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Rhus sandwicensis

leaf Main Plant Information

Genus

Rhus

Species

sandwicensis

Hawaiian Names with Diacritics

  • Neleau
  • Neneleau

Hawaiian Names

  • Neleau
  • Neneleau

Common Names

  • Hawaiian sumac

Synonyms

  • Rhus chinensis var. sandwicensis
  • Rhus semialata var. sandwicensis

leaf Plant Characteristics

Distribution Status

Endemic

Endangered Species Status

No Status

Plant Form / Growth Habit

  • Shrub
  • Tree

Mature Size, Height (in feet)

  • Shrub, Medium, 6 to 10
  • Shrub, Tall, Greater than 10
  • Tree, Small, 15 to 30

Life Span

Long lived (Greater than 5 years)

Landscape Uses

  • Accent
  • Screening

Additional Landscape Use Information

Plants produce numerous root suckers and can become troublesome if planted near planting beds or areas where it is not welcomed.

Does well as a hedge or as a screen from roads.

Plant Produces Flowers

Yes

leaf Flower Characteristics

Flower Type

Showy

Flower Colors

  • Brownish
  • Red
  • White

Additional Flower Color Information

Whitish flowers with reddish brown fuzz (tomentose) are displayed in dense bunches.

Additional Blooming Period and Fruiting Information

Small round red fruits (drupes) about 1/8 inch (3 mm) in diameter are produced in abundance.

leaf Leaf Characteristics

Plant texture

  • Coarse

Additional Plant Texture Information

The leaves are green on the upper surface and paler on the lower surface. Leaves have a reddish tinge to them when they are younger.

Leaf Colors

  • Light Green
  • Medium Green

Additional Leaf Color Information

The new leaves (liko) are the most striking features of neleau. The colors can range from light pink, to mauve, orangish, bright red, brick red, to magenta and all shades in between. Older leaves are light to dark green.

leaf Pests and Diseases

Additional Pest & Disease Information

Ants can be a nuisance. Weeds at base of plants should be controlled.

leaf Growth Requirements

Pruning Information

Neleau can form dense stands and may require pruning to control. The root suckers can come up in unwanted areas.

Water Requirements

  • Moist

Additional Water Information

Neleau can be grown in dry to wet conditions.

Soil must be well drained

Yes

Light Conditions

  • Full sun
  • Partial sun

leaf Environmental Information

Natural Range

  • Kauaʻi
  • Oʻahu
  • Molokaʻi
  • Maui
  • Hawaiʻi

Natural Zones (Elevation in feet, Rainfall in inches)

  • 150 to 1000, 0 to 50 (Dry)
  • 150 to 1000, 50 to 100 (Mesic)
  • 150 to 1000, Greater than 100 (Wet)
  • 1000 to 1999, 0 to 50 (Dry)
  • 1000 to 1999, 50 to 100 (Mesic)
  • 1000 to 1999, Greater than 100 (Wet)
  • 2000 to 2999, 0 to 50 (Dry)
  • 2000 to 2999, 50 to 100 (Mesic)
  • 2000 to 2999, Greater than 100 (Wet)
  • 3000 to 3999, 0 to 50 (Dry)
  • 3000 to 3999, 50 to 100 (Mesic)
  • 3000 to 3999, Greater than 100 (Wet)
  • 4000 to 4999, 0 to 50 (Dry)
  • 4000 to 4999, 50 to 100 (Mesic)
  • 4000 to 4999, Greater than 100 (Wet)

Habitat

  • Terrestrial

Additional Habitat Information

Neleau is found in scattered locations throughout its range and most common near Hilo and Waimea (Kamuela) on Hawaiʻi Island from around 500 to over 7,000 feet.

On Kauaʻi, neleau can be seen at Makaweli, and Kamaliʻi Ridge; on Oʻahu, at Nuʻuanu and Moanalua valleys, and at Hoʻomaluhia; and on Molokaʻi, in Pelekunu Valley.

 

leaf Special Features and Information

General Information

Neleau (Rhus sandwicensis) belongs to the Mango or Cashew family (Anacardiaceae). This is the only member native and endemic to the Hawaiian Islands.

Some well known edible kin include mango (Mangifera spp.), cashew (Anacardium occidentale), and pistachio (Pistachia vera). The highly invasive Christmas berry (Schinus terebinthifolius) is on the family list as well.

The family also has some unsavory characters in aptly named genus Toxicodendron, meaning "poison tree," and they include poison-ivy, poison-oak, and poison sumac--the latter is perhaps the most toxic plant in the United States.

Etymology

The generic name Rhus is derived from rhous, the Greek name for sumac.

The species name sandwicensis refers to the "Sandwich Islands," as the Hawaiian Islands were once called, and named by James Cook on one of his voyages in the 1770's. James Cook named the islands after John Montagu (The fourth Earl of Sandwich) for supporting Cook's voyages.

Background Information

Bruce Bohm, botanist, notes that neleau (Rhus sandwicensis) "does not produce the phenolic compounds typical of its toxic cousins." Bohm goes on to say that "people to whom I have spoken have never experienced skin problems when handling the plant, and I did not have any reaction when I handled it (I have been sensitized to poison oak, but do not react to mangoes or lacquer ware)." [4]

The fruits are reported to be edible. [3]

Early Hawaiian Use

Neleau was used in making calabashes. [2]

Modern Use

Neleau is one of the few native plants that re-colonize old [sugar] cane fields and waste lands at low elevations. [J.B. Friday, College of Tropical Agriculture and Human Resources, Hilo, Hawaiʻi]

The light but tough yellowish-gray wood of neleau was once used as saddle trees on ranches and to make plows and yokes for oxen by ranchers. [1,3] The wood is described as yellowish-gray with dark resinous streaks, light weight, coarse-textured, and tough. [3]

The bark was formerly used in tanning goat skins in Hawaiʻi. [3]

Additional References

[1] "The Indigenous Trees of the Hawaiian Islands" by J.F. Rock, page 263.

[2] "Auwahi: Ethnobotany of a Hawaiian Dryland Forest" by A.C. Medeiros, C.F. Davenport & C.G. Chimera, page 15.

[3] "Common Forest Trees of Hawaii (Native and Introduced)" by Elbert L. Little Jr. and Roger G. Skolmen, page 194.

[4] "Floridata, Hawaiian Plants" by Bruce Bohm http://www.floridata.com/tracks/bruce/hi/Amaranthaceae_Anacardiaceae.cfm [Accessed 03/13/12]

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