(Encyclopedia) winter cress or upland cress, species of Barbarea, herbs of the family Cruciferae (or Brassicaceae; mustard family). The pungent leaves of several species have been used for salads or…
(Encyclopedia) Wood, Robert Williams, 1868–1955, American physicist, b. Concord, Mass., grad. Harvard (B.A., 1891). After studying abroad he became associated with Johns Hopkins as professor of…
(Encyclopedia) biennial, plant requiring two years to complete its life cycle, as distinguished from an annual or a perennial. In the first year a biennial usually produces a rosette of leaves (e.g…
(Encyclopedia) brodiea or brodiaeabrodiaeaboth: brədēˈə [key], any plant of the genus Brodiaea, herbs of the family Liliaceae (lily family), with narrow leaves and blue or purple star-shaped flowers…
(Encyclopedia) ragweed, any plant of the genus Ambrosia, coarse, weedy herbs belonging to the family Asteraceae (aster family), most of which are native to America. They have inconspicuous greenish…
(Encyclopedia) San MarcosSan Marcossăn märˈkəs [key]. 1 City (1990 pop. 38,974), San Diego co., S Calif., a northern suburb of San Diego; settled 1880s, inc. 1963. Citrus fruit, avocados, flowers,…
(Encyclopedia) sepal, a modified leaf, part of the outermost of the four groups of flower parts. The sepals of a flower are collectively called the calyx and act as a protective covering of the inner…
(Encyclopedia) privetprivetprĭvˈĭt [key], any plant of the genus Ligustrum, Old World shrubs or small trees of the family Oleaceae (olive family), some of which are common as hedge plants. Privet…
From the U.S. Census Bureau Find fun facts about Valentine's Day—a holiday centuries old that celebrates love—from who sent the first valentine to how many Americans send love messages today…
Continent: East AsiaClimate: Varies dramatically, from cold and dry in the north to steamy in the south School: Most schools in China run from about 7:30 a.m. to 5:00 p.m., including a two-hour…
