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Elm family
Ulmaceae
ニレ科
A family including Zelkova, elms, and hackberries. Mostly deciduous tall trees widely distributed in temperate regions of the Northern Hemisphere. Characterized by asymmetric leaf bases. Wind-pollinated, with many species producing winged fruits.
Key Characteristics
- ●Asymmetric leaf bases
- ●Simple, alternate leaves with serrate margins
- ●Wind-pollinated (flowers small and inconspicuous)
- ●Fruit is a samara or drupe
Morphological Traits
A family may include species with different trait values — multiple values indicate the range within the family.
Leaf arrangement
Alternate
Leaf type
Simple
Venation
Pinnate / Palmate
Leaf margin
Dentate / Entire
Growth form
Shrub / Tree
Evergreen/Deciduous
Evergreen / Deciduous
Leaf dissection
Undivided
Stipules
Present
Flower symmetry
Actinomorphic
Petal count
3 petals
Petal fusion
Free
Ovary position
Superior
Stamen count
1-2
Plant sex
Hermaphrodite / Monoecious
Phylogenetic Position
Angiosperms > Eudicots > Rosales > Ulmaceae
Divergence Era
Late Cretaceous to Paleogene