draba

Thân thiện

A small draba blooms with tiny yellow flowers on a rocky slope.

Definition

Noun: 1. A low-growing cushion-forming plant of the genus Draba: Any of numerous small, often alpine or arctic, herbaceous plants belonging to the genus Draba within the mustard family (Brassicaceae). They are characterized by forming tight cushions or rosettes of leaves.

Detailed Characteristics

• Growth Form: Typically a low-growing, tufted, or cushion-forming perennial.
• Leaves: Form a basal rosette; leaves are often hairy.
• Flowers: Small, usually white or yellow, with four petals, borne in a terminal raceme (an unbranched flower cluster where flowers open from the bottom upwards).
• Stem: The flowering stem can be scapose (leafless) or leafy.
• Fruit: Produces a dehiscent silique (a slender, two-parted seed capsule) that is oblong or linear in shape. The fruit splits open when ripe to release seeds.

Examples of Usage

• General Reference:
  • The rocky alpine meadow was dotted with tiny, yellow-flowered draba.
  • Botanists study draba species to understand plant adaptation to harsh environments.
• Scientific/Identification Context:
  • The key characteristic distinguishing this species is its scapose stem and linear draba silique.

Advanced Usage

• In Botanical Classification: The term is used specifically to refer to members of the genus , one of the largest genera in the Brassicaceae family. Discussions may involve specific species like (yellow whitlowgrass) or (spring draba).
  • The research paper focused on the phylogenetic relationships within the genus Draba.

Variants and Related Words

• Whitlow-grass / Whitlowgrass: A common name for several species, particularly .
• Draba verna (n.): A specific annual species, also called spring draba or shadflower.
• Brassicaceae (n.): The mustard family, to which draba belongs.
• Silique (n.): The type of seed capsule characteristic of draba and other mustard family plants.

Synonyms

• Whitlow-grass (common name for some species)
• Cushion plant (descriptive term for its growth form, though this applies to many genera)

Notes

• There are no specific idioms or phrasal verbs associated with the botanical term "draba." It is a technical noun used primarily in botanical, horticultural, and ecological contexts.

Học thuật

Noun

1. any of numerous low-growing cushion-forming plants of the genus Draba having rosette-forming leaves and terminal racemes of small flowers with scapose or leafy stems; fruit is a dehiscent oblong or linear silique