horseweed

• 指一种植物，即北美东部常见的直立多年生植物，叶缘有锯齿、叶尖锐尖，花为疏松的黄色圆锥花序；也指一种广泛归化的北美杂草，叶线形，头状花序小而呈盘状、花色偏黄。

A noun referring to a type of plant, specifically an erect perennial with serrate pointed leaves and a loose panicle of yellowish flowers native to the eastern United States, or a common North American weed with linear leaves and small discoid heads of yellowish flowers widely naturalized in temperate regions.

1. Erigeron canadensis (Canada fleabane)C1formalamerican

   An erect perennial plant with strong-scented, serrate pointed leaves and a loose panicle of yellowish flowers, native to the eastern United States.

   加拿大蓬

   • Horseweed is commonly found in disturbed areas across the eastern United States.
   • The plant's serrate leaves and yellowish flower panicles make it easy to identify.
   • Farmers often consider horseweed a troublesome weed in agricultural fields.

   同义词butterweedhogweed

2. Conyza canadensis (Canadian horseweed)C1formalamerican

   A common North American weed with linear leaves and small discoid heads of yellowish flowers, widely naturalized throughout temperate regions.

   小蓬草

   • Canadian horseweed has become naturalized in many temperate regions around the world.
   • The plant's small, discoid flower heads are a key identifying feature.
   • Horseweed is often found in fields, roadsides, and other disturbed habitats.

   同义词butterweed