Ceanothus is a genus of about 50–60 species of nitrogen-fixing shrubs and small trees in the buckthorn family (Rhamnaceae). Common names for members of this genus are buckbrush, California lilac, soap bush, or just ceanothus. "Ceonothus" comes from Ancient Greek: κεάνωθος (keanōthos), which was applied by Theophrastus to an Old World plant believed to be Cirsium arvense.
Brighamia insignis, commonly known as ʻŌlulu or Alula in Hawaiian, or colloquially as the vulcan palm or cabbage on a stick, is a 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.
Lipochaeta succulenta, the seaside nehe, is a plant endemic to all the main Hawaiian islands except Lanai.
Hibiscadelphus distans is an extremely rare species of flowering plant in the mallow family, Malvaceae, that is endemic to the island of Kauaʻi in Hawaii. It is known as hau kuahiwi in Hawaiian, which means "upland Hibiscus tiliaceus." It is a bush or small tree with heart-shaped leaves and yellow flowers and grows at between 1,000 and 1,800 feet in the remnants of native dry forests. Despite its rarity, it is believed to be the only surviving species in the genus Hibiscadelphus which is only known from Hawaii, the other five species having recently become extinct in the wild, some being known from only a single plant.
Kokia kauaiensis, the Kauai treecotton or Kauaʻi Kokiʻo, is a species of flowering plant in the mallow family, Malvaceae, that is endemic to Kauaʻi, Hawaii.
Salix exigua is a species of willow native to most of North America except for the southeast and far north, occurring from Alaska east to New Brunswick, and south to northern Mexico. It is considered a threatened species in Massachusetts while in Connecticut, Maryland, and New Hampshire it is considered endangered.
Heterotheca sessiliflora is a species of flowering plant in the family Asteraceae known by the common name sessileflower false goldenaster. It is native to California, Sonora, and Baja California.
Lipochaeta, common name nehe, is a genus of flowering plants in the family Asteraceae that is endemic to Hawaii.
Melanthera, squarestem, is a genus of flowering plants in the family Asteraceae, native to North and South America, as well as Africa, Asia and Oceania, including Hawaiʻi.
Wilkesia hobdyi, the dwarf iliau, is a species of flowering plant in the family Asteraceae that is endemic to the island of Kauaʻi in Hawaii. It was first collected in 1968, and was not formally described until 1971. The number of living plants is estimated at fewer than 300. It is considered Critically Imperiled in global rank which means it is at very high risk of extinction. It has been a federally protected species since 1992. The genus Wilkesia is one of three genera constituting the silversword alliance, a group of highly diverse yet genetically exceedingly closely related species, all thought to be descended from a colonizing ancestor related to the tarweed of North America.
Polygonum polygaloides is a North American species of flowering plants in the buckwheat family known by the common names milkwort knotweed and polygala knotweed. It is native to much of western North America, where it can be found in many types of moist habitat. It is a variable species, usually divided into a number of subspecies.
Solidago californica is a species of goldenrod known by the common name California goldenrod.
Melanthera fauriei, known by the common name Olokele Canyon nehe, is a rare species of flowering plant in the aster family.
Melanthera kamolensis, known by the common name Maui nehe, is a rare species of flowering plant in the family Asteraceae.
Lipochaeta lobata is a species of flowering plant in the family Asteraceae known by the common name shrubland nehe. It is endemic to Hawaii, where it can be found in coastal dry shrublands and dry forests on Oʻahu, Maui, and Niʻihau.
Melanthera tenuifolia is a rare species of flowering plant in the family Asteraceae known by the common names Waianae Range nehe and slender-leaf nehe.
Melanthera venosa is a rare species of flowering plant in the family Asteraceae known by the common name spreading nehe. It is endemic to Hawaii, where it is known only from the island of Hawaii. It is federally listed as an endangered species of the United States.
Melanthera waimeaensis is a rare species of flowering plant in the family Asteraceae known by the common name Waimea Canyon nehe. It is endemic to Hawaii, where it is known only from the island of Kauai. It is federally listed as an endangered species of the United States.
Schiedea attenuata is a rare species of flowering plant in the family Caryophyllaceae known by the common name Kalalau schiedea. It is endemic to Hawaii, where it is known only from the Kalalau Valley on the island of Kauai. It is threatened by the degradation of its habitat. It was federally listed as an endangered species of the United States in 2010.
Corydalis micrantha is a species of flowering plant in the poppy family (Papaveraceae), native to the United States. Common names include smallflower fumewort, southern corydalis, and golden corydalis.
