Stem succulent, simple or divaricately branched from middle, lower nodes swollen, naked.
茎肉质的，单或中间的分枝，下部节膨胀，裸露。
| 单词 | Stem succulent |
| 释义 |
Stem succulent
英语例句库
Stem succulent, simple or divaricately branched from middle, lower nodes swollen, naked. 茎肉质的，单或中间的分枝，下部节膨胀，裸露。
英语百科
Stem succulentStem succulents are fleshy succulent columnar shaped plants which conduct photosynthesis mainly through stems not leaves. They are related by form, but not by evolution. They evolved to have similar forms and physiological characteristics by convergent evolution. Examples are tall thin Euphorbias from deserts and arid regions southern African and Madagascar, similarly shaped cacti from North America and South America, which occupy a similar evolutionary niche, and members of two genera of the family Asclepiadaceae (Hoodia and Stapelia). Shared features are a succulent stem that stores water and conducts photosynthesis, protective spines or thorns, no leaves (or highly reduced leaves), and use of CAM photosynthetisis (an opening of stomata and fixing CO2 almost exclusively at night). |
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