Definition

Noun 1. A taxonomic subclass of plants: One of four subclasses or superorders within the monocotyledons (Monocotyledones). It comprises a large group of mostly terrestrial herbaceous plants, often found in moist habitats. This subclass is characterized by specific floral and morphological features and includes several economically and ecologically significant families.

Examples of Usage

• Noun:
  • The subclass Commelinidae includes families like the grasses (Poaceae) and sedges (Cyperaceae).
  • Botanists study the evolutionary relationships within the subclass Commelinidae.
  • Many plants in the subclass Commelinidae have flowers with distinct, often reduced, perianths.

Advanced Usage

• Taxonomic Context: The term "subclass Commelinidae" is used almost exclusively in formal botanical classification and scientific literature. It represents a specific clade (a group of organisms believed to have evolved from a common ancestor) within the flowering plants.
  • The phylogenetic analysis confirmed the placement of the family Bromeliaceae within the subclass Commelinidae.

Variants and Related Words

• Commelinid (adj): Pertaining to or characteristic of the subclass Commelinidae.
  • The commelinid clade is a major group of monocots.
• Monocotyledones / Monocots (n): The larger class of flowering plants to which the Commelinidae belong, characterized by having a single seed leaf (cotyledon).
• Commelinales, Poales, Zingiberales, Arecales (n): Examples of plant orders that are classified within the subclass Commelinidae.

Synonyms

• Commelinid clade: A more modern, phylogenetic term often used synonymously with the taxonomic rank "subclass Commelinidae" to refer to this evolutionary group.

Notes on Different Meanings

• The term "subclass Commelinidae" has a single, precise meaning in scientific (botanical) English. It does not have common, everyday meanings or usages outside of taxonomic classification.

Noun

1. one of four subclasses or superorders of Monocotyledones; comprises about 19,000 species in 25 families of mostly terrestrial herbs especially of moist places including: Cyperaceae; Gramineae; Bromeliaceae; and Zingiberaceae