Biology:Brighamia insignis
| Brighamia insignis | |
|---|---|
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Scientific classification 
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| Kingdom: | Plantae |
| Clade: | Tracheophytes |
| Clade: | Angiosperms |
| Clade: | Eudicots |
| Clade: | Asterids |
| Order: | Asterales |
| Family: | Campanulaceae |
| Genus: | Brighamia |
| Species: | B. insignis
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| Binomial name | |
| Brighamia insignis A.Gray
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| Brighamia insignis is endemic to Hawaii[2] | |
| Synonyms[2] | |
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Brighamia insignis, commonly known as ʻŌlulu or Alula in Hawaiian,[3] or colloquially as the vulcan palm[4] or cabbage on a stick,[5] is an endangered species of Hawaiian lobelioid in the bellflower family, Campanulaceae. It is native to the islands of Kauaʻi and Niʻihau. This short-lived perennial species is a member of a unique endemic Hawaiian genus with only one other species.
Description
Brighamia insignis is a potentially branched plant with a succulent stem that is bulbous at the bottom and tapers toward the top, ending in a compact rosette of fleshy leaves. The stem is usually 1–2 m (3–7 ft) in height, but can reach 5 m (16 ft).[6] The plant blooms in September through November.[7] It has clusters of fragrant yellow flowers in groups of three to eight in the leaf axils. The scent has been compared to honeysuckle.[7] Petals are fused into a tube 7 to 14 cm (3 to 5 1⁄2 in) long. The fruit is a capsule 13 to 19 mm (1⁄2 to 3⁄4 in) long containing numerous seeds.[8]
Distribution and habitat
It is extremely rare. In 1994 the United States Fish and Wildlife Service reported five populations totaling 45 to 65 individuals, and listed the plant as an endangered species. As of today, the species is possibly extinct in the wild. The last single individual was recorded in the wild in 2014.[1]
Brighamia insignis is found at elevations from sea level to 480 m (1,570 ft) in mesic shrublands and dry forests that receive less than 170 cm (67 in) of annual rainfall. It grows on rocky ledges with little soil and steep sea cliffs.[6] Associated plants include ʻāhinahina (Artemisia spp.) ʻakoko (Euphorbia celastroides), alaheʻe (Psydrax odorata), kāwelu (Eragrostis variabilis), pili (Heteropogon contortus), kokiʻo ʻula (Hibiscus kokio), ʻānaunau (Lepidium serra), nehe (Lipochaeta succulenta), pokulakalaka (Munroidendron racemosum), and ʻilima (Sida fallax).[8]
Endangered status
According to the U.S. Botanic Garden, its only pollinator was a certain type of now-extinct hawk moth. This has made it all but impossible for B. insignis to reproduce on its own.[9] Therefore, individuals only produce seed when artificially pollinated by humans.[10]
Other threats to the species have included exotic plant species, feral goats and pigs, slugs, rats, fire, and infestations of carmine spider mites (Tetranychus cinnabarinus).[11][12] There is also a hiking trail near one of the populations.[11] The plant grows on steep, exposed cliffs and has been damaged by hurricanes and landslides.[12]
Cultivation
Despite its rarity in the wild it is not hard to cultivate in a nursery,[12] and it has come into use as a novel ornamental plant.[13]
Gallery
Flowers of the Brighamia insignis
Closeup of a flower
An alula plant at Limahuli Garden and Preserve, Kauaʻi.
References
- ↑ 1.0 1.1 Walsh, S. (2016). "Brighamia insignis". IUCN Red List of Threatened Species 2016: e.T44080A83789215. doi:10.2305/IUCN.UK.2016-2.RLTS.T44080A83789215.en. https://www.iucnredlist.org/species/44080/83789215. Retrieved 20 November 2021.
- ↑ 2.0 2.1 "Brighamia insignis A.Gray" (in en). Royal Botanic Gardens, Kew. http://www.plantsoftheworldonline.org/taxon/139643-1. Retrieved 15 June 2023.
- ↑ McDonald, Marie A.; Paul R. Weissich; Jean Cote (2003). Nā Lei Makamae: the Treasured Lei. University of Hawaii Press. p. 124. ISBN 978-0-8248-2649-9. https://books.google.com/books?id=WA246oBPf7UC.
- ↑ "Brighamia insignis , Hawaiian palm, Hawaiian vulcan palm, Hawaiian alula, Olulu palm, Cabbage tree, Cabbage on a stick - Shoot". Shootgardening.co.uk. https://www.shootgardening.co.uk/plant/brighamia-insignis.
- ↑ USDA Plants Profile
- ↑ 6.0 6.1 "Brighamia insignis". Meet the Plants. National Tropical Botanical Garden. http://ntbg.org/plants/plant_details.php?plantid=1923.
- ↑ 7.0 7.1 Hawaiian Native Plant Cultivation Database. University of Hawaii, Manoa.
- ↑ 8.0 8.1 "Brighamia insignis". CPC National Collection Plant Profiles. Center for Plant Conservation. 22 July 2008. http://www.centerforplantconservation.org/Collection/CPC_ViewProfile.asp?CPCNum=630.
- ↑ "Alula, Olulu". Hawaii's Species of Greatest Conservation Need: Process and SGCN Fact Sheets. Hawaii Department of Fish and Wildlife. http://www.state.hi.us/dlnr/dofaw/cwcs/files/Flora%20fact%20sheets/Bri_ins%20plant%20NTBG_OK.pdf.
- ↑ James Wong (16 January 2016). "Gardens: all hail the vulcan palm | James Wong | Life and style". The Guardian. https://www.theguardian.com/lifeandstyle/2016/jan/10/gardens-all-hail-the-vulcan-palm.
- ↑ 11.0 11.1 "The Nature Conservancy". http://www.natureserve.org/explorer/servlet/NatureServe?searchName=Brighamia+insignis.
- ↑ 12.0 12.1 12.2 USFWS. Brighamia insignis Five Year Review. January 18, 2008.
- ↑ National Tropical Botanical Garden
External links
- "Brighamia insignis". Hawaiian Native Plant Propagation Database. University of Hawaiʻi at Mānoa. http://www2.hawaii.edu/~eherring/hawnprop/bri-insi.htm.
Wikidata ☰ Q1934110 entry
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