Koelreuteria paniculata Laxm.

golden rain-tree

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New England Distribution

Adapted from BONAP data

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North America Distribution

Adapted from BONAP data

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Facts About

Golden rain-tree is aptly named for its showers of showy, yellow flowers that bloom in June and July. Tolerant of pollution and challenging soils, this species is a common street tree in the southern U. S., but it reaches the northern edge of its range in Massachusetts and Connecticut. This species is a member of a predominantly tropical family (Sapindaceae), and originates from China and Korea. Like many "tropical" trees, its young leaves are pinkish when first emerging. Papery, lantern-shaped fruits are produced in the fall.

Habitat

Anthropogenic (man-made or disturbed habitats), forest edges, forests

Characteristics

Habitat
terrestrial
New England state
Massachusetts
Growth form
the plant is a tree
Leaf type
the leaf blade is compound (i.e., made up of two or more discrete leaflets
Leaves per node
there is one leaf per node along the stem
Leaf blade edges
  • the edge of the leaf blade has lobes, or it has both teeth and lobes
  • the edge of the leaf blade has teeth
Leaf duration
the leaves drop off in winter (or they wither but persist on the plant)
armature on plant
the plant does not have spines, prickles, or thorns
Leaf blade length
Up to 350 mm
Leaf stalk
the leaves have leaf stalks
Bark texture
the bark of an adult plant is ridged or plated
Twig winter color
  • brown
  • red
Bud scale number
there are two scales on the winter bud, and their edges meet
Show All Characteristics
  • Buds or leaf scars
    Bud scale number
    there are two scales on the winter bud, and their edges meet
    Bud scar shape (Fraxinus)
    NA
    Collateral buds
    there are no collateral buds on the sides of the branches
    Superposed buds
    there are no superposed buds on the branch
  • Flowers
    Carpels fused
    the carpels are fused to one another
    Enlarged sterile flowers
    there are no enlarged sterile flowers on the plant
    Flower petal color
    yellow or green
    Flower symmetry
    there are two or more ways to evenly divide the flower (the flower is radially symmetrical)
    Hairs on ovary (Amelanchier)
    NA
    Hypanthium present
    the flower does not have a hypanthium
    Inflorescence type
    the inflorescence is a panicle (branched with the individual flowers on stalks)
    Number of pistils
    1
    Ovary position
    the ovary is above the point of petal and/or sepal attachment
    Petal and sepal arrangement
    the flower includes two cycles of petal- or sepal-like structures
    Petal appearance
    the petals are thin and delicate, and pigmented (colored other than green or brown)
    Sepal cilia (Ilex)
    NA
    Sepal tip glands
    there are glands at the tips of the sepal lobes
    Stamen number
    8
  • Fruits or seeds
    Berry color
    NA
    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)
    Nut with spines (Fagaceae)
    NA
    Wings on fruit
    there are no wings on the fruit
  • Glands or sap
    Sap color
    the sap is clear and watery
    Stalked glands on fruit (Rosa)
    NA
  • Growth form
    Growth form
    the plant is a tree
  • Leaves
    Hairs on upper side of leaf blade
    the upper side of the leaf is not hairy, or has very few hairs
    Leaf blade base shape
    the base of the leaf blade is truncate (ends abruptly in a more or less straight line as though cut off)
    Leaf blade edges
    • the edge of the leaf blade has lobes, or it has both teeth and lobes
    • the edge of the leaf blade has teeth
    Leaf blade edges (Acer)
    NA
    Leaf blade hairs
    • the hairs on the leaf blade are different from the choices given
    • the leaf blade has tangled or woolly-looking hairs, without glands
    Leaf blade length
    Up to 350 mm
    Leaf blade shape
    • the leaf blade is elliptic (widest near the middle and tapering at both ends)
    • the leaf blade is ovate (widest below the middle and broadly tapering at both ends)
    Leaf duration
    the leaves drop off in winter (or they wither but persist on the plant)
    Leaf lobe tips (Quercus)
    NA
    Leaf stalk
    the leaves have leaf stalks
    Leaf stalk nectaries
    there are no nectaries on the leaf stalk
    Leaf teeth
    • the leaf blade margin is crenate (with rounded teeth) or crenulate (with tiny, rounded teeth)
    • the leaf blade margin is serrate (with forward-pointing) or dentate (with outward-pointing) with medium-sized to coarse teeth
    Leaf teeth hairs (Carya)
    NA
    Leaf type
    the leaf blade is compound (i.e., made up of two or more discrete leaflets
    Leaves per node
    there is one leaf per node along the stem
    Specific leaf type
    the leaf is compound, with a single terminal leaflet and more than two additional leaflets
  • Place
    Habitat
    terrestrial
    New England state
    Massachusetts
    Specific habitat
    • edges of forests
    • forests
    • man-made or disturbed habitats
  • Stem, shoot, branch
    Aerial roots
    the plant has no aerial roots
    Bark texture
    the bark of an adult plant is ridged or plated
    Branch brittleness (willows only)
    NA
    First-year cane (Rubus)
    NA
    Twig papillae (Vaccinium species only)
    NA
    Twig winter color
    • brown
    • red
    Wings on branch
    the branch does not have wings on it
    armature on plant
    the plant does not have spines, prickles, or thorns

Wetland Status

Not classified

New England Distribution and Conservation Status

Distribution

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

Conservation Status

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

Massachusetts
not applicable (S-rank: SNA)

Native to North America?

No

Family

Sapindaceae

Genus

Koelreuteria

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Information from Dichotomous Key of Flora Novae Angliae

1.  Koelreuteria paniculata Laxm. E

golden rain-tree. MA. Roadsides, forest borders and fragments, waste areas.