. The algae. Algae. i88 THE ALGAE months or more). Their form is determined by nutrient supply, bacterial growth, temperature, etc., leading to presence or absence of sex organs, extreme branching or very compact branching. The ova are normally fertilized in the sea, and though occasionally a single ovum may be fertiUzed whilst still in the oogonium, this can only be regarded as an abnormality. EcKLONiACEAE: EckloTiia (after Ecklon). Fig. 107 This is a southern hemisphere genus. There is a short, soUd un- branched stipe which is attached to the rocks by means of the usual rhizoids. In the youn
. The algae. Algae. i88 THE ALGAE months or more). Their form is determined by nutrient supply, bacterial growth, temperature, etc., leading to presence or absence of sex organs, extreme branching or very compact branching. The ova are normally fertilized in the sea, and though occasionally a single ovum may be fertiUzed whilst still in the oogonium, this can only be regarded as an abnormality. EcKLONiACEAE: EckloTiia (after Ecklon). Fig. 107 This is a southern hemisphere genus. There is a short, soUd un- branched stipe which is attached to the rocks by means of the usual rhizoids. In the young plant the stipe expands into a flatenned. Fig. 107 Ecklonia radiatay young, juvenile and adult plants ( x J). (After Bergquist.) frond which is initially dentate. Later the terminal portion disap- pears and the basal portion produces numerous lateral outgrowths (sporophylls). In its internal morphology the structure is compar- able to that described for Laminaria. Alariaceae: Alaria (ala, wing). Fig. 108 This genus is widely distributed throughout the northern hemi- sphere, the common species being A. esculenta. There is a short,. 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 Chapman, V. J. (Valentine Jackson), 1910-. London, Macmillan; New York, St. Martin's Press
Size: 1496px × 1670px
Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bo, bookcentury1900, bookcollectionbiodiversity, booksubjectalgae
