Plants named in 1991

Persoonia terminalis, also known as the Torrington geebung, is a shrub belonging to the family Proteaceae, and native to northern New South Wales and southern Queensland in eastern Australia. Reported as a subspecies of Persoonia nutans in 1981, it was described as a species by Lawrie Johnson and his colleague Peter Weston in 1991. Two subspecies‍—‌P. t. terminalis and P. t. recurva‍—‌are recognised; both are found on well-drained acidic soils in sclerophyll forests, and P. t. terminalis is also found on granite outcrops. Although similar in appearance, they differ in leaf length and

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Chlorocardium rodiei (greenheart) is a species of flowering plant in the family Lauraceae. It is one of three species in the genus Chlorocardium. It is native to Guyana and Suriname, both in South America. Other common names include cogwood, demerara greenheart, greenhart, ispingo moena, sipiri, bebeeru and bibiru. It is an evergreen tree growing 15 to 30 m tall, with a trunk diameter of 35 to 60 cm. Its leaves are oppositely arranged and simple with smooth edges. Its fruit is a drupe containing a single seed. The cyclic bisbenzylisoquinoline alkaloid rodiasine was first isolated from this

Disocactus phyllanthoides, the nopalxochitl or German empress, is a species of flowering plant in the cactus family Cactaceae. It is commonly grown as an ornamental houseplant. It is one of the three major species involved in creating the widely grown epiphyllum hybrids or "epis". The others are Disocactus speciosus and Disocactus crenatus.

Chlorocardium is a genus of the family Lauraceae. It contains only three species, C. esmeraldense, C. rodiei and C. venenosum, and is native to northern South America. The name Chlorocardium means green (chloro-) heart (cardia), referring to the wood. They are trees up to 40 m high, mostly 30 m high, and are hermaphrodites. They are slow-growing canopy evergreen trees and have a valuable timber. The wood and bark are pleasantly scented. They are present in Peru, Ecuador, Colombia, and the Guiana Shield (in northeastern Brazil, Venezuela (Amazonas, Bolívar and Delta Amacuro states), Guyana,

Aphandra is a monotypic genus of flowering plants in the palm family native to the Amazon rainforest vegetation in South America (Ecuador, Brazil, and Peru). Its only species is Aphandra natalia, sometimes called mastodon palm or fiber palm, and is used by indigenous peoples in the construction of brooms and other products. This plant is commercially exploited for its edible fruits, and for its leaf sheath and petiole fibers. This fiber is almost equal to the fiber extracted from Attalea funifera and Leopoldinia piassaba, which is called piassava. The genus name is a combination of Ammandra

Alloxylon is a genus of four species in the family Proteaceae of mainly small to medium-sized trees. They are native to the eastern coast of Australia, with one species, A. brachycarpum, found in New Guinea and the Aru Islands. The genus is a relatively new creation, being split off from Oreocallis in 1991. The name is derived from Ancient Greek allo- "other" or "strange" and xylon or "wood" due to their unusual cell architecture compared with the related genera Telopea and Oreocallis. In Australia, they are known as tree waratahs due to similarities in the inflorescences between them and the

Sabal gretheriae is a species of palm tree that is endemic to the state of Quintana Roo in Mexico, where it is threatened by habitat loss. It was described by Hermililo J. Quero in 1991. The specific epithet, "gretheriae", honors Rosaura Grether, a botanist who worked with Quero. It is very similar to the Mexican Palmetto (S. mexicana) and may be synonym of that species.

Pseudognaphalium affine is a species of flowering plant belonging to the genus Pseudognaphalium. The species is widely distributed in East Asia, Southeast Asia, South Asia, Transcaucasus and Anatolia. The plant is biennial, with stems 15–40 cm long, the surface of the plant is covered with fine woolly hair and the leaves are small and rounded. The flowers appear as small florets with petal around 2 mm long. In Mainland China and Taiwan, this plant is used to make rice-flour pastry (such as chháu-á-kóe) for the Qingming Festival. In Japan, it is one of the herbs consumed during the Seven-Herbs

Phalaenopsis bastianii is a species of orchid endemic to the Philippines. Similar in form to a miniature Phalaenopsis lueddemanniana, the colour of the flower is similar to that of Phalaenopsis mariae.

Eucalyptus abdita is a species of mallee with smooth grey bark and cone-shaped to barrel-shaped fuit, that is native to disjunct areas to the north and north-east of Perth, Western Australia.

Allium tardiflorum is a plant species found in Israel. It is a bulb-forming perennial producing an umbel of flowers late in the season, in September or October. Flowers are on long pedicels, forming a lax umbel. Tepals are green with purple midveins and purple margins.

Adiantum viridimontanum, commonly known as Green Mountain maidenhair fern, is a fern found only in outcrops of serpentine rock in New England and Eastern Canada. The leaf blade is cut into finger-like segments, themselves once-divided, which are borne on the outer side of a curved, dark, glossy rachis. These finger-like segments are not individual leaves, but parts of a single compound leaf. The "fingers" may be drooping or erect, depending on whether the individual fern grows in shade or sunlight. Spores are borne under false indusia at the edge of the subdivisions of the leaf, a

Pleuranthodium is a genus of flowering plants in the ginger family Zingiberaceae. Of the 23 known species, 21 are endemic to New Guinea, one to Queensland and one to the Bismarck Archipelago.

Papuacalia is a genus of New Guinean flowering plants in the groundsel tribe within the sunflower family. Species

Nepenthes faizaliana is a tropical pitcher plant endemic to the limestone cliffs of Gunung Mulu National Park in Sarawak, Borneo. It is thought to be most closely related to N. boschiana.

Eucalyptus tricarpa, commonly known as red ironbark or mugga ironbark, is a species of tree that is endemic to south-eastern Australia. It has thick, rough ironbark on the trunk and branches, lance-shaped adult leaves, flower buds usually in groups of three, white flowers and cylindrical or spherical fruit.

Englerophytum magalismontanum, commonly known as stamvrug, is an evergreen tree that mostly grows in rocky places. It has an extensive range, from northern KwaZulu-Natal northwards along the east coast and into the southern African interior, and northwards into tropical Africa.

Disocactus speciosus, the sun cactus, is a species of flowering plant in the family Cactaceae. It is native to Mexico, Honduras and Guatemala, and has been introduced to the Canary Islands. As its synonym Heliocereus speciosus it has gained the Royal Horticultural Society's Award of Garden Merit.

Arthrocereus glaziovii is a species of flowering plant in the family Cactaceae. It is succulent cactus subshrub endemic to southeastern Brazil. Its natural habitat is rocky areas. It is threatened by habitat loss.

Almaleea is a genus of perennial shrubs from the family Fabaceae native to Australia.

Alloxylon flammeum, commonly known as the Queensland tree waratah or red silky oak, is a medium-sized tree of the family Proteaceae found in the Queensland tropical rain forests of northeastern Australia. It has shiny green elliptical leaves up to 18 cm (7.1 in) long, and prominent orange-red inflorescences that appear from August to October, followed by rectangular woody seed pods that ripen in February and March. Juvenile plants have large (up to 25 cm (9.8 in) long) deeply lobed pinnate leaves. Previously known as Oreocallis wickhamii, the initial specimen turned out to be a different

Adiantum aleuticum, the western maidenhair fern or Aleutian maidenhair, is a species of deciduous fern in the genus Adiantum.

Wamalchitamia is a genus of Mesoamerican flowering plants in the family Asteraceae. Species Wamalchitamia appressipila (S.F.Blake) Strother - Chiapas Wamalchitamia aurantiaca (Klatt) Strother - Chiapas, Oaxaca, Guatemala, Honduras, Nicaragua, Costa Rica Wamalchitamia dionysi Strother - Chiapas Wamalchitamia strigosa (DC.) Strother - Chiapas, Oaxaca Wamalchitamia williamsii (Standl. & Steyerm.) Strother - Honduras, Nicaragua

Jefea is a genus of North American flowering plants in the family Asteraceae, native to Mexico and the southwestern United States. These are shrubs up to 200 cm (80 inches) tall, with yellow or orange flower heads containing both ray and disc flowers. Species Jefea brevifolia (A.Gray) Strother - Chihuahua, Coahuila, Nuevo León, Zacatecas, San Luis Potosí, Texas, New Mexico Jefea gnaphalioides (A.Gray) Strother - Tamaulipas, Nuevo León Jefea lantanifolia (S.Schauer) Strother - Tamaulipas, Nuevo León, Querétaro, San Luis Potosí, Hidalgo Jefea pringlei (Greenm.) Strother - Oaxaca, Puebla

Gasteria glomerata, the Kouga gasteria, is a small succulent plant native to the Eastern Cape, South Africa.

Euphorbia vajravelui is a plant species in the family Euphorbiaceae. It is endemic to Tamil Nadu in India.

Euphorbia cremersii is a species of plant in the family Euphorbiaceae. It is endemic to Madagascar. Its natural habitat is subtropical or tropical dry forests. It is threatened by habitat loss.

Euphorbia bulbispina is a spiny plant of the family Euphorbiaceae. It was described by Rauh & Razafindratsira in Euphorbia Journal 7: 31. 1991. It is endemic to a very small area in northern Madagascar where it is found in rock cracks in the Antsiranana district. It has been assessed as vulnerable on the IUCN Red List.

Elaphandra is a genus of flowering plants in the family Asteraceae. species The genus is primarily native to South America, with one species extending into Trinidad and Tobago and another into Panama.