cooking are produced only after the plant develops roots, stems, leaves, flowers, and reproductive structures.
Roots
The root system anchors the plant and absorbs water and mineral nutrients from the soil.
Stems
Above-ground stems support leaves and reproductive growth while transporting water and organic compounds.
Leaves
Green leaves perform photosynthesis and help provide the energy-rich compounds needed for plant growth and reproduction.
Photosynthesis
Chlorophyll-containing tissues capture light energy and use it to support the production of organic compounds.
Flowers
Small flowers form in clusters and contain the reproductive structures needed for fruit and seed development.
Fruits
Following successful reproduction, flowers develop into the small aromatic fruits harvested as the spice.
The Umbel
Flower
Anise produces clusters of small flowers arranged in the umbrella-like pattern characteristic of Apiaceae.
Before the Spice Comes the Flower
Anise flowers are relatively small individually, but they occur together in clusters. This arrangement helps create the distinctive flowering appearance associated with many members of the carrot family.
These flower clusters are known as umbels. The individual flower stalks radiate outward from a shared point, creating an umbrella-like arrangement.
After successful pollination and fertilization, the flowers begin the transition toward fruit development.
Umbel Means “Little Umbrella”
The characteristic flower arrangement of many Apiaceae plants resembles the ribs of an umbrella radiating outward from a central point.
Why Anise “Seeds” Aren't Simply Seeds
The spice we recognize as anise is produced only after flowering has finished and fruit development begins.
Flower Becomes Fruit
Following fertilization, floral tissues participate in the development of the small dry fruit.
Aromatic Structure
The fruit contains volatile compounds responsible for the familiar sweet and intensely aromatic character of anise.
Commonly Called a Seed
In culinary language the dried fruit is routinely called anise seed, even though botanical terminology distinguishes the fruit from the seed contained within it.
Meet Anethole
Anise's unmistakable aroma is strongly associated with trans-anethole, an important constituent of its volatile oil and a major contributor to its characteristic sweet, licorice-like sensory profile.
Trans-Anethole
Anethole contributes strongly to the sweet aromatic character associated with anise and several other botanicals.
Signature CompoundVolatile Oil
The aromatic fraction of anise contains compounds capable of entering the air and interacting with our sense of smell.
Aroma ChemistryAromatic Complexity
Anise contains more than one volatile compound, so its complete aroma cannot be attributed to anethole alone.
Plant ChemistryFruit Structure
Alongside aromatic compounds, the dried fruit contains carbohydrates, lipids, proteins, minerals, and structural plant materials.
Botanical StructureAnise vs. Star Anise
Their names and aromas invite confusion, but anise and star anise come from very different plants.
Pimpinella anisum
True anise is a relatively small annual herb belonging to Apiaceae, the carrot family.
The familiar spice consists of its aromatic dried fruits, commonly called anise seeds.
Illicium verum
Star anise comes from a completely different woody plant, Illicium verum.
Its familiar spice is the distinctive star-shaped fruit rather than the small fruit of an Apiaceae herb.
Similar Aroma Does Not Mean Same Plant
Anise and star anise can both express strong anethole-associated aromas, but they are botanically distinct plants belonging to different families.
Anise vs. Fennel
Anise and fennel are more closely related to each other than either is to star anise, but they are still separate plants.
Pimpinella anisum
Anise is an annual herb in Apiaceae whose small aromatic fruits are used as a spice and infusion ingredient.
Its aroma is characteristically sweet, warm, and strongly associated with anethole.
Foeniculum vulgare
Fennel is another member of Apiaceae but belongs to a different genus and species.
Its fruits can share sweet anise-like notes while maintaining their own distinctive sensory character.
Why Crushing Anise Changes the Aroma
Breaking the dried fruits increases exposed surface area and allows aromatic compounds to escape more rapidly into the surrounding air and brewing water.
Whole Anise
Intact fruits expose less internal plant tissue to air and water, helping slow the release of aromatic compounds.
Crushed Anise
Crushing damages the fruit structure and exposes additional aromatic material.
More Surface Area
Greater exposed surface area generally allows aroma release and water extraction to occur more rapidly.
From Fruit
to Infusion
Hot water extracts soluble compounds while heat helps release anise's distinctive volatile aroma.
What Happens When Anise Meets Water?
When dried anise fruits are steeped, water begins penetrating the plant material and dissolving compounds that can move into the infusion.
At the same time, volatile aromatic compounds escape into the air above the cup. This headspace aroma is an important part of how anise flavor is perceived.
Crushed anise generally presents more exposed surface area than whole fruits, which can accelerate extraction and aroma release.
Brewing Is More Than Taste
What we experience as flavor combines compounds detected in the mouth with volatile molecules perceived through the sense of smell.
From Seed to Aromatic Fruit
Because anise is an annual plant, its vegetative growth, flowering, fruiting, and seed production occur within a single growing cycle.
01 • Germination
A seed begins growing and produces the young root and shoot systems of a new anise plant.
02 • Vegetative Growth
Stems and leaves expand as the plant establishes its photosynthetic capacity.
03 • Energy Capture
Leaves use photosynthesis to produce organic compounds needed for continued development.
04 • Flowering
Umbel-shaped flower clusters develop as the plant enters its reproductive stage.
05 • Fruit Development
Following successful pollination and fertilization, the flowers develop into small dry fruits.
06 • Harvest
Mature aromatic fruits are collected and dried for culinary and infusion use.
Nine Things Worth Remembering
Pimpinella anisum
True anise is botanically known as Pimpinella anisum.
Carrot Family
Anise belongs to Apiaceae, placing it in the same botanical family as fennel, coriander, dill, parsley, and carrots.
It's an Herb
Anise grows as an annual herb rather than as a woody tree or shrub.
“Seeds” Are Fruits
The familiar spice commonly called anise seed is botanically the plant's dried fruit.
Umbel Flowers
The small flowers are arranged in characteristic umbrella-like clusters.
Anethole Matters
Trans-anethole is an important contributor to anise's familiar sweet, licorice-like aroma.
Not Star Anise
Anise and star anise come from completely different botanical species despite their similar names and aromas.
Related to Fennel
Anise and fennel are separate species, but both belong to the Apiaceae family.
Crushing Releases Aroma
Breaking the dried fruit increases exposed surface area and allows aromatic compounds to escape more rapidly.
Questions About the Anise Plant
What is the botanical name for anise?
True anise is botanically known as Pimpinella anisum.
What plant family does anise belong to?
Anise belongs to Apiaceae, commonly known as the carrot or parsley family.
Are anise seeds really seeds?
The culinary ingredient commonly called anise seed is technically the plant's dried fruit.
Is anise the same as star anise?
No. Anise is Pimpinella anisum, while star anise is Illicium verum. They are botanically distinct plants.
Is anise the same as fennel?
No. Anise and fennel belong to the same plant family but are different genera and species.
Why does anise taste like licorice?
Its characteristic sweet, licorice-like aroma is strongly associated with the aromatic compound trans-anethole.
What is an umbel?
An umbel is a flower cluster in which multiple flower stalks radiate from a shared point, producing an umbrella-like arrangement.
Does anise grow on a tree?
No. Pimpinella anisum is an annual herbaceous plant.
What part of anise is used?
The dried aromatic fruits, commonly referred to as anise seeds, are the part most familiar as a spice and infusion ingredient.
Why crush anise before brewing?
Crushing increases exposed surface area and can accelerate the release and extraction of aromatic compounds.
Does anise contain volatile oil?
Yes. Its aromatic fruit contains volatile constituents, with trans-anethole being particularly important to its characteristic aroma.
What happens when anise is brewed?
Water extracts soluble constituents while volatile aromatic molecules are released into the air above the infusion.
From Umbel Flower
to Aromatic Fruit.
Anise is more than the tiny “seed” found in a spice jar. Pimpinella anisum is an annual member of the carrot family that grows from seed, develops leaves and stems, produces delicate umbels of flowers, and ultimately forms the aromatic fruits harvested for culinary and infusion use. Inside those small fruits is a complex mixture of plant compounds, including the anethole strongly associated with anise's unmistakable aroma. From flower anatomy to fruit development and from volatile chemistry to extraction, anise is a small ingredient with a remarkable botanical story.
