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podzol

(Encyclopedia) podzolpodzolpŏdˈsŏl [key] or podzolic soil, member of a group of soils that are gray in color, have an ashy appearance, and extend immediately south of the tundra regions of the…

self-heal

(Encyclopedia) self-heal or heal-all, weedy perennial (Prunella vulgaris) with the typical angular stems and bluish flowers of the family Labiatae (mint family). Although it probably originated in…

pampas grass

(Encyclopedia) pampas grass, any species of the genus Cortaderia, tall South American plants of the family Poaceae (grass family) cultivated in warm climates for ornament. The common pampas grass (C…

shepherd's-purse

(Encyclopedia) shepherd's-purse, annual herb (Capsella bursa-pastoris) of the family Cruciferae (or Brassicaceae; mustard family), indigenous to Europe but now a nearly cosmopolitan weed in temperate…

springtail

(Encyclopedia) springtail, common name for any of the minute, primitive six-legged arthropods of the order Collembola. The springtail is named for a springlike mechanism on the underside of the…

puffball

(Encyclopedia) puffball or smokeball, fungus in which the aboveground portion is typically a stemless brownish sac with an opening at the top through which issues the dustlike mass of ripe spores.…

Pyrenean shepherd

(Encyclopedia) Pyrenean shepherd or Berger des Pyrénées, breed of medium-sized herding dog that originated in the Pyrenees of S France; its name is often shortened to pyr shep. The breed comes in two…

rheumatism

(Encyclopedia) rheumatismrheumatismr&oomacr;ˈmətĭzəm [key], general term for a number of disorders that cause inflammation and pain in muscles, bones, joints, or nerves. In common usage arthritis…

rhizome

(Encyclopedia) rhizomerhizomerīˈzōm [key] or rootstock, fleshy, creeping underground stem by means of which certain plants propagate themselves. Buds that form at the joints produce new shoots. Thus…

hamster

(Encyclopedia) hamster, Old World rodent, related to the voles, lemmings, and New World mice. There are many hamster species, classified in several genera. All are solitary, burrowing, nocturnal…