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Arrow-grass family
Juncaginaceae Rich.
シバナ科
A monocot family growing in wetlands, salt marshes, and waterside habitats. Approximately 3 to 4 genera and 25 species are known, distributed from temperate to polar regions of the Northern Hemisphere. In Japan, several species of Triglochin (arrowgrass) grow in salt marshes and tidal flats.
Key Characteristics
- ●Leaves narrow-linear, tufted from the base
- ●Flowers small, trimerous, in spicate inflorescences
- ●Fruit a dehiscent schizocarp
- ●Includes halophytes adapted to salt marshes
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
Parallel
Leaf margin
Entire
Growth form
Herb
Evergreen/Deciduous
Deciduous
Leaf dissection
Undivided
Stipules
Present / Absent
Latex
Present / Absent
Flower symmetry
Actinomorphic
Petal count
3 petals / 4 petals / 6 petals
Ovary position
Superior
Plant sex
Dioecious / Monoecious
Phylogenetic Position
Angiosperms > Monocots > Alismatales > Juncaginaceae
Divergence Era
Late Cretaceous (ca. 80 million years ago)
Representative Genera
Related Evolution Events
- ・Specialized adaptation to salt marshes and tidal flat environments
- ・Establishment of anemophilous (wind) pollination
Plants in Arrow-grass family on this site
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