dicotyledonae

Thân thiện

A student examines a dicotyledonae leaf under a magnifying glass.

Definition

1. Noun:
   • A major class of flowering plants: "Dicotyledonae" refers to a large group of seed-producing plants whose embryos typically have two seed leaves (cotyledons). The leaves usually have a network of veins. This class includes many familiar plants like roses, oaks, and sunflowers.

Usage

• The term "Dicotyledonae" is a scientific, taxonomic name used in botany. It is often used in formal classifications, academic texts, and discussions about plant biology.
• Example: Botanists study the evolution of flowering plants within the class .

Examples

• Noun:
  • The Dicotyledonae are characterized by their two embryonic leaves.
  • Many common trees and garden flowers belong to the Dicotyledonae.

Advanced Usage

• In modern botanical classification, the group "Dicotyledonae" is often referred to as "dicots" (an informal term) or is recognized as not being a single, monophyletic group. The traditional subclasses mentioned (Magnoliidae, Hamamelidae, etc.) are now often treated as separate evolutionary lineages.
  • Recent phylogenetic studies have led to the reclassification of many plants formerly placed in the Dicotyledonae.

Variants and Related Words

• Dicotyledon (n): Another term for a plant belonging to the Dicotyledonae; a dicot.
  • A bean seed is a classic example of a dicotyledon.
• Dicot (n, informal): A common abbreviated form of "dicotyledon."
  • Broadleaf plants are typically dicots.

Synonyms

• Dicotyledons: The plural form, often used interchangeably with "Dicotyledonae" to refer to the group.
• Magnoliopsida: An alternative class name sometimes used in taxonomic systems for this broad group of plants.

Notes on Meaning

• The primary meaning is taxonomic, referring to a specific class of plants. The reference definition divides it into six subclasses (Magnoliidae, Hamamelidae, Caryophyllidae, Dilleniidae, Rosidae, Asteridae), which represent different evolutionary grades from primitive to more advanced forms.

Học thuật

Noun

1. comprising seed plants that produce an embryo with paired cotyledons and net-veined leaves; divided into six (not always well distinguished) subclasses (or superorders): Magnoliidae and Hamamelidae (considered primitive); Caryophyllidae (an early and distinctive offshoot); and three more or less advanced groups: Dilleniidae; Rosidae; Asteridae

Từ đồng nghĩa

• Dicotyledones
• class Dicotyledones
• Dicotyledonae
• class Dicotyledonae
• Magnoliopsida
• class Magnoliopsida