Cyperus

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Cyperus

 

(galingale), a genus of perennial and, less commonly, biennial and annual herbs of the family Cyperaceae (sedge). The bisexual flowers have no perianth and are in flattened linear spikelets under two-ranked scales. The spikelets are gathered in a common umbel or head; there are long bracteal leaves at the base of the inflorescence. The fruit—an achene—is usually three-angled.

There are about 500 species, distributed in tropical, subtropical, and—rarely—temperate zones. The USSR has 14 species, which grow predominantly in the south in damp and marshy places. The species C. fuscus is widely distributed in the USSR. C. rotundus, which grows in the Caucasus and Middle Asia, is a long-rhizomed pernicious weed of cotton and other irrigated crops; the tuberous formations on its rhizomes are used as spice. The chufa (C. esculentus) is sometimes cultivated for food and animal feed. The rhizome of C. longus contains a violet-scented essential oil that is used in Western Europe in the production of perfumes and cosmetics. A particularly well-known species is the papyrus (C. papyrus). The umbrella plant (C. alternifolius) is a common houseplant and greenhouse plant.

T. V. EGOROVA

References in periodicals archive ?
The tubers of Cyperus rotundus were ground to coarse powder separately and stored at room temperature.
Brachiaria reptans, Cyperus rotundus, Chenopodium murale, Euphorbia hirta, Convolvulus arvensis, Oxalis corniculata, Polygonum plebejum, Tribulus terrestris, Trianthema spp.
Investigation of extracts from (Tunisian) Cyperus rotundus as anti-mutagens and radical scavengers.
Cyperus rotundus suppresses AGE formation and protein oxidation in a model of fructose-mediated protein glycoxidation.
Basado en lo anterior, el presente trabajo plantea la evaluacion del efecto bioherbicida de extractos de Macrophyllafurcraea Baker (fique), Cyperus rotundus L (coquito), Sorghum bicolor L (sorgo) y Ruta graveolens L (ruda) sobre la germinacion de las semillas del cilantro Coriandrum sativum L y de las malezas Bidens pilosa L (papunga) y Amaranthus dubius Mart (bledo).
ARGENTINA, Tucuman: San Miguel de Tucuman, VIII-1982, Cyperus rotundus, Frias y Moran col.
As populacoes de plantas daninhas encontradas na comunidade infestante foram Amaranthus viridis, Bidens pilosa, Brachiaria plantaginea, Coronopus didymus, Cyperus rotundus, Digitaria nuda, Eleusine indica, Galinsoga parviflora, Lepidium virginicum, Nicandra physaloides, Oxalis latifolia, Parthenium hysterophorus, Portulaca oleracea, Solanum americanum e Synedrellopsis grisebachii.
Symrise's extensive efficacy tests showed that plants with powerful antiirritant properties included witch hazel, as well as Lonicera japonica (Extrapone honeysuckle flower), Pueraria lobata (Extrapone pueraria root), Sophora japonica (Extrapone sophora flower) and Cyperus rotundus (Extrapone nutgrass root).