Daisy family🌼
Asteraceae
キク科
One of the largest families of angiosperms. Approximately 24,000 species are known, distributed worldwide. The most distinctive feature is the capitulum (flower head), in which numerous small florets are clustered to resemble a single flower. Includes many familiar plants such as dandelions, sunflowers, chrysanthemums, cosmos, and thistles.
Key Characteristics
- ●Capitulum (flower head): numerous small florets clustered to resemble a single flower
- ●Combination of ray florets (petals extending in one direction) and disc florets (tubular)
- ●Fruit is an achene, often bearing a pappus (feathery bristles)
- ●Leaves mostly alternate, highly variable in shape
Morphological Traits
A family may include species with different trait values — multiple values indicate the range within the family.
Leaf arrangement
Alternate / Opposite / Whorled
Leaf type
Simple / Compound
Venation
Pinnate
Leaf margin
Serrate / Dentate / Entire / Crenate
Growth form
Shrub / Tree / Vine / Herb
Evergreen/Deciduous
Deciduous
Leaf dissection
Dissected / Undivided
Stipules
Present / Absent
Latex
Present / Absent
Aromatic
Aromatic / Foetid / None
Flower symmetry
Actinomorphic / Zygomorphic
Petal count
3 petals
Ovary position
Inferior
Stamen count
1-2
Plant sex
Dioecious / Hermaphrodite / Monoecious
Phylogenetic Position
Angiosperms > Eudicots > Core eudicots > Asterales > Asteraceae
Divergence Era
Late Cretaceous to Paleogene (approx. 80–70 million years ago)
Representative Genera
Related Evolution Events
- ・Evolution of the capitulum (flower head)
- ・Development of wind dispersal of seeds via pappus