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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 28

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25. cavities, walls with pits which appear oval in form and mark the entire surface. The [underlined] Spiral vessels [/underlined] are next to these. Those nearest to the oval-pitted vessels having the spirals most closely coiled. There is only [underlined] one [/underlined] spiral in a vessel. The [underlined] wood-parenchyma [/underlined] cells come next to these gain, and are oblong cells with square ends: they have cellulose walls and retain their protoplasmic contents. I next cut a transverse
 
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