Definition

Noun: 1. A taxonomic category of plants: "Genus Rhus" is the scientific name for a group of flowering plants in the cashew family, Anacardiaceae. This genus traditionally included many species commonly known as sumacs. Modern botanical classification often limits Rhus to nonpoisonous species, separating the poisonous ones (like poison ivy and poison oak) into the genus Toxicodendron.

Usage Examples

• Noun:
  • The botanist identified the shrub as a member of genus Rhus.
  • Several species in genus Rhus, such as staghorn sumac, are prized for their brilliant fall foliage.
  • The dried fruits of some Rhus species are used to make a tangy spice.

Advanced Usage

• In Botanical Nomenclature: The name is always italicized, and the genus name () is capitalized. It is used as a formal, precise label in scientific contexts.
  • The study focused on the evolutionary history of Rhus and its relatives.

Variants and Related Words

• Rhus (n): The abbreviated, common form used to refer to the genus in botanical and horticultural contexts.
  • This garden features several varieties of Rhus.
• Sumac (n): The common name for many plants within genus .
  • The sumac along the path is turning a beautiful red.

Synonyms

• Sumac genus: A descriptive, non-scientific synonym.

Notes on Meaning

• Historical vs. Modern Classification: It is important to note that the scope of "genus Rhus" has changed. Historically, it contained both poisonous and nonpoisonous sumacs. In contemporary taxonomy, it is typically restricted to nonpoisonous species. The poisonous varieties are now classified under the distinct genus .

Noun

1. deciduous or evergreen shrubs and shrubby trees of temperate and subtropical North America, South Africa, eastern Asia and northeastern Australia; usually limited to nonpoisonous sumacs (see genus Toxicodendron)