Butomus umbellatus is a Eurasian plant species in the family Butomaceae. It is the only species in the family. Common names include flowering rush or grass rush. Introduced into North America as an ornamental plant it has now become a serious invasive weed in the Great Lakes area and in parts of the Pacific Northwest. In Israel, one of its native countries, it is an endangered species due to the habitat loss. It can also be found in Great Britain locally, for example at the Caldicot and Wentloog Levels The plant is a rhizomatous, hairless, perennial aquatic plant. Its name is derived from Greek bous, meaning "cow", "ox" etc. and tome, a cut, which refers to the plant's swordlike leaves.
Melanthieae is a tribe of flowering plants within the family Melanthiaceae. Molecular phylogenetic studies in the 21st century have resulted in a large-scale reassignment of many of its species to different genera; in particular the genus Zigadenus (deathcamases) has been restricted to a single species, Zigadenus glaberrimus. Plants contain alkaloids, making them unpalatable to grazing animals; many are very poisonous to both animals and humans.
Persicaria pensylvanica is a species of flowering plant in the buckwheat family, Polygonaceae. It is native to parts of North America, where it is widespread in Canada and the United States. It has also been noted as an introduced species in parts of Europe and South America. Common names include Pennsylvania smartweed and pinkweed.
Maianthemum racemosum, the treacleberry, feathery false lily of the valley, false Solomon's seal, Solomon's plume or false spikenard, is a species of flowering plant native to North America. It is a common, widespread plant with numerous common names and synonyms, known from every US state except Hawaii, and from every Canadian province and territory, as well as from Mexico.
Prunus pensylvanica, also known as bird cherry, fire cherry, pin cherry, and red cherry, is a North American cherry species in the genus Prunus.
Stellaria graminea is a species of flowering plant in the family Caryophyllaceae known by the common names common starwort, grass-leaved stitchwort, lesser stitchwort and grass-like starwort.
Parietaria is a genus of flowering plants in the family Urticaceae, native to temperate and tropical regions across the world.
Dudleya multicaulis is a succulent plant known by the common name manystem liveforever or many-stemmed dudleya. This Dudleya is endemic to southern California, where it is rare and seriously threatened as its habitat is altered by humans. Many occurrences of this species have been extirpated. This species is characterized by a few short, fingerlike cylindrical leaves with pointed tips, and its erect peduncle, which is topped with a branching inflorescence bearing up to 15 flowers on each long, thin branch. The flowers, which appear in late spring, have pointed yellow petals and long stamens. It is usually found on heavy clay or rocky soils and outcrops.
Echinops sphaerocephalus, known by the common names glandular globe-thistle, great globe-thistle or pale globe-thistle, is a Eurasian species of globe-thistle belonging to the tribe Cardueae within the family Asteraceae.
Maianthemum stellatum is a species of flowering plant, native across North America. It has been found in northern Mexico, every Canadian province and territory except Nunavut, and from every US state except Hawaii and the states of the Southeast. It has little white buds in the spring, followed by delicate starry flowers, then green-and-black striped berries, and finally deep red berries in the fall.
Parietaria debilis, commonly known as pellitory, small-flower pellitory, or native pellitory, is a herb native to Australia and New Zealand.
Carex pensylvanica is a species of flowering plant in the sedge family commonly called Pennsylvania sedge. Other common names include early sedge, common oak sedge, and yellow sedge.
Sphenopholis is a genus of North American and Hawaiian plants in the grass family.
Potamogeton foliosus is a species of aquatic plant known by the common name leafy pondweed. It is native to nearly all of North America and parts of Central America, where it grows in water bodies such as ponds, lakes, ditches, and slow-moving streams. It has been reported from every state in the United States except Hawaii as well as from every Canadian province and territory except Newfoundland and Nunavut.
Potentilla pensylvanica is a species of cinquefoil known by the common names Pennsylvania cinquefoil and prairie cinquefoil and in the language Shoshoni, it goes by the name Ku'-si-wañ-go-gǐp. It is native to much of northern and western North America, including most of Canada and the western half of the United States. P. pensylvanica grows in many types of habitat. The plant is quite variable in appearance. It may be small and tuftlike or slender and erect. The leaves are divided into a few leaflets which are deeply lobed and have hairy undersides. The inflorescence is a cluster of several flowers, each with five yellow petals a few millimeters in length. The flower is 3 to 5 mm wide. P. pensylvanica grows in elevations between elevations 2700 to 3800 meters.
Spergularia canadensis is a species of flowering plant in the family Caryophyllaceae, known by the common name Canadian sandspurry. It is native to North America, where it is known from mainly coastal habitat. It is found along the coastline of Canada and northern parts of the United States, from Alaska to northern California on the West Coast, and as far south as New York on the East Coast.
Stellaria longifolia is a species of flowering plant in the family Caryophyllaceae known by the common name longleaf starwort. It is native to much of the northern half of the Northern Hemisphere, occurring throughout northern Europe and North America. It grows in many types of moist habitat, including meadows, marshes, and roadsides. It is a rhizomatous perennial herb forming clumps with sprawling, branching stems which are mostly hairless except for tiny rough hairs along the edges of the squarish stem. The linear to lance-shaped leaves are up to 3.5 centimeters long and are oppositely arranged in pairs. The inflorescence bears several flowers, each on a short pedicel. The flower has five pointed green sepals each a few millimeters long. There are five white petals, each so deeply lobed it appears to be two.
Stellaria nitens is a species of flowering plant in the family Caryophyllaceae known by the common names shiny chickweed and shining starwort. It is native to western North America, including British Columbia, Alberta, and the western United States, its distribution extending into Mexico at least as far as Baja California. It grows in many types of habitat, in dry and moist areas, and sometimes in disturbed places. It is an annual herb producing a slender, upright, four-angled stem from a thin taproot, reaching up to about 25 centimeters in height. Most of the leaves are located low on the stem, each measuring up to 1.5 centimeters long, with smaller, narrower leaves occurring above. The leaves are hairless except for some rough hairs along the margins, and the blades have shiny surfaces. The inflorescence bears a few flowers on short pedicels. The flower has five pointed sepals each a few millimeters long. There are sometimes five tiny white petals as well, though these are often absent.
Parietaria floridana, common name Florida pellitory, is a plant species native to the southeastern United States, the West Indies, and much of Latin America. In the US, the heart of its range extends from Florida, to Georgia and North and South Carolina, with isolated populations reported in Mississippi, Louisiana, Texas, New Hampshire, Kentucky and Delaware. Some populations in California have in the past been referred to as P. floridana but are now regarded as a separate species, P. hespera.
Gamochaeta pensylvanica, the Pennsylvania cudweed or Pennsylvania everlasting, is a widespread species of flowering plant in the family Asteraceae. It is native to South America and introduced into Eurasia, Africa, Australia, and North America. The pensylvanica epithet is a misnomer, as the plant is not native to Pennsylvania and only marginally naturalized there.
Detail of inflorescence
