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| form of a diploid plant in the alternation of generations that produces asexual spores |
| plants with the vascular tissues xylem and phloem for transporting water and nutrients |
| allelopathy (ə-lē-lŏp'ə-thē, āl'ə-) Pronunciation Key
The inhibition of growth in one plant species by chemicals produced by another. For example, other plants will often not grow underneath black walnut trees, since these trees produce juglone, a chemical inhibiting plant respiration. |