Argyroxiphium kauense

General Plant Information (Edit)
Plant Habit: Shrub
Sun Requirements: Full Sun
Full Sun to Partial Shade
Minimum cold hardiness: Zone 10a -1.1 °C (30 °F) to +1.7 °C (35 °F)
Maximum recommended zone: Zone 10a
Plant Height: 7 ft / 2.5m
Plant Spread: 2 ft / 7dm
Leaves: Evergreen
Fruit: Other: Achenes
Flowers: Showy
Flower Color: Red
Bloom Size: Under 1"
Flower Time: Summer
Foliage Mound Height: 2 ft / 7dm
Underground structures: Taproot
Suitable Locations: Bog gardening
Toxicity: Other: Not poisonous.
Propagation: Seeds: Provide light
Needs specific temperature: Specific to montane bogs.
Containers: Not suitable for containers
Miscellaneous: Endangered: Listed Endangered
Conservation status: Critically Endangered (CR)
Parentage: Tar Weeds

Conservation status:
Conservation status: Critically Endangered
Plants growing in typical boggy habitat.

Posted by Metrosideros (Puna, HI - Zone 10b) on Feb 24, 2014 12:19 PM

The Ka'u Silversword is an endangered species that is specific to boggy areas of montane Mauna Loa, which is also where the feral animals, which threaten the plant, like to hang out. The last natural population of the plant is at Kahuku Ranch, which the National Park Service has recently acquired. The plant is being saved from extinction by being cultivated in favorable habitat in Hawai'i Volcanoes National Park, and at Kulani, on the Island of Hawai'i.

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