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Plant Database

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Isodendrion laurifolium

Isodendrion laurifolium A. Gray

Rockcliff Isodendrion

Violaceae (Violet family)

Synonym(s): Isodendrion forbesii, Isodendrion lydgatei, Isodendrion subsessilifolium, Isodendrion waianaeense

USDA Symbol: ISLA3

USDA Native Status: HI (N)

Rare. Short-lived perennial shrub; glabrous, erect, with a few short, ascending branchlets.

The major threats to this species are feral goat, pigs and competition with introduced plant species. (Bibref: 1789).

 

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Plant Characteristics

Duration: Perennial
Habit: Shrub
Leaf Arrangement: Alternate
Leaf Complexity: Simple
Leaf Shape: Elliptic , Lanceolate
Leaf Pubescence: Villose
Leaf Texture: Leathery
Breeding System: Flowers Bisexual
Inflorescence: Axillary
Size Notes: From 100 to 200 cm in height. (Webref: 28).
Leaf: Stipules glabrous or ciliate, 1.9 to 3 mm long, obliquely linear-lanceolate. Leaves glabrous, subcoriaceous, prominently reticulate-veined, linear-oblanceolate (Reslit: 2850). Blades 4 to 16 cm long, 1.5 to 5 cm wide (Bibref: 1789).
Flower: "Flowers solitary in axillary short shoots; corolla caducous, blue, weakly zygomorphic, petals prolonged into a "tube" with bottom petal slightly longer than others and weakly differentiated, scarcely saccate at base; filaments free, anthers dehiscing laterally". (Bibref: 1788). Sepals five, distinct, unequal, persistent, glabrous throughout. Petals five. Stamens 5, unequal or subequal, free on the receptacle ; filaments ligulate. (Reslit: 2850).
Fruit: Fruit is a capsule. (Bibref: 1786). Thick-walled. (Bibref: 1788). "Petals and stamens marcescent, persisting around the fruit." (Bibref: 1788).

Bloom Information

Bloom Color: White , Purple
Bloom Notes: Corollas white with purple longitudinal stripes.

Distribution

USA: HI
Native Distribution: Endemic to the Hawaiian islands of Oahu and Kauai. (Webref: 28).
Native Habitat: Moist, or rarely wet forests on gulch slopes. (Webref: 28). "Usually found at elevations between 376 and 1,163 m (1,233 and 3,817 ft) in diverse mesic forest dominated by Metrosideros polymorpha, Acacia koa or Diospyros spp." (Bibref: 1789)

Benefit

Use Ornamental: Owing to the rarity of this species and its imperilied status, no horticultural use is warranted.
Fragrant Flowers: yes

U.S. Fish & Wildlife Service Threatened & Endangered Status

USFWS Species Profile: Q108
Status: Endangered
Historic Range: U.S.A. (HI)
Critical Habitat: 17.96(a)
Special Rules: N/A
This information is derived from the U.S. Fish & Wildlife Serrvice Environmental Conservation Online System.

Web Reference

Webref 6 - Germplasm Resources Information Network - (GRIN) [Online Database] (2018) USDA, ARS, National Genetic Resources Program, National Germplasm Resources Laboratory, Beltsville, Maryland.
Webref 28 - NatureServe Explorer: An online encyclopedia of life (2018) NatureServe
Webref 27 - USDA Plants Database (2018) USDA, NRCS.

Additional resources

USDA: Find Isodendrion laurifolium in USDA Plants
FNA: Find Isodendrion laurifolium in the Flora of North America (if available)
Google: Search Google for Isodendrion laurifolium

Metadata

Record Modified: 2021-01-01
Research By: JAM

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