. Botany for agricultural students. Plants. Fig. 168. — Lengthwise section through a vascular bundle of Corn, the knife sphtting the bundle as shown by the hne (o) in Figure 167, thus missing the pitted vessels, x, xylem showing spiral vessel (/i) and annular vessels (a) which have been so torn by the growth of the stem that only the rings are left; p, phloem consisting of sieve vessels (e) and companion cells (c); s, strengthening tissue. Highly FiQ. 169. — Vascular elements common among Ferns and Seed Plants, a, spiral vessel; h, annular vessel; c, pitted vessel; d, reticulated v
. Botany for agricultural students. Plants. Fig. 168. — Lengthwise section through a vascular bundle of Corn, the knife sphtting the bundle as shown by the hne (o) in Figure 167, thus missing the pitted vessels, x, xylem showing spiral vessel (/i) and annular vessels (a) which have been so torn by the growth of the stem that only the rings are left; p, phloem consisting of sieve vessels (e) and companion cells (c); s, strengthening tissue. Highly FiQ. 169. — Vascular elements common among Ferns and Seed Plants, a, spiral vessel; h, annular vessel; c, pitted vessel; d, reticulated vessel; e, sca- lariform vessel; /, elements of the phloem showing sieve vessel with sieve plate (/*), and companion cell (c). Highly magnified, a and h, after Bonnier and Leclerc Du Sablon; c, after De Bary; d, modified from Barnes; e, modi- fied from Cowles; and/, 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 Martin, John N. (John Nathan), b. 1875. New York, John Wiley ; London, Chapman & Hall
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectplants, bookyear1919
