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Schimper, Karl Friedric

(Encyclopedia)Schimper, Karl Friedric shĭmˈpər [key], 1803–67, German botanist. He did important work in plant morphology and originated the theory, called phyllotaxis, that there is a fixed order to the arran...

Dolan, Timothy Michael

(Encyclopedia)Dolan, Timothy Michael, 1950–, American Roman Catholic cardinal, b. St. Louis, Mo. Educated at Cardinal Glennon College, the Pontifical American College in Rome, and the Catholic University of Ameri...

Fernald, Merritt Lyndon

(Encyclopedia)Fernald, Merritt Lyndon fûrˈnəld [key], 1873–1950, American botanist, b. Orono, Maine, grad. Harvard, 1897. He taught at Harvard (1902–49) and was director of the Gray Herbarium there from 1937...

pokeweed

(Encyclopedia)pokeweed or pokeberry, tall, bushy perennial herb (Phytolacca americana) native to North America but cultivated and naturalized in Europe. The long clusters of white flowers are followed by purplish b...

Howard, Leland Ossian

(Encyclopedia)Howard, Leland Ossian, 1857–1950, American entomologist, b. Rockford, Ill., grad. Cornell (B.S., 1877), Ph.D. Georgetown Univ., 1896. Associated with the U.S. Bureau of Entomology from 1878 (as its ...

winterberry

(Encyclopedia)winterberry, name for two species of shrubs or small trees of the genus Ilex of the family Aquifoliaceae (holly family), native to the eastern half of North America. Both are deciduous but have winter...

black gum

(Encyclopedia)black gum, ornamental deciduous tree (Nyssa sylvatica family Nyssaceae) native to E North America. The leaves turn bright scarlet in the fall. The very tough wood was used for wheel hubs and other pur...

bladderwort

(Encyclopedia)bladderwort blădˈərwûrtˌ, –wôrtˌ [key], any plant of the genus Utricularia, insectivorous or carnivorous aquatic plants, many native to North America. Small animals are caught and digested in...

Ordovician period

(Encyclopedia)Ordovician period ôrdəvĭshˈən [key] [from the Ordovices, ancient tribe of N Wales], second period of the Paleozoic era of geologic time (see Geologic Timescale, tablegeologic timescale, table) fr...

Chickasaw

(Encyclopedia)Chickasaw chĭkˈəsô [key], Native North Americans whose language belongs to the Muskogean branch of the Hokan-Siouan linguistic stock (see Native American languages). They occupied N Mississippi an...