Crossword clues for helianthus
The Collaborative International Dictionary
helianthus \helianthus\ n. any plant of the genus Helianthus having large flower heads with dark disk florets and showy yellow rays.
Syn: sunflower.
Wiktionary
n. Any plant, of the genus ''Helianthus'', having large flower heads with dark disk florets and showy yellow rays; the sunflowers
WordNet
n. any plant of the genus Helianthus having large flower heads with dark disk florets and showy yellow rays [syn: sunflower]
Wikipedia
Helianthus or sunflowers (from the , Hēlios, "sun" and , anthos, "flower") L. is a genus of plants comprising about 70 species in the family Asteraceae. The genus is one of many in the Asteraceae that are known as sunflowers. Except for three species in South America, all Helianthus species are native to North America. The common name, "sunflower," typically refers to the popular annual species Helianthus annuus, the common sunflower, which round flower heads in combination with the ligules look like the sun. This and other species, notably Jerusalem artichoke (H. tuberosus), are cultivated in temperate regions as food crops and ornamental plants.
The domesticated sunflower, H. annuus, is the most familiar species. Perennial sunflower species are not as popular for gardens due to their tendency to spread rapidly and become invasive. Whorled sunflowers, H. verticillatus, were listed as an endangered species in 2014 when the U.S. Fish and Wildlife Service issued a final rule protecting it under the Endangered Species Act. The primary threats are industrial forestry and pine plantations in Alabama, Georgia, and Tennessee. They grow to and are primarily found in woodlands, adjacent to creeks and moist, prairie-like areas.
Usage examples of "helianthus".
Erysimum pumilum, Gynerium argenteum, Helianthus orygalis, Lactuca sonchifolia, Lilium auratum, Lobelia cardinalis, Onosma taurica, Origanum pulchellum, Phlox, Physalis Alkekengi, Polygonum Brunonis, P.
Brassica oleracea, circumnutation of the radicle, of the arched hypocotyl whilst still buried beneath the ground, whilst rising above the ground and straightening itself, and when erect--Circumnutation of the cotyledons--Rate of movement--Analogous observations on various organs in species of Githago, Gossypium, Oxalis, Tropaeolum, Citrus, Aesculus, of several Leguminous and Cucurbitaceous genera, Opuntia, Helianthus, Primula, Cyclamen, Stapelia, Cerinthe, Nolana, Solanum, Beta, Ricinus, Quercus, Corylus, Pinus, Cycas, Canna, Allium, Asparagus, Phalaris, Zea, Avena, Nephrodium, and Selaginella.
Brassica oleracea, circumnutation of the radicle, of the arched hypocotyl whilst still buried beneath the ground, whilst rising above the ground and straightening itself, and when erect--Circumnutation of the cotyledons--Rate of movement--Analogous observations on various organs in species of Githago, Gossypium, Oxalis, Tropaeolum, Citrus, Aesculus, of several Leguminous and Cucurbitaceous genera, Opuntia, Helianthus, Primula, Cyclamen, Stapelia, Cerinthe, Nolana, Solanum, Beta, Ricinus, Quercus, Corylus, Pinus, Cycas, Canna, Allium, Asparagus, Phalaris, Zea, Avena, Nephrodium, and Selaginella.
Gillenia trifoliata, Gynerium argenteum, Harpalium rigidum, Helianthus multiflorus, Hesperis matronalis flore-pleno, Heuchera, H.
Erysimum pumilum, Gynerium argenteum, Helianthus orygalis, Lactuca sonchifolia, Lilium auratum, Lobelia cardinalis, Onosma taurica, Origanum pulchellum, Phlox, Physalis Alkekengi, Polygonum Brunonis, P.
Helianthus annuus: circumnutation of hypocotyl, with filament fixed across its summit, traced on a horizontal glass in darkness, from 8.
Seeds of Helianthus annuus and of two species of Ipomoea (those of 'I.