Rhinanthus


Also found in: Medical, Wikipedia.

Rhinanthus

 

(rattle), a genus of hemiparasitic plants of the family Scrophulariaceae. The plants are annual herbs with green, opposite, and usually serrate leaves. The flowers are mostly yellow and in spicate racemes; the corolla is two-lipped. The fruit, a laterally compressed capsule, has numerous winged (sometimes wingless) discoid seeds that rattle softly when the plant is shaken.

The approximately 50 species are found in the temperate and, to some degree, frigid zones of the northern hemisphere. The USSR has about 25 species, which grow mainly on wet meadows. R. vernalis (formerly R. major) and R. minor grow predominantly in forest and forest-steppe zones in wet meadows, along forest edges and the shores of bodies of water, and sometimes in fields. Both species, as well as many other species of Rhinanthus, parasitize the roots of meadow grasses and lower the yield and quality of hay. The plants are poisonous, since they contain the alkaloid rhinanthin. R. apterus, which is found predominantly in the forest zone of the European part of Western Siberia, is a weed of plantings of winter grains, mainly rye and wheat.

REFERENCE

Kott, S. A. Sornye rasteniia i bor’ba s nimi, 3rd ed. Moscow, 1961.

T. V. EGOROVA

References in periodicals archive ?
For example, restricted dispersal of Vaccinium myrtillus, Rhinanthus minor, Rumex acetosa, Cicerbita alpina, Trollius europaeus and Campanula thyrsoides appears to be the foremost reason for the patchy distribution, because seeds added manually to unoccupied sites resulted in successful germination (Lindgren et al, 2007; Frei et al.
Where grasses are outcompeting with flowers, introduce a semi-parasitic plant such as Rhinanthus minor, known as yellow rattle, which reduces the vigour of grassland plantings.
The latest addition to the meadow, seen for the first time last year, is the Yellow Rattle, Rhinanthus minor, that is one of the true indicators of a successful wild flower meadow.