Per Axel Rydberg was a Swedish-born, American botanist who was the first curator of the New York Botanical Garden Herbarium.
Artemisia alaskana, the Alaskan sagebrush or Alaskan wormwood or Siberian wormwood, is a North American species of plants in the sunflower family. It is found in British Columbia, the Yukon, the Northwest Territories, and Alaska. Some authors have considered it as a subspecies as the Russian species A. kruhsiana.
Astragalus lentiginosus is a species of legume native to western North America where it grows in a range of habitats. Common names include spotted locoweed and freckled milkvetch. There are a great number of wild varieties. The flower and the fruit of an individual plant are generally needed to identify the specific variety.
Antennaria umbrinella is a North American species of flowering plants in the family Asteraceae known by the common names umber pussytoes and brown pussytoes. It is native to southwestern Canada and the western United States as far south as Colorado, Coconino County in Arizona, and Tulare County in California). It grows in a variety of habitats at a variety of elevations, from lowland sagebrush steppe to subalpine meadows.
Madieae is a tribe of flowering plants in the family Asteraceae. It is sometimes considered a subtribe of Heliantheae. Notable species include the tarweeds of the Western United States as well as the silverswords of Hawaii.
Boeberastrum is a genus of flowering plants in the family Asteraceae.
Leucactinia is a genus of flowering plants in the tribe Tageteae within the family Asteraceae.
Gymnolaena is a genus of Mexican flowering plants in the family Asteraceae.
Oreochrysum is a genus of flowering plants in the family Asteraceae.
Pseudoclappia, the false clapdaisies, is a genus of North American shrubs in the tribe Tageteae within the family Asteraceae.
Pseudobahia heermannii is a species of flowering plant in the family Asteraceae known by the common names foothill sunburst and brittlestem.
Antennaria microphylla is a stoloniferous perennial forb in the family Asteraceae. It is widespread across northern and western North America, from Alaska and the three Canadian Arctic territories east to Quebec and south to Minnesota, New Mexico, and California.
Euphrosyne dealbata, commonly known as copperweed or woolly marsh elder, is a species of plant in the family Asteraceae. It is found in western North America where it is native to northern Mexico, and the south-western United States.
Psathyrotopsis is a genus of North American plants in the tribe Bahieae within the family Asteraceae.
Amauriopsis is a genus of North American plants in the Spanish needles tribe within the daisy family. The plants grow in Mexico and the western United States.
Amauriopsis dissecta is a North American species of flowering plants in the daisy family known by the common names yellow ragweed and ragleaf bahia. It is native to the western United States as far north as the Black Hills of South Dakota and Wyoming, as well as in northern Mexico.
Erigeron arenarioides is a species of flowering plant in the family Asteraceae known by the common names sand fleabane and Wasatch fleabane. It has been found only in the northern part of the state of Utah in the western United States.
Helenium pinnatifidum is a North American perennial plant in the sunflower family, commonly known as southeastern sneezeweed. It is found in the southeaster United States.
Hymenothrix wrightii is a North American species of flowering plant in the daisy family. It grows in northwestern Mexico and the southwestern United States.
Hymenoxys quinquesquamata is a North American species of flowering plant in the family Asteraceae known by the common names rincon rubberweed or rincon bitterweed. It has been found only in the states of Arizona and New Mexico in the southwestern United States. Many of the populations lie in the Huachuca Mountains of Cochise County in Arizona.
