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The sun flower as a type of flowering plants by Anne B. Jewett, 1890

The Sun Flower as a Type of Flowering Plants by Anne B. Jewett, 1890, Page 41

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38. [underlined] periblem.[/underlined] i.i. are the primary mother-cells, the origin of the periblem and plerome. [underlined] Hair [/underlined] or [underlined] Trichrome [/underlined] is the term employed in the higher plants to describe those outgrowths which arise only from the epidermis. The hairs may originate from the primary meristem of the [underlined] punctum vegetationis, [/underlined], or from young leaves and lateral shoots, if an external layer of cells has
 
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