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ground ivy

(Encyclopedia) ground ivy, trailing perennial herb of the genus Glechoma of the family Labiatae (mint family), closely related to catnip and naturalized from Europe. It forms a dense ground cover and…

Bermuda grass

(Encyclopedia) Bermuda grass, perennial pasture, lawn, and hay grass (Cynodon dactylon) of the family Poaceae (grass family), native to Africa and Asia and now common in warm regions of both…

cattail

(Encyclopedia) cattail or reed mace, any plant of the genus Typha, perennial herbs found in almost all open marshes. The cattail (also called club rush) has long narrow leaves, sometimes used for…

horehound

(Encyclopedia) horehound, aromatic Old World perennial herb (Marrubium vulgare) of the family Labiatae (mint family), naturalized in North America. It has woolly white foliage and tiny white…

quack grass

(Encyclopedia) quack grass or couch grass, Old World perennial grass (Agropyron repens), now widely distributed and in the United States a troublesome weed. It somewhat resembles a beardless wheat…

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…

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…

coltsfoot

(Encyclopedia) coltsfoot, Eurasian perennial herb (Tussilago farfara) of the family Asteraceae (aster family), now a widespread weed in most northern lands. The scaly flower stalk bears a yellow…

gaillardia

(Encyclopedia) gaillardiagaillardiagālärˈdēə [key], any plant of the genus Gaillardia of the Asteaceae family (aster family), including annual, biennial, and perennial herbs with showy heads of red…