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quassia

(Encyclopedia)quassia kwŏshˈə [key], name for several tropical trees and for a bitter extract from their bark. The extract containing complex terpenoid compounds called quassinoids is used medicinally as a bitte...

pickerelweed

(Encyclopedia)pickerelweed, common name for the Pontederiaceae, a family of chiefly tropical perennial aquatic herbs found in freshwater. The pickerelweeds (genus Pontederia) range north into temperate regions, inc...

pigweed

(Encyclopedia)pigweed, name for several weedy plants, particularly the common pigweed or lamb's-quarters of the family Chenopodiaceae (goosefoot family), the rough pigweed, or green amaranth, of the related family ...

oxeye

(Encyclopedia)oxeye, name for several plants, e.g., the oxeye daisy and black-eyed Susan, but particularly for two genera: Heliopsis, native to North America, and Buphthalmum, native to Europe and W Asia but cultiv...

edelweiss

(Encyclopedia)edelweiss āˈdəlvīs [key], perennial aster plant (genus Leontopodium) found at high altitudes in the mountains of Europe, Asia, and South America. It is about 6 in. (15.2 cm) tall with woolly-white...

custard-apple

(Encyclopedia)custard-apple, common name for members of the Annonaceae, a family of shrubs, woody vines, and small trees of the tropics. The custard-apples (Annona squamosa and A. reticulata) and other members of t...

chinquapin

(Encyclopedia)chinquapin chĭngˈkəpĭn [key] [Algonquian], name for certain American species of the chestnut genus of the family Fagaceae (beech family) and for a related species, the golden chinquapin (Castanops...

cohosh

(Encyclopedia)cohosh kōhŏshˈ [key], name for several plants, among them baneberry and black cohosh, a species of bugbane, both of the buttercup family; and blue cohosh, a member of the barberry family. Both fami...

chervil

(Encyclopedia)chervil chûrˈvəl [key], name for two similar edible Old World herbs of the family Umbelliferae (parsley family). The salad chervil is Anthriscus cerefolium. Its leaves, like those of the related di...

four-o'clock

(Encyclopedia)four-o'clock, common name for members of the Nyctaginaceae, a family of plants found in warm climates, especially in the Americas, chiefly as herbs but often in the tropics as shrubs or trees. Species...