释义 |
shrubs
shrubs- boscage - A mass of growing trees or shrubs—or a depiction of a wooded landscape.
- nature strip - An area of grass beside a roadway, possibly with a few trees or shrubs, lying between the footpath part and the roadway proper.
- balm, balsam - Greek balsamon is the source of both balm and balsam; it was an oily resin of various trees and shrubs.
- topiary - Describing shrubs and trees that are trimmed, it is derived from Latin topiarius, "ornamental gardener."
Shrubs
Shrubs perennial woody plants that branch near the ground (in contrast to trees) and have no main trunk in the adult stage. A shrub is one of the principal plant forms. Only young plants have a main trunk; eventually other branches the same size or larger than the trunk arise from underground or aboveground dormant buds at the base of the maternal and subsequent shoots. Shrubs have a life-span of 10–20 years (rarely, 40–50 years) and a height of 0.8–6.0 m. They are distributed in all vegetation zones but are most varied in dry, continental conditions and in subtropical and subalpine mountain zones. In forests of the temperate zone, shrubs usually form the undergrowth. During the evolution of the plant world, many shrubs probably arose from trees as a result of adaptation to such unfavorable conditions as drought and low temperature, giving rise in turn to subshrubs and perennial herbaceous plants. MedicalSeeshrub |