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pond scum

(Encyclopedia)pond scum, accumulation of floating green algae on the surface of stagnant or slowly moving waters, such as ponds and reservoirs. One of the commonest forms is Spirogyra. ...

Wollemi pine

(Encyclopedia)Wollemi pine wŏlˈəmīˌ [key], primitive tree, Wollemia nobilis, of the conifer family Araucariaceae, named after Wollemi National Park in New South Wales, Australia, where it was discovered in 199...

algae

(Encyclopedia)algae ălˈjē [key] [plural of Lat. alga=seaweed], a large and diverse group of primarily aquatic plantlike organisms. These organisms were previously classified as a primitive subkingdom of the plan...

Bryophyta

(Encyclopedia)Bryophyta brīˈəfīˌtə, brīˌəfīˈtə [key], division of green land plants that includes the mosses (class Bryopsida), the liverworts (Marchantiopsida), and the hornworts (Anthocerotopsida). Th...

Tokorozawa

(Encyclopedia)Tokorozawa tōkōˌrōˈzäwä [key], city (1990 pop. 303,040), Saitama prefecture, central Honshu, Japan. It is a suburb of Tokyo and an agricultural market for locally grown green tea. It is the bas...

garnierite

(Encyclopedia)garnierite gärˈnēərītˌ [key], pale apple-green mineral, chemically a hydrous silicate of nickel and magnesium. An important ore of nickel, it is found in New Caledonia, Russia, and S Africa. In ...

Langlade, Charles Michel de

(Encyclopedia)Langlade, Charles Michel de shärl mēshĕlˈ də [key], 1729–1800, pioneer in present-day Wisconsin and soldier, b. Mackinac region, now in Mich.; son of a trader, Augustin Langlade, who establishe...

Chrysophyta

(Encyclopedia)Chrysophyta krəsŏfˈətə [key], phylum (division) of unicellular marine or freshwater organisms of the kingdom Protista consisting of the diatoms (class Bacillariophyceae), the golden, or golden-br...

hydra, in zoology

(Encyclopedia)hydra hīˈdrə [key], common name for freshwater organisms in the phylum Cnidaria, which includes jellyfish, sea anemones, and corals. Hydras are widely distributed in lakes, ponds, and sluggish stre...

Canyonlands National Park

(Encyclopedia)Canyonlands National Park, 337,598 acres (136,679 hectares), SE Utah; est. 1964. Located in a desert region, the park contains a maze of deep canyons and many unusual features carved by wind and water...