Definition

Noun 1. A cultivated rhubarb plant: Rheum cultorum is the botanical name for a specific, long-cultivated hybrid of rhubarb, derived from Rheum palmatum. It is primarily grown for its edible, fleshy leaf stalks (petioles).

Usage Notes

• This term is highly specific and technical. It is almost exclusively used in botanical, horticultural, and agricultural contexts to refer to the plant species itself.
• In everyday language, people refer to the edible parts of this plant simply as "rhubarb." The botanical name would not be used in cooking or general conversation.

Examples

• Botanical Context:
  • The garden's perennial bed features several varieties of Rheum cultorum.
  • For a successful harvest, Rheum cultorum requires a period of winter chill.

Advanced Usage

• The term can be used in scientific writing to distinguish this common culinary rhubarb from other, non-cultivated or ornamental species within the genus.

Variants and Related Words

• Rhubarb (n): The common name for the edible stalks of and related plants.
  • Rhubarb pie is a classic dessert.
• Rheum (n): The genus name encompassing all rhubarb plants.
• Rheum palmatum (n): A species of rhubarb, one of the parent plants from which was hybridized.

Synonyms

• Garden rhubarb
• Culinary rhubarb
• Pieplant (informal, chiefly US)

Key Distinction

• Rheum cultorum refers to the living plant.
• Rhubarb refers to the culinary product (the harvested stalks) from that plant.

Noun

1. long cultivated hybrid of Rheum palmatum; stems often cooked in pies or as sauce or preserves