Rhus


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Rhus

 

(sumac), a genus of deciduous and evergreen plants of the family Anacardiaceae. The plants include trees, shrubs, and, less frequently, woody lianas. The monoecious or dioecious plants range in height from 0.5 to 12 m; some individuals reach 20 m in height. The alternate leaves are simple, ternate, or odd-pinnate. The numerous small flowers are unisexual or bisexual and gathered in inflorescences. There are five petals and five sepals. The fruit is a small drupe.

There are about 60 sumac species (according to other data, 250), distributed mainly in North America, Southwest and East Asia, Africa, and Europe. One species, R. coriaria, is found in the USSR, growing on arid rocky slopes of the lower and middle mountain zones in the Crimea, the Caucasus, the western Kopetdag, and the Pamirs. The species yields valuable tanning and dyeing agents. Many other sumac species are used as tanning, medicinal, or ornamental plants. A well-known species is staghorn sumac (R. typhina).

A number of species contain a poisonous juice that causes severe, painful burns; the juice is used in the preparation of highquality lacquers. Most of these species are classified in the separate genus Toxicodendron. The best-known are the East Asian T. verniciferum, which is the source of Japan wax, and T. vernix. In Japan a wax is obtained from the fruits of T. succedaneum.

T. G. LEONOVA

References in periodicals archive ?
Samples of galls were collected from leaf rachises of Rhus hypoleuca on the Mountain Qixing in Shangrao County, Jiangxi Province, China in 2009.
[6.] Kamiya Y, Miyakoshi T Synthesis of urushiol components and analysis of urushiol sap from Rhus vernicifera.
En Cajamarca, la densidad de RHUS encontrada fue de 13,2 por 10 000 habitantes, que esta muy por debajo del minimo senalado por la OPS.
Jang et al., "Selective cytotoxic effects on human cancer cell lines of phenolic-rich ethyl-acetate fraction from Rhus verniciflua stokes," American Journal of Chinese Medicine, vol.
Many studies have indicated the growth inhibitory effects of Rhus verniciflua Stokes against numerous cancer cells.
No studies have evaluated the effectiveness of oral steroids for Rhus dermatitis.
Rhus coriaria was found to possess fatty acids such as malic acid, linoleic acid, azelaic acid, tetradecanoic acid, 7- hexadecenoic acid, ethyl octadecenoate, palmitic acid, oleic acid, elaidic acid, stearic acid, 11,13-eicosadienoic acid, 11-eicosenoic acid, arachidic acid, behenic acid, and tetracosanoic acid.
In retrospect to the above, the objectives of the study were: (1) to tag Mineral-Referred sites (MRS) influencing Mineral-Density variation (FMDVAR) among Grewa, Rhus, Boabab and Jackfruit accessions; (2) to apply a nutrametric value (grading) test to classifying FMD variation within the realm of nutraceutical food, nutrition and health promise.
In the following case, we first gave the patient Rhus tox, with no beneficial therapeutic effect, then prescribed Mangifera (mango).
PALABRAS CLAVE / Anacardiaceae / Lobadium I Neartico / Rhus / Styphonia / Terebinthifolia / Zona de Transicion Mexicana /
Rhus do have a tendency to suckering, so you need to remove rooted suckers in autumn.
The observed increase in stem emergence over time for all species combined was strongly influenced by the clonal stem production of Rhus typhina, hereafter referred to as Rhus only; ([ILLUSTRATION FOR FIGURE 1 OMITTED], Table 1).