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Native Plant Trust: Go Botany Discover thousands of New England plants

Xyris torta — slender yellow-eyed-grass

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Facts

Slender yellow-eyed-grass is common on peaty and sandy pond and lake shores and in bogs. This species has a patchy distribution in the eastern half of the United States, and it is absent from Maine and Vermont.

Habitat

Bogs, fens, shores of rivers or lakes

New England distribution

Adapted from BONAP data

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North America distribution

Adapted from BONAP data

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Characteristics

Habitat
wetlands
New England state
  • Connecticut
  • Massachusetts
  • New Hampshire
  • Rhode Island
Leaf arrangement
alternate: there is one leaf per node along the stem
Leaf blade shape
the leaf blade is linear (very narrow with more or less parallel sides)
Leaf blade length
200–500 mm
Flower petal color
  • pink to red
  • white
  • yellow
Flower petal length
4 mm
Petal fusion
  • the perianth parts are fused to form a tube, cup, or bell shape
  • the perianth parts are separate
Inflorescence type
the inflorescence is a spike (a long unbranched stem with flowers along it that lack stalks)
Ovary position
the ovary is above the point of petal and/or sepal attachment
Fruit type (specific)
the fruit is a capsule (splits along two or more seams, apical teeth or pores when dry, to release two or more seeds)
Show all characteristics

  • Clonal plantlets

    Axillary bulblets
    there are no bulblets being produced in axils

  • Flowers

    Anther attachment
    the anther is attached by its base to the filament
    Bulblets replace flowers
    there are no bulblets where the flowers are located
    Carpels fused
    the carpels are fused (the number of carpels equals the number of locules)
    Flower petal color
    • pink to red
    • white
    • yellow
    Flower petal length
    4 mm
    Flower symmetry
    • there are two or more ways to evenly divide the flower (the flower is radially symmetrical)
    • there is only one way to evenly divide the flower (the flower is bilaterally symmetrical)
    Form of style
    the style is branched above the base
    Fringed petal edges
    the petals are not fringed
    Hairs on flower stalk
    NA
    Inflorescence length
    8–25 mm
    Inflorescence type
    the inflorescence is a spike (a long unbranched stem with flowers along it that lack stalks)
    Marks on petals
    there are no noticeable marks on the petals
    Nectar spur
    the flower has no nectar spurs
    Number of pistils
    1
    Number of styles
    1
    Ovary position
    the ovary is above the point of petal and/or sepal attachment
    Petal appearance
    the petals are thin and delicate, and pigmented (colored other than green or brown)
    Petal fusion
    • the perianth parts are fused to form a tube, cup, or bell shape
    • the perianth parts are separate
    Sepal appearance
    the sepals resemble leaves in color and texture
    Sepal length
    4.5–5.5 mm
    Sepals fused only to sepals
    the sepals are separate from one another
    Spathe
    the plant does not have a spathe
    Spathe form
    NA
    Stamen number
    3
    Stamen position relative to petals
    the stamens are lined up with the sepals
    Stamens fused outwards
    the stamens are fused to the petals or tepals at or near their bases
    Style petal-like
    the style is not broad and flattened like a petal
    Tepals
    the petals and sepals are different in size and color

  • Fruits or seeds

    Berry color
    NA
    Capsule ridges
    there are no ribs or wings on the capsule
    Fruit compartments
    there is only one locule in the fruit
    Fruit type (general)
    the fruit is dry and splits open when ripe
    Fruit type (specific)
    the fruit is a capsule (splits along two or more seams, apical teeth or pores when dry, to release two or more seeds)
    Other markings on berry
    NA

  • Glands or sap

    Sap
    the sap is clear and watery

  • Growth form

    Lifespan
    the plant lives more than two years
    Underground organs
    the plant has one or more swollen storage organs underground, such as bulbs, tubers or corms

  • Leaves

    Leaf arrangement
    alternate: there is one leaf per node along the stem
    Leaf blade basal lobes
    the leaf blades do not have basal lobes
    Leaf blade base
    the leaf has no stalk
    Leaf blade base shape
    the base of the leaf blade is cuneate (wedge-shaped, tapers to the base with relatively straight, converging edges), or narrow
    Leaf blade cross-section
    the leaf blade is more or less flat in cross-section
    Leaf blade faces
    the surfaces of the leaf blade are composed of tissues from the abaxial side only
    Leaf blade form
    Fully-formed (i.e., expanded), +/- green leaf blades are found somewhere on the plant
    Leaf blade length
    200–500 mm
    Leaf blade orientation
    the edge of the leaf blade faces the stem of the plant
    Leaf blade shape
    the leaf blade is linear (very narrow with more or less parallel sides)
    Leaf blade surface colors
    the upper side of the leaf blade is relatively uniform in color
    Leaf blade veins
    the lateral veins are parallel or slightly arched in the direction of the tip
    Leaf blade width
    2–5 mm
    Leaf type
    the leaves are simple (i.e., lobed or unlobed but not separated into leaflets
    Stipule twining
    NA
    Stipules
    there are no stipules on this plant

  • Place

    Habitat
    wetlands
    New England state
    • Connecticut
    • Massachusetts
    • New Hampshire
    • Rhode Island
    Specific habitat
    • bogs
    • fens
    • shores of rivers or lakes

  • Scent

    Plant odor
    the leaves have no particular smell

  • Stem, shoot, branch

    Flowering stem leaves
    there are no true leaves on the flowering stem

Wetland status

Occurs only in wetlands. (Wetland indicator code: OBL)

In New England

Distribution

Connecticut
present
Maine
absent
Massachusetts
present
New Hampshire
present
Rhode Island
present
Vermont
absent

Conservation status

Exact status definitions can vary from state to state. For details, please check with your state.

Massachusetts
fairly widespread (S-rank: S4)

From Flora Novae Angliae dichotomous key

4.  Xyris torta Sm. N

slender yellow-eyed-grass. Xyris bulbosa Kunth • CT, MA, NH, RI. Peaty and sandy pond and 
lake shores, boggy openings.

Native to North America?

Yes

Sometimes confused with

Xyris montana:
keel of lateral sepals weak, scarious, entire to lacerate, leaves plane, seeds 0.6-1 mm long, and base of plant not abruptly bulbous (vs. X. torta, with the keel of lateral sepals firm, ciliate except at the red-fimbriate tip, leaves twisted, seeds ca. 0.5 mm long, and base of plant abruptly bulbous).

Synonyms

  • Xyris bulbosa Kunth

Family

Xyridaceae

Genus

Xyris