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Yellow-eyed grass family
Xyridaceae
トウエンソウ科
A family of herbs growing in wetlands, peat bogs, and nutrient-poor habitats. In Japan, Xyris japonica occurs in wetlands from Kanto to Kyushu. Narrow basal leaves form rosettes, and yellow flowers are borne in spike inflorescences.
Key Characteristics
- ●Narrow elongate leaves form basal rosettes
- ●Flowers are trimerous, yellow (rarely white or blue)
- ●Spike inflorescences enclosed in hard bracts
- ●Characteristic of nutrient-poor, acidic wetlands
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
Flower symmetry
Actinomorphic / Zygomorphic
Petal count
6 petals
Petal fusion
Free
Ovary position
Superior
Stamen count
1-2
Plant sex
Hermaphrodite
Phylogenetic Position
Angiosperms > Monocots > Poales > Xyridaceae
Divergence Era
Paleogene
Representative Genera
Related Evolution Events
- ・Range restriction through specialization to nutrient-poor wetlands
- ・Convergent adaptation to waterside ecosystems within Poales
Plants in Yellow-eyed grass family on this site
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