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San Francisco–Oakland Bay Bridge

(Encyclopedia)San Francisco–Oakland Bay Bridge, double-decked structure, W Calif.; built 1933–36 and (eastern section replacement) 2002–13. It has a total length of 8.25 mi (13.2 km). From San Francisco it cr...

Darwin, Sir Francis

(Encyclopedia)Darwin, Sir Francis, 1848–1925, English botanist, assistant to his father, Charles Robert Darwin. He lectured in botany at Cambridge and was foreign secretary of the Royal Society and president of t...

Eichler, August Wilhelm

(Encyclopedia)Eichler, August Wilhelm ouˈgo͝ost vĭlˈhĕlm īkhˈlər [key], 1839–87, German botanist. He worked out the symmetry of the parts of a flower and developed a system of plant classification which, ...

Henslow, John Stevens

(Encyclopedia)Henslow, John Stevens hĕnzˈlō [key], 1796–1861, English botanist. He was professor of mineralogy (1822–27) and of botany (1827–61) at Cambridge. Henslow was a teacher and friend of Charles Da...

cortex

(Encyclopedia)cortex, in botany, term generally applied to the outer soft tissues of the leaves, stems, and roots of plants. Cortical cells of the leaves and outer layers of nonwoody stems contain chloroplasts, and...

Barton, Benjamin Smith

(Encyclopedia)Barton, Benjamin Smith, 1766–1815, American physician and botanist, b. Lancaster, Pa., studied at the College of Philadelphia, at Edinburgh, and at Göttingen (M.D., 1789). He taught at the College ...

Pfeffer, Wilhelm

(Encyclopedia)Pfeffer, Wilhelm vĭlˈhĕlm pfĕˈfər [key], 1845–1920, German plant physiologist. He was professor of botany successively at the universities of Bonn, Basel, Tübingen, and Leipzig (from 1887). W...

pith

(Encyclopedia)pith, in botany, core of the stem of most plants. Pith is composed of large, loosely packed food-storage cells. As the stem grows older the pith usually dries out, and in some it disintegrates and the...

Notre Dame, University of

(Encyclopedia)Notre Dame, University of nōˈtər dām, nōˈtrə [key], at Notre Dame, Ind., near South Bend; Roman Catholic; coeducational; est. and opened 1842, chartered 1844. It has a noted law school and comp...

Warming, Johannes Eugenius Bülow

(Encyclopedia)Warming, Johannes Eugenius Bülow yōhänˈəs ĕo͝ogāˈnēo͝os büˈlou värmˈĭng [key], 1841–1924, Danish botanist, a founder of the science of plant ecology. He was a professor at the Univ. ...