




Centaurea nigra
Black knapweed is a pretty flower that has purple petals and grows in fields and meadows. It attracts butterflies and bees, making it a favorite among pollinators!
Habitat: Grasslands
The black knapweed has striking purple or magenta thistle-like flowers, each head sitting atop a sturdy stem. Its unique feature is the dark, often fringed or scaly bracts that form a distinct blackish base directly beneath the flower.





Category
PlantsRarity
Common
Danger
1/5 · Very low
Snaps
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Its dark flower base inspired the name 'black knapweed'!
Knapweed was once used to treat sore throats and fevers!
Some caterpillars use knapweed as their only food source!
Some say its tough stems were used to make brooms!
Black knapweed can grow deep taproots that help it survive dry spells and poor soils.
Black knapweed has many seeds per flower head, allowing it to spread widely and colonize new areas.
Black knapweed produces abundant nectar, attracting many insects to help it pollinate its flowers.
Apis mellifera
Visits flowers for nectar and pollen.
Vanessa cardui
Feeds on nectar, aiding flower reproduction.
Puccinia calcitrapae
Fungus forms orange spots on leaves and stems.
Bos taurus
Grazes on young leaves, less so on mature plants.
Flowering plants are any plants that produce flowers as part of their reproductive cycle.
Biennial plants complete their life cycle over two growing seasons, typically forming foliage in the first year and flowering/seeding in the second.
Summer blooming plants produce their flowers during the summer season, often providing vibrant color when many other plants have finished.
Fragrant flowers emit a pleasant aroma, often to attract pollinators or for defense.
Colorful describes organisms or objects displaying a wide range of bright and distinct colors.
Grassland habitats are terrestrial biomes dominated by grasses and herbaceous plants, supporting a variety of grazing animals.
Describes plants that are particularly attractive and beneficial to a wide range of pollinating organisms.
Invasive species are non-native organisms that cause harm to the environment, economy, or human health.
Describes organisms that transfer pollen, enabling the fertilization and reproduction of plants.
No aliases listed yet.
Danger
1/5 · Very low
Do not touch plants without asking an adult, as some may not be safe.
30-90 cm
30-60 cm
2-4 cm
Summer to early autumn (July-October)
Yes
None
Perennial
Insect
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