Physocarpus, commonly called ninebark, is a genus of flowering plants in the family Rosaceae, native to North America and northeastern Asia.
Per Axel Rydberg was a Swedish-born, American botanist who was the first curator of the New York Botanical Garden Herbarium.
Helianthella, the little sunflower, is a genus of North American plants in the family Asteraceae.
Perityle is a genus of flowering plants in the daisy family. They are known generally as rock daisies.
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.
Boeberastrum is a genus of flowering plants in the family Asteraceae.
Gymnolaena is a genus of Mexican flowering plants in the family Asteraceae.
Platyschkuhria is a genus of North American flowering plants in the daisy family.
Pseudobahia is a genus of California plants in the tribe Madieae within the family Asteraceae. These plants are known generally as sunbursts.
Pseudoclappia, the false clapdaisies, is a genus of North American shrubs in the tribe Tageteae within the family Asteraceae.
Chamaechaenactis, common name fullstem, is a genus of flowering plants in the daisy family.
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.
Centromadia parryi, the pappose tarweed, is a species of plant in the tribe Madieae within the family Asteraceae. It is found in North America where it is native to California and, northern Baja California.
Chaetopappa parryi, called the Parry's lazy daisy, or Parry's leastdaisy, is a North American species of plants in the family Asteraceae. It is native to northeastern Mexico and to the Big Bend region of western Texas.
Ericameria obovata, or Rydberg's goldenbush, is a North American species of flowering shrubs in the family Asteraceae. It has been found only in the state of Utah in the western United States.
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.
Heterotheca barbata, the Spokane false goldenaster, is a very rare North American species of flowering plant in the family Asteraceae. It has been found only in the northwestern United States, in eastern Washington and northern Idaho.
Symphoricarpos parishii, or Parish's snowberry, is a North American species of flowering plant in the honeysuckle family. It had been found in California, Nevada, Arizona, and Baja California.
