【英语时差8,16】景天(在线收听) |
生词: wilt (使)枯萎, (使)衰弱, (使)畏缩
succulent ['sʌkjulənt] 多汁的; 肉质的
tissue ['tisju:] 薄的织物, 薄纱
drought [draut] 干旱(季节), 旱灾
mat 席子;垫子
concrete ['kɔnkri:t] 固结成的; 混凝土制的
distinctive [dis'tiŋktiv] 明显不同的, 特别的, 突出的
coherence [kəʊ'hɪərəns] 黏合性;连贯性
Hot dry weather is a challenge for gardeners, who long for plants that don’t wilt in high summer. Plants that conserve water, often have thick fleshy leaves and are called succulents. They store water in their tissues. Hairiness on leaves, and also silver colored leaves, are also signs that plants are drought tolerant. One of the best groups of plants to investigate if you are planning a drought tolerant garden, are the sedums.
The genus is made up of at least 250 species, so you can find them in all sizes. Many of the low growing, mat-forming varieties are suitable for rock gardens or for edging beds near concrete sidewalks or driveways where the soil heats up and dries out.
Some of the taller varieties, such as “Autumn Joy,” “Ruby Glow,” “Matrona,” and “Vera Jameson” have attractive foliage as well as distinctive flower heads. They look well in clumps in the garden all through the growing season. They are easily divided so that you can repeat them in various places in your garden to provide coherence.
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