A herbarium is a collection of preserved plant specimens and associated data used for scientific study.
Cirsium palustre, the marsh thistle or European swamp thistle, is a herbaceous biennial flowering plant in the family Asteraceae.
Persicaria maculosa is an annual plant in the buckwheat family, Polygonaceae. Common names include lady's thumb, spotted lady's thumb, Jesusplant, and redshank. It is widespread across Eurasia from Iceland south to Portugal and east to Japan. It is also present as an introduced and invasive species in North America, where it was first noted in the Great Lakes region in 1843 and has now spread through most of the continent.
Hypochaeris radicata – also known as catsear, flatweed, cat's-ear, hairy cat's ear, or false dandelion – is a perennial, low-lying edible herb often found in lawns. The plant is native to Europe, but has also been introduced to the Americas, Japan, Australia, and New Zealand, where it can be an invasive weed. It is listed as a noxious weed in the northwestern U.S. state of Washington.
Persicaria lapathifolia, known as pale persicaria, is a plant of the family Polygonaceae. It is considered to be native throughout most of the world, from arctic to tropical realms, except South America and Southern Africa. It is closely related to Persicaria maculosa and as such is considered a weed in Britain and Europe. Other common names for the plant include pale smartweed, curlytop knotweed, and willow weed. It is a species complex made up of a great many varying forms, sometimes considered varieties. The environment also has a strong influence on the morphology of an individual plant.
Sonchus asper, the prickly sow-thistle, rough milk thistle, spiny sowthistle, sharp-fringed sow thistle, or spiny-leaved sow thistle, is a widespread flowering plant in the tribe Cichorieae within the family Asteraceae.
Crinum latifolium is a herbaceous perennial flowering plant in the amaryllis family (Amaryllidaceae). It arises from an underground bulb. The flowering stems are stout, reaching about 2 m in height. The leaves are long, linear and ligulate. The flowers are white and arranged in an umbel. It grows naturally in Asia, from India and Sri Lanka through much of mainland Southeast Asia to south China. It is also reportedly naturalized in the West Indies and in the Chagos Archipelago.
Arabis hirsuta, known as hairy rock-cress, is a flowering plant in the family Brassicaceae. In previous North American works, this species has been broadly defined to include plants native to Europe, Asia, and the northern half of North America, but is now more often restricted to a narrower subgroup restricted to Europe.
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.
Erechtites is a genus of flowering plants in the daisy family known commonly as fireweeds or burnweeds. They are native to the Americas and Australia, but some species are widely distributed weeds.
Hypochaeris glabra is a species of flowering plant in the tribe Cichorieae within the family Asteraceae known by the common name smooth cat's ear. It is native to Europe, North Africa, and the Middle East but it can be found on other continents where it is an introduced species and a widespread weed. It has become widespread in Africa, southern and southeastern Asia, Australia, and parts of the Americas.
Rubus parvifolius, called Japanese bramble, or Australian raspberry in the United States or native raspberry in Australia is a species of plant in the rose family. It is a scrambling shrub native to eastern Asia and Australia. It has also become naturalized in a few scattered locations in the United States.
Ionactis linariifolia also known as the flax-leaf ankle-aster, flaxleaf whitetop or simply aster is a North American species of plants in the family Asteraceae.
Persicaria cespitosa, known as tufted knotweed, is a summer annual weedy plant of the family Polygonaceae, native to eastern Asia, from China to Japan and Southeast Asia, and introduced into North America. The plant grows to 3.5 feet (105 cm) in height with elliptic to lanceolate leaves, usually 20–75 mm long. It has small pink or red flowers arranged in tight terminal spikes.
Pentanema salicinum is a plant species in the family Asteraceae. It is found across Eurasia from Portugal to Japan. It has been reported growing in the wild in a few scattered locations in North America but it has not become widely established there.
Engelmannia peristenia, called Engelmann daisy or cutleaf daisy, is a North American species of flowering plants in the family Asteraceae. It is native to the south-central United States, primarily from Texas, New Mexico, Oklahoma, and southeastern Colorado, but with more isolated populations in Arizona, Louisiana, Arkansas, Missouri, Nebraska, and South Dakota.
Chromolaena squalida is a South American species of flowering shrub in the family Asteraceae. It is found in Brazil, Paraguay, Bolivia, Peru, Colombia, Venezuela, Guyana, Suriname.
Erechtites valerianifolius, common name tropical burnweed is a New World species of plants in the sunflower family. It is native to Mexico, Central America, South America, and the West Indies. It is also naturalized as a weed in much of the tropical Old World.
Erechtites glomeratus, common name New Zealand fireweed, or cutleaf burnweed, or fireweed or Cluster-headed fireweed, is a species of plant in the sunflower family. It is native to Australia and New Zealand, and also naturalized on the Pacific Coast of the United States.
Iva angustifolia is a species of flowering plant in the family Asteraceae known by the common name narrowleaf marsh elder. It grows in the south-central and southeastern United States.
