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Ottumwa

(Encyclopedia)Ottumwa ŏtŭmˈwə, ō– [key], city (1990 pop. 24,488), seat of Wapello co., SE Iowa, on both banks of the Des Moines River, in a farm and coal area; inc. 1851. A commercial and industrial center, ...

figwort

(Encyclopedia)CE5 Figwort, Scrophularia lanceolata figwort, common name for some members of the Scrophulariaceae, a family comprising chiefly herbs and small shrubs and distributed widely over all continents. T...

herbicide

(Encyclopedia)herbicide hrˈbəsīdˌ [key], chemical compound that kills plants or inhibits their normal growth. A herbicide in a particular formulation and application can be described as selective or nonselectiv...

flower

(Encyclopedia)CE5 Longitudinal cross section of a flower at the time of fertilization, showing a pollen grain and a pollen tube. flower, name for the specialized part of a plant containing the reproductive orga...

pigmentation

(Encyclopedia)pigmentation, name for the coloring matter found in certain plant and animal cells and for the color produced thereby. Pigmentation occurs in nearly all living organisms. Almost all plants synthesize ...

Doctrine of Signatures

(Encyclopedia)Doctrine of Signatures, the concept that the key to humanity's use of various plants was indicated by the form of the plant. The red sap of the bloodroot (Sanguinaria canadensis), for instance, was be...

Daubenton, Louis Jean Marie

(Encyclopedia)Daubenton, Louis Jean Marie lwē zhäN märēˈ dōbäNtôNˈ [key], 1716–1800, French naturalist. He was a professor at the Collège de France from 1778; his work touched many fields—comparative ...

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...

Aizuwakamatsu

(Encyclopedia)Aizuwakamatsu īˈzo͞owäkämätˈso͞o [key], city, Fukushima prefecture, N Honshu, Japan. It has a large semiconductor plant and continues to produce many traditional p...

Grand Prairie

(Encyclopedia)Grand Prairie, city (2020 pop. 196,100), Dallas and Tarrant counties, N Tex., halfway between Dallas and Fort Worth; inc. 1909. Located in a highly urba...