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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...

horsetail

(Encyclopedia)horsetail, any plant of the genus Equisetum [Lat.,=horse bristle], the single surviving genus of a large group (Equisetophyta) of primitive vascular plants. Like the ferns and club mosses, relatives o...

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 ...

conifer

(Encyclopedia)conifer kŏnˈĭfûr [key] [Lat.,=cone-bearing], tree or shrub of the order Coniferales, e.g., the pine, monkey-puzzle tree, cypress, and sequoia. Most conifers bear cones and most are evergreens, tho...

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...

hyperbola

(Encyclopedia)CE5 Hyperbola hyperbola hīpûrˈbələ [key], plane curve consisting of all points such that the difference between the distances from any point on the curve to two fixed points (foci) is the sam...

Unimak

(Encyclopedia)Unimak o͞oˈnĭmăk, yo͞oˈ– [key], volcanic island, 70 mi (113 km) long, off W Alaska. It is the largest of the Aleutian Islands, and nearest to the Alaska Peninsula. The highly symmetrical, cone...

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. ...

Barrington, George

(Encyclopedia)Barrington, George bârˈĭngtən [key], 1755–c.1804, notorious English pickpocket, b. Ireland. His family name was Waldron. Arriving in London in 1773, he became a professional pickpocket and, obta...