Otto Degener

Biancaea decapetala, commonly known as shoofly, Mauritius or Mysore thorn or the cat's claw, is a tropical tree species originating in India.

Wiliwili (Erythrina sandwicensis) is a species of tree in the pea family, Fabaceae, that is endemic to the Hawaiian Islands. It is the only species of Erythrina that naturally occurs there. It is typically found in Hawaiian tropical dry forests on leeward island slopes up to an elevation of 600 m (2,000 ft). Wiliwili means "repeatedly twisted" in the Hawaiian language and refers to the seedpods, which dehisce, or twist open, to reveal the seeds.

Kokia cookei is a small, deciduous tree commonly known as the kokiʻo, Molokaʻi treecotton, Cooke's kokiʻo, or Molokaʻi kokiʻo. It is about 3 m (9.8 ft) in height, with simple leaves of 5 to 7 lobes, and large flowers. The fruit that the plant produces is composed of a five-lobed capsule that is dry and covered with short, dense hairs. The Kokia follows the typical flowering plant life cycle. It was distributed in the lowlands of the Hawaiian islands prior to going extinct in the wild in 1978. It survives only as grafted branches on other Kokia species trees. Conservation efforts, such as

Eugenia koolauensis, commonly known as Koʻolau eugenia or nioi, is a species of flowering plant in the myrtle family, Myrtaceae. It is endemic to Hawaii, where it could previously be found on the islands of Molokaʻi and Oʻahu; today populations only exist on the latter. This is a federally listed endangered species of the United States. It is one of two Eugenia species native to Hawaii, and the only endemic. It is a shrub or tree grows 2 to 7 meters tall. The tips of the branches and the undersides of the leaves are hairy. White flowers occur in the leaf axils.

Hibiscus clayi, common names red Kauai rosemallow, Clay's hibiscus or Kokiʻo ʻula (Hawaiian name), is a perennial angiosperm of the mallow family Malvaceae. This species has unique leaves that are round and toothed and grow in a decussate pattern.

Stenogyne kanehoana is a rare species of flowering plant in the mint family known by the common name Oahu stenogyne. It is endemic to Hawaii, where it is known only from the Waianae Range on the island of Oahu. It is a federally listed endangered species of the United States. This plant was feared extinct when the last known individuals died in 1996. Six plants were discovered in 2000, but by 2005 these were also dead. As of 2004 there was only a single individual remaining in the wild, a very large plant spanning over four meters which may actually be more than one individual growing

Kokia kauaiensis, the Kauaʻi treecotton or Kauaʻi kokiʻo, is a species of flowering plant in the mallow family, Malvaceae, that is endemic to Kauaʻi, Hawaii. It inhabits coastal mesic and mixed mesic forests at elevations of 350–660 m (1,150–2,170 ft). Associated plants include ʻahakea (Bobea spp.), koa (Acacia koa), lama (Diospyros sandwicensis), manono (Hedyotis spp.), hala pepe (Pleomele aurea), aupaka (Isodendrion spp.), papala kepau (Pisonia spp.), olopua (Nestegis sandwicensis), ʻōhiʻa hā (Syzygium sandwicensis), hame (Antidesma spp.), maile (Alyxia oliviformis), ʻālaʻa (Pouteria

Euphorbia kuwaleana (syn. Chamaesyce kuwaleana) is a rare species of flowering plant in the euphorb family known by the common name kokomalei. It is endemic to Oahu, Hawaii, where it is known only from a four-kilometer stretch of the Waianae Range. Like other Hawaiian euphorbs, this plant is known locally as `akoko. It is a federally listed endangered species of the United States. This is a shrub that grows on bare, exposed basalt cliffs. The stems grow to a maximum length approaching one meter and they contain a milky sap. The new stems are reddish in color and age to a waxy gray. The leaves

Canavalia molokaiensis, commonly known as the Molokaʻi Jack-bean or puakauhi, is a rare species flowering plant in the legume family, Fabaceae, that is endemic to the island of Molokaʻi in Hawaii. This and other Hawaiian Canavalia are known there as ʻāwikiwiki. The plant is a vine with red-purple pealike flowers. It inhabits exposed, steep cliffs in dry and mesic forests that are dominated by ʻōhiʻa lehua (Metrosideros polymorpha) and ʻaʻaliʻi (Dodonaea viscosa) at elevations of 850–930 m (2,790–3,050 ft). Associated plants include ʻāhinahina (Artemisia spp.), ʻakoko (Euphorbia spp.), pilo

Notelaea sandwicensis, commonly known as Hawaiʻi olive or olopua, is a species of flowering tree in the olive family, Oleaceae, that is endemic to the major islands of the Hawaiian Islands.

Rumex skottsbergii, or more commonly known as lava dock, is a shrub of the genus Rumex. The genus comprises approximately 200 species all derived from a single species and are therefore monophyletic. Furthermore, Rumex skottsbergii is endemic to Hawaii, where it is known as pāwale. Pāwale are commonly found in open lava fields that are at low elevations which range from 460-1300m. A similar plant in this genus is Rumex giganteus. Their similarity lies between their erect nature and leaves. However, the difference lies in their inflorescences. The inflorescences is described as being a cluster

Canavalia hawaiiensis commonly known as 'āwikiwiki or Hawaiian jackbean, is a low growing vine of the pea family (Fabaceae) and endemic to Hawaiʻi.

Schiedea haleakalensis is a rare species of flowering plant in the family Caryophyllaceae known by the common name Haleakalā schiedea. It is endemic to Hawaii, where it is known only from Haleakalā National Park on the island of Maui. It is threatened by the degradation of its habitat. It was federally listed as an endangered species of the United States in 1992. Its native habitat includes dry subalpine cliffs with native shrubs. This plant is a shrub growing up 30 to 60 centimeters tall. The leaves have narrow blades measuring up to 8 centimeters long but just a few millimeters in width.

Scaevola kilaueae, the Kīlauea naupaka, is a species of fanflower endemic to the eastern windward side of the island of Hawaiʻi.

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The Mauna Loa silversword, Argyroxiphium kauense, or Kaʻū silversword, is a rare species of flowering plant in the aster family. It is endemic to the eastern and southern slopes of Mauna Loa on the island of Hawaiʻi. A. kauense occurs in mountainous shrublands, bogs, and open mesic forest. The species is managed by the National Park Service and Hawaiʻi State Department of Forestry and Wildlife. It is a federally listed endangered species of the United States. There are three known populations remaining, for a total of fewer than 1000 individuals.

Argyroxiphium grayanum, commonly known as the greensword, is a species of flowering plant in the family Asteraceae, and a member of the silversword alliance, a group of over 50 species which are diverse in morphology and habitat but are genetically closely related. The silversword alliance provides a convincing natural case study in evolution by adaptive radiation, with the greensword representing one extreme of the genus' plasticity. Some Argyroxiphium, including the well-known Haleakala and Mauna Kea silverswords, live in harsh alpine desert-like conditions of heat, sun, wind, and aridity,

Schiedea sarmentosa is a rare species of flowering plant in the family Caryophyllaceae known by the common name cliff schiedea. It is endemic to Hawaii, where it is known only from the island of Molokai. It is threatened by the degradation and destruction of its habitat. It is a federally listed endangered species of the United States. This plant is a subshrub with many branches reaching 30 to 45 centimeters tall. It has very narrow, threadlike leaves up to 4.5 centimeters long oppositely arranged on the branches. The plant produces many inflorescences of flowers with green sepals and no

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Lipochaeta kamolensis known by the common name Maui nehe, is a rare species of flowering plant in the family Asteraceae.

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