. Botany for high schools and colleges. Botany. 98 BOTANY. (6) One-celled simple liairs may be obtained from the vegetative organs of species of CEiiotliera and Srassica and many grasses—, species of Panicum—and from the seeds of the cotton plant; the last constitute the " cotton" of commerce. (c) Many-celled simple hairs occur on the filaments of Tradescantia, on leaves of the Primrose, Ageratwm, Erigeron Canadenae, pumpkin, and very many others. (d) Branched one-celled hairs occur in Capsella, Draha, Baymbryv/m, Alyamm, and many other Oruciferm. {e) Branched many-celled hairs m
. Botany for high schools and colleges. Botany. 98 BOTANY. (6) One-celled simple liairs may be obtained from the vegetative organs of species of CEiiotliera and Srassica and many grasses—, species of Panicum—and from the seeds of the cotton plant; the last constitute the " cotton" of commerce. (c) Many-celled simple hairs occur on the filaments of Tradescantia, on leaves of the Primrose, Ageratwm, Erigeron Canadenae, pumpkin, and very many others. (d) Branched one-celled hairs occur in Capsella, Draha, Baymbryv/m, Alyamm, and many other Oruciferm. {e) Branched many-celled hairs may be found on the Mullein and Fig. 88.—Hairs from Thistle (Onims alHssimus). A, young hair from the stem before it has been drawn out; 2), an older hair more highly magnified, after its ex- tremity has been drawn out into a thread-like lash ; C, nair with a long lash from the underside of a full-grown leaf. Highly magniied.—After Beal. (/) Clustered or tufted hairs are found on many MaXvaeem, and the nearly related scales or peltate hairs on Sheplierdia. (g) Root-hairs are best obtained for study by growing seeds of mustard, radish, wheat, etc., on damp cotton or blotting-paper, and then mak- ing careful longitudinal sections of the terminal portion of the root at the place where the hairs are just appearing (usually several millimetres above the tip of the root). By making preparations in this way all stages of the development of these hairs may be studied in the same specimen. (h) Glandular hairs are found in many groups of plants ; they may be studied in Petunia, Verbena, Primula, Ma/rtynia, and the, tomato. (j) Apparently related to glandular hairs are the curious hairs from. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Bessey, Charles E. (Charles Edwin), 1845-1915. New York : H. Holt
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectbotany, bookyear1888
