An arboretum is a botanical collection composed exclusively of trees of a variety of species. Originally mostly created as a section in a larger garden or park for specimens of mostly non-local species, many modern arboreta are in botanical gardens as living collections of woody plants and is intended at least in part for scientific study.
The Morris Arboretum & Gardens of the University of Pennsylvania is the official arboretum of the Commonwealth of Pennsylvania. The Arboretum is open daily except for major holidays. It is located at 100 East Northwestern Avenue, Chestnut Hill, Philadelphia, Pennsylvania.
Euonymus alatus, known variously as winged spindle, winged euonymus, or burning bush, is a species of flowering plant in the family Celastraceae, native to central and northern China, Japan, and Korea.
Elmer Drew Merrill was an American botanist and taxonomist. He spent more than twenty years in the Philippines where he became a recognized authority on the flora of the Asia-Pacific region. Through the course of his career he authored nearly 500 publications, described approximately 3,000 new plant species, and amassed over one million herbarium specimens. In addition to his scientific work he was an accomplished administrator, college dean, university professor and editor of scientific journals.
Platanthera blephariglottis, commonly known as the white fringed orchid or white-fringed orchis, is a species of orchid of the genus Platanthera. It is considered to be an endangered species in Connecticut and Ohio, a threatened species in Florida, Maryland and Rhode Island, exploitably vulnerable in New York, and susceptible to be threatened in Québec.
Erigeron annuus, the annual fleabane, daisy fleabane, or eastern daisy fleabane, is a species of herbaceous, annual or biennial flowering plant in the family Asteraceae.
Sisyrinchium angustifolium, commonly known as narrow-leaf blue-eyed-grass, is a herbaceous perennial growing from rhizomes, native to moist meadow and open woodland. It is the most common blue-eyed grass of the eastern United States, and is also cultivated as an ornamental.
Viola rostrata, commonly called the long-spurred violet, is an herbaceous plant in the violet family (Violaceae). It is native to eastern North America, where it is found in Canada and the United States, primarily in the Northeastern, Midwestern, and Appalachian regions. Its natural habitat is acidic mesic forests, often growing near Tsuga canadensis.
Agrostis canina, the velvety bentgrass, brown bent or velvet bent, is a species of grass in the family Poaceae.
Agalinis paupercula, commonly known as the smallflower false foxglove, is a hemiparasitic annual plant native to the eastern parts of the United States and Canada. Found in open, moist areas, its purple flowers are borne on a 30-to-70-centimeter stem, and bloom in August and September. The species has often been treated as a variety of Agalinis purpurea, the purple false foxglove, and preliminary genetic evidence suggests that the two are, in fact, a single species.
Sanicula odorata, commonly called the clustered blacksnakeroot, is a flowering plant in the family Apiaceae. It is native and widespread in eastern North America. It grows in nutrient-rich woods, often in mesic forests and bottomlands. It is able to tolerate somewhat degraded habitats, and is not considered a particularly conservative species.
Sandra Diane Knapp is an American-born botanist. She is a merit researcher of the Plants Division of the Natural History Museum, London and from 2018 was the president of the Linnean Society of London. While working at the Natural History Museum, London she has overseen the Flora Mesoamericana inventory of Central American plants. She has published several books on botanical subjects as well as a significant number of scientific articles. In 2016 she was awarded the Linnean Medal. In 2022 she was elected as a Fellow of the Royal Society. In 2023 she was appointed an Officer of the Order of the British Empire (OBE) and was awarded the Engler Medal in Gold by the International Association for Plant Taxonomy.
Ida Augusta Keller was an American plant physiologist and teacher in Philadelphia.
Mildred Esther Mathias was an American botanist and professor.
Carex schweinitzii, common name Schweinitz's sedge, is a Carex species native to North America. It is a perennial.
Poa cuspidata, commonly called early bluegrass, is a species of flowering plant in the grass family (Poaceae). It is native to the eastern United States, where its range extends from Appalachian regions into the Coastal Plain, where it is less common. In the Appalachian mountains, it is a common species found in forest openings.
Proserpinaca palustris, the marsh mermaidweed or common mermaid-weed, is a species of flowering plant in the watermilfoil family (Haloragaceae). It is found in North America, the Caribbean, and Central America.
Glyceria canadensis is a species of grass in the genus Glyceria which is known by the common name rattlesnake mannagrass. It is native to North America, from British Columbia to Newfoundland and south to North Carolina. It is commonly found in wet areas.
Carex baileyi is a sedge in section Vesicariae the genus Carex native to the Appalachian mountains in Eastern North America. It is commonly called Bailey's sedge. Carex baileyi was named in honor of Liberty Hyde Bailey by its discoverer, Nathaniel_Lord_Britton.
