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Plant Database

Search for native plants by scientific name, common name or family. If you are not sure what you are looking for, try the Combination Search or our Recommended Species lists.

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Isodendrion longifolium

Isodendrion longifolium A. Gray

Longleaf Isodendrion

Violaceae (Violet family)

Synonym(s): Isodendrion maculatum

USDA Symbol: ISLO2

USDA Native Status: HI (N)

Rare. Shrub with sweetly-fragrant flowers.

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: Lanceolate
Leaf Pubescence: Villose
Leaf Texture: Leathery
Breeding System: Flowers Bisexual
Inflorescence: Axillary
Size Notes: From 60 to 200 cm. in height.
Leaf: Stipules glabrous, 1.9 to 3 mm long, obliquely linear-lanceolate. Leaves glabrous, subcoriaceous, finely reticulate-veined, linear-oblanceolate 6.5 to 22 cm long, 11 to 30 mm wide, obscurely undulate, remotely low sub-serrate or distinctly serrulate, base abruptly short cuneate, apex subacute. (Reslit: 2850).
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; lower petal 6 to 10 mm long. Stamens 5, unequal or subequal, free on the receptacle, not apiculate; 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: Gulch slopes and bottoms in moist or sometimes wet forests. (Webref: 28).

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: Q109
Status: Threatened
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 27 - USDA Plants Database (2018) USDA, NRCS.

Additional resources

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

Metadata

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

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