Isodendrion longifolium A. Gray
Violaceae (Violet family)
Synonym(s): Isodendrion maculatum
USDA Symbol: ISLO2
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 CharacteristicsDuration: Perennial
Leaf Arrangement: Alternate
Leaf Complexity: Simple
Leaf Shape: Lanceolate
Leaf Pubescence: Villose
Leaf Texture: Leathery
Breeding System: Flowers Bisexual
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 InformationBloom Color: White , Purple
Bloom Notes: Corollas white with purple longitudinal stripes.
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).
BenefitUse 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 StatusUSFWS Species Profile: Q109Status:
BibliographyBibref 1789 - Endangered and Threatened Wildlife and Plants; Determination of Endangered or Threatened Status for Fourteen Plant Taxa From the Hawaiian Islands (1996) Rogers, John G.
Bibref 1788 - The Families and Genera of Vascular Plants - Volume 11 (eBook) (2014) Kubitzki, K. (editor)
Search More Titles in Bibliography
Web ReferenceWebref 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 resourcesUSDA: Find Isodendrion longifolium in USDA Plants
FNA: Find Isodendrion longifolium in the Flora of North America (if available)
Google: Search Google for Isodendrion longifolium
MetadataRecord Modified: 2021-01-01
Research By: JAM