Polemonium, commonly called Jacob's ladders or Jacob's-ladders, is a genus of between 25 and 40 species of flowering plants in the family Polemoniaceae, native to cool temperate to arctic regions of the Northern Hemisphere. One species also occurs in the southern Andes in South America. Many of the species grow at high altitudes, in mountainous areas. Most of the uncertainty in the number of species relates to those in Eurasia, many of which have been synonymized with Polemonium caeruleum.
Hydrocotyle umbellata is an aquatic plant that thrives in wet, sandy habitat. Its English common name is manyflower marshpennywort or dollarweed. It is native to North America and parts of South America. In Brazil it is known as acariçoba and has applications in herbal medicine with purported anxiolytic, analgesic and anti-inflammatory properties. It can also be found growing as an introduced species and sometimes a noxious weed on other continents. It is an edible weed that can be used in salads or as a pot herb.
Oxybasis rubra, common names red goosefoot or coastblite goosefoot, is a member of the genus Oxybasis, a segregate of Chenopodium. It is native to North America and Eurasia. It is an annual plant.
Ammannia robusta is a species of flowering plant in the loosestrife family known by the common name grand redstem. It is widespread across much of North America with additional populations in southeastern Brazil.
Lobelia kalmii is a species of flowering plant with a distribution primarily across Canada and the northern United States in temperate and boreal regions. It was formerly known as Lobelia strictiflora (Rydb.) It is commonly known as Kalm's lobelia, Ontario lobelia and Brook lobelia.
Tradescantia occidentalis, the prairie spiderwort or western spiderwort, is a plant in the dayflower family, Commelinaceae. It is common and widespread across the western Great Plains of the United States, as well as in Arizona, New Mexico, southern Utah, and Sonora, but is listed as a threatened species in Canada.
Arctophila is a genus of Arctic and Subarctic plants in the grass family. The only known species is Arctophila fulva, commonly known as pendant grass, native to northern parts of Eurasia and North America.
Limosella acaulis is a species of flowering plant in the figwort family known by the common name Owyhee mudwort. It is native to western North America from the Pacific Northwest to northern Mexico, where it grows in many types of muddy habitat next to water, such as pond edges. It is a fleshy annual herb forming low mats in muddy substrate. The flattened leaves are linear to strap-shaped to spoon-shaped and up to 6 centimeters long. The inflorescence is an erect stalk bearing one white to pale lavender flower just a few millimeters wide. The fruit is a capsule up to 5 millimeters wide containing many tiny seeds.
Wolffia columbiana, the Columbian watermeal, is a perennial aquatic plant in the subfamily Lemnoideae. This plant is distributed widely throughout North, Central, and South America, and also occurs in Curaçao.
Agrostis perennans, the upland bentgrass, upland bent, or autumn bent, is a species of flowering plant in the grass family, Poaceae.
Alisma subcordatum, the American water plantain, is a perennial aquatic plant in the water-plantain family (Alismataceae). This plant grows to about 3 feet in height with lance to oval shaped leaves rising from bulbous corms with fibrous roots. Any leaves that form underwater are weak and quick to rot; they rarely remain on adult plants. A branched inflorescence with white to pink 3-petaled flowers blooms from June to September. The seeds are eaten by waterfowl and upland birds. Native Americans dried and ate the submerged rootlike structures. The species name subcordatum means "almost heart-shaped".
Alisma triviale, the northern water plantain, is a perennial semi-aquatic or aquatic plant in the water-plantain family (Alismataceae).
Wolffia borealis is a species of flowering plant known by the common name northern watermeal. It is native to North America including sections of Canada and the United States. It grows in mats on the surface of calm water bodies, such as ponds. It is a very tiny plant with no leaves, stems, or roots. The green part is up to 1.2 millimeters long with one rounded end and one pointed end. On the flattened top of the plant is a single stamen and pistil. Like other Wolffia, it is edible and makes a nutritious food.
Asclepias exaltata is a species of flowering plant in the dogbane family, native to eastern North America.
Najas gracillima, the slender waternymph, is a submerged species of aquatic plant in the Hydrocharitaceae family. found in lakes and streams. It is native to China, Russian Far East, Japan, Korea, Taiwan, Iran, Alberta, Ontario, Newfoundland, Nova Scotia, New Brunswick, the eastern United States. It is also considered introduced and naturalized in France, Spain, Italy and California.
Isoetes tuckermanii, or Tuckerman's quillwort, is a tetraploid species of plant in the family Isoetaceae. It can be found in shallow water in Newfoundland, Nova Scotia, New Brunswick, and south through the New England states to Maryland. It bears 10 to 45 long bright green to yellow green leaves that are 4 to 25 centimeters long, usually erect, but sometimes recurved. The velum covers one fourth or less of the sporangium, which is usually unspotted, 5 millimeters long, and 3 millimeters wide. The white spherical megaspores are 400 to 650 micrometers in diameter, and bear rough-crested ridges that form a hexagonal honeycomb shape. The kidney shaped microspores are 24 to 33 micrometers long, bearing tubercles. It is very similar to I. macrospora, only reliably distinguishable by cytology or through careful megaspore measurement.
Xyris difformis, the bog yelloweyed grass, is a North American species of flowering plant in the yellow-eyed-grass family. It is native to the eastern and southern United States, eastern and central Canada, and Central America.
Epilobium coloratum, known by the common names purpleleaf willowherb and cinnamon willow-herb, is a species of flowering plant in the genus Epilobium of the willowherb family Onagraceae. This species is native to the Midwest and Eastern United States, as well as the Canadian provinces of Ontario, Québec, New Brunswick, Nova Scotia, and Newfoundland. It is also native to the Dominican Republic and Haiti.
Juncus militaris, the bayonet rush, is a species of flowering plant in the family Juncaceae, native to eastern Canada and the eastern United States. A perennial, it is found in shallow lakes and slow-moving rivers, on a variety of substrates; sand, silt, and muck.
Juncus pelocarpus, the brown-fruit rush, is a species of flowering plant in the family Juncaceae, native to British Columbia and eastern Canada, and the north-central and eastern United States. A colonial perennial 1 to 12 in tall, it is found in wet areas.
Flower
Pinnately divided leaf
