Sir William Jackson Hooker was an English botanist and botanical illustrator, who became the first director of Kew when in 1841 it was recommended to be placed under state ownership as a botanic garden. At Kew he founded the Herbarium and enlarged the gardens and arboretum. The standard author abbreviation Hook. is used to indicate this person as the author when citing a botanical name.
Thuja occidentalis, also known as northern white-cedar, eastern white-cedar, or arborvitae, is an evergreen coniferous tree, in the cypress family Cupressaceae, which is native to eastern Canada and much of the north-central and northeastern United States. It is widely cultivated as an ornamental plant. It is not to be confused with Juniperus virginiana.
Mahonia is a formerly accepted genus of approximately 70 species of shrubs or, rarely, small trees with evergreen leaves in the family Berberidaceae, native to eastern Asia, the Himalaya, North America, and Central America. They are closely related to the genus Berberis and as of 2023 the majority of botanical sources list it as a synonym for Berberis.
Syringa vulgaris, the lilac or common lilac, is a species of flowering plant in the olive family Oleaceae, native to the Balkan Peninsula, where it grows on rocky hills. Grown in spring for its scented flowers, this large shrub or small tree is widely cultivated and has been naturalized in parts of Europe, Asia and North America. It is not regarded as an aggressive species. It is found in the wild in widely scattered sites, usually in the vicinity of past or present human habitations.
Calycanthus, called sweetshrub, is a genus of flowering plants in the family Calycanthaceae. The genus includes two to four species depending on taxonomic interpretation; three are accepted by most 21st century sources.
George Don was a Scottish botanist and plant collector.
Tiarella, the foamflowers, is a genus of flowering plants in the family Saxifragaceae. The generic name Tiarella means "little turban", which suggests the shape of the seed capsules. Worldwide there are seven species, one each in eastern Asia and western North America, plus five species in eastern North America. As of October 2022, the taxonomy of Tiarella in eastern North America is in flux.
Symphyotrichum ericoides, known as white heath aster, frost aster, or heath aster, is a species of flowering plant in the family Asteraceae native to much of central and eastern North America. It has been introduced to parts of Europe and western Asia.
Symphyotrichum novi-belgii, commonly called New York aster, is a species of flowering plant. It is the type species for Symphyotrichum, a genus in the family Asteraceae, whose species were once considered to be part of the genus Aster. Plants in both these genera are popularly known as Michaelmas daisy because they bloom around September 29, St. Michael’s Day.
Iris munzii is a species of iris which is endemic to the Sierra Nevada foothills of Tulare County, California, mostly in the vicinity of the Tule River. It is quite rare in the wild. Its common names include Tulare lavender iris and Munz's iris. Its flowers grow in inflorescences of three to four per stem, and are usually lighter shades of purple and blue with darker veining. Albinos are known.
Symphyotrichum lateriflorum is a species of flowering plant in the aster family (Asteraceae). Commonly known as calico aster, starved aster, and white woodland aster, it is native to eastern and central North America. It is a perennial and herbaceous plant that may reach heights up to 120 centimeters and widths up to 30 centimeters.
Eutrochium maculatum, the spotted joe-pyeweed, is a North American species of flowering plant in the family Asteraceae. It is widespread through much of the United States and Canada. It is the only species of the genus Eutrochium found west of the Great Plains.
Iris × germanica is the accepted name for a species of flowering plants in the family Iridaceae commonly known as the bearded iris or the German bearded iris. It is one of a group of hybrid origin. Varieties include I. × g. var. florentina.
Iris sanguinea is a rhizomatous flowering plant in the genus Iris and in the series Sibiricae. It is cultivated as an ornamental plant in temperate regions. It is one of the species considered a Japanese iris. It is from Asia, found between Russia, Mongolia, China, Japan and Korea. It has grey green leaves, an unbranched flowering stem and flowers in reddish-purple shades, from blue to blue-purple, red-violet, with a rare white variant.
Iris reticulata var. bakeriana is a variety of Iris reticulata, a plant in the genus Iris. It is sometimes treated as Iris bakeriana, especially in the USA.
Iris maackii is a species in the genus Iris; it is also in the subgenus Limniris and in the series Laevigatae. It is a rhizomatous perennial, from China and eastern Russia. It has sword-shaped grey-green leaves, and has many branched flowering stems that carry flowers in May that come in various shades of yellow.
Iris setosa, the bristle-pointed iris, is a species of flowering plant in the genus Iris of the family Iridaceae, it belongs the subgenus Limniris and the series Tripetalae. It is a rhizomatous perennial from a wide range across the Arctic sea, including Alaska, Maine, Canada, Russia, northeastern Asia, China, Korea and southwards to Japan. The plant has tall branching stems, mid green leaves and violet, purple-blue, violet-blue, blue, to lavender flowers. There are also plants with pink and white flowers.
Iris hookeriana is a plant species in the genus Iris, it is also in the subgenus Iris and in the section Pseudoregelia. It is a rhizomatous perennial, from the Himalayan mountains of India and Pakistan. It has long pale green or yellow green leaves, long slender stem and fragrant blue, purple or lilac flowers, that are mottled with a darker colour. It is cultivated as an ornamental plant in temperate regions.
Iris mesopotamica, the Mesopotamian iris, is a species in the genus Iris, it is also in the subgenus Iris. It is a rhizomatous perennial, from the middle East, within the countries of Iraq, Turkey, Syria and Israel. It has linear, grey-green or green broad leaves, tall stem with 2–3 branches, holding up to 9 scented flowers, in shades of violet, purple, lavender blue and light blue, with a yellow and white or orange and white beard. It is listed as a synonym of Iris germanica in some sources. It is cultivated as an ornamental plant in temperate regions, including being planted in graveyards and cemeteries but may also be used for celebrations and decoration.
Iris sari is a species in the genus Iris, it is also in the subgenus Iris and in section Oncocyclus. It is from the rocky steppes and hills of Turkey. It has curved or straight leaves, cream, greenish or yellowish flowers which are variable and veined with crimson, purple-brown, reddish brown, reddish-purple or black. It has a dark maroon, rich crimson or brown signal patch and gold or yellow beard.
