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Herkesin düzenleyebileceği ücretsiz türler dizini.

Animalia, Plantae, Fungi, Bacteria, Archaea, Protista ve diğer tüm yaşam biçimlerini kapsar.

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Vikitür'ü keşfedin

ZooKeys ile işbirliği

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Vikitür ile ZooKeys arasında bir işbirliği duyuruldu. PhytoKeys Kasım 2010'da da işbirliğine katıldı. ZooKeys ve PhytoKeys türlerinin görüntüleri Wikimedia Commons'a yüklenecek ve Vikitür'e kullanılacaktır.

Değerli yazar

Mary Agnes Chase Collecting Plants, Brazil, Image ID 96-548.tif

Mary Agnes Chase
1869–1963. Standard IPNI form: Chase

Mary Agnes Chase, née Merrill, was an American botanist who worked at the U.S. Department of Agriculture and the Smithsonian Institution. She is considered one of the world's outstanding agrostologists and is known for her work on the study of grasses, and also for her work as a suffragist. Chase was born in Iroquois County, Illinois and held no formal education beyond grammar school. That aside, she made significant contributions to the field of botany, authored over 70 scientific publications, and was conferred with an honorary doctorate in science from the University of Illinois. She specialized in the study of grasses and conducted extensive field work in North- as well as and South America. Her Smithsonian Field Books collection from 1897 to 1959 is archived in the Smithsonian Institution Archives.

In 1901, Chase became a botanical assistant at the Field Museum of Natural History under Charles Frederick Millspaugh, where her work was featured in two museum publications: Plantae Utowanae (1900) and Plantae Yucatanae (1904). Two years later, Chase joined the U.S. Department of Agriculture (USDA) as a botanical illustrator and eventually became a scientific assistant in systematic agrostology (1907), assistant botanist (1923), and associate botanist (1925), all under Albert Spear Hitchcock. Chase worked with Hitchcock for almost twenty years, collaborating closely and also publishing, for instance The North American Species of Panicum (1910).

Following Hitchcock's death in 1936, Chase succeeded him to become senior botanist in charge of systematic agrostology and custodian of the Section of Grasses, Division of Plants at the United States National Museum (USNM). Chase retired from the USDA in 1939, but continued her work as custodian of the USNM grass herbarium until her death in 1963. She was an Honorary Fellow of the Smithsonian Institution (1959) and Fellow of the Linnean Society of London (1961). Agnesia is named in her honour (a monotypic genus of herbaceous South American bamboo in the grass family).

Chase experienced discrimination based on her gender in the scientific field, for example, being excluded from expeditions to Panama in 1911 and 1912 because the expedition's benefactors feared the presence of women researchers would distract men. During World War I, Chase marched with Alice Paul and was jailed several times for her activities. In 1918, she was arrested at the Silent Sentinels rally picketing the White House; she refused bail and was held for 10 days, where she instigated a hunger-strike and was force-fed. The USDA accused her of "conduct unbecoming a government employee," but Hitchcock helped her keep her job. Chase was also an active member of the National Association for the Advancement of Colored People (NAACP).

See also: Distinguished authors of previous months.

Species of the month

Wrinkled Crust

Phlebia radiata. New York State, 2015.

Phlebia radiata Fries, E.M. 1821. XI Phlebia Fries. Systema mycologicum: sistens fungorum ordines, genera et species, huc usque cognitas, quas ad normam methodi naturalis determinavit 1: 427.

Some facts about this fungus:

Phlebia radiata, commonly known as the Wrinkled Crust, is a common species of crust fungus in the family Meruliaceae. It was first described scientifically in 1821 by Elias Magnus Fries. Phlebia radiata is widespread in the Northern Hemisphere. It is an inedible, xylophagous species and grows as a wrinkled, orange to pinkish waxy crust on the decaying wood of coniferous and deciduous trees, in which it causes a white rot. The fruitbody of Phlebia radiata is resupinate—flattened against its substrate like a crust. It is wrinkled, orange to pinkish in color, and has a waxy texture. It is circular to irregular in shape, reaching a diameter up to 10 cm (3.9 in), although neighbouring fruitbodies may be fused together to form larger complexes up to 30 cm (12 in) in diameter. The soft texture of the flesh hardens when the fruitbody becomes old. The spores are white. Microscopic examination reveals additional spore details: they are smooth, allantoid (sausage-shaped) to elliptical, and inamyloid, measuring 3.5–7 by 1–3 µm.

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