Brighamia insignis
| Brighamia insignis | |
|---|---|
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| Scientific classification | |
| Kingdom: | Plantae |
| (unranked): | Angiosperms |
| (unranked): | Eudicots |
| (unranked): | Asterids |
| Order: | Asterales |
| Family: | Campanulaceae |
| Subfamily: | Lobelioideae |
| Genus: | Brighamia |
| Species: | B. insignis |
| Binomial name | |
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Brighamia insignis A.Gray |
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Brighamia insignis, commonly known as Ōlulu or Alula in Hawaiian, or colloquially as the vulcan palm or cabbage on a stick, is a critically 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. It is now 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.
B. 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 (3.3–6.6 ft) in height, but can reach 5 m (16 ft). The plant blooms in September through November. It has clusters of fragrant yellow flowers in groups of three to eight in the leaf axils. The scent has been compared to honeysuckle.Petals are fused into a tube 7 to 14 cm (2.8 to 5.5 in) long. The fruit is a capsule 13 to 19 mm (0.51 to 0.75 in) long containing numerous seeds.
B. 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. 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).
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