. The algae. Algae. Fig. 103 Lessonia. A, adult plants of L. flavicans. B, C, sporeling stages in L. nigrescetis. (After Oltmanns.) although, of course, there is no connexion. The stipe of L. flavicans is extremely stout and rigid, 5-10 ft. long and sometimes as thick as a human thigh, the additional growth being due to a deeper seated secondary cortical meristem. It appears to be more or less regularly branched in a dichotomous fashion, a feature which is brought about by the lamina being sUt down successively to the intercalary growing region, each successive segment developing into a new la
. The algae. Algae. Fig. 103 Lessonia. A, adult plants of L. flavicans. B, C, sporeling stages in L. nigrescetis. (After Oltmanns.) although, of course, there is no connexion. The stipe of L. flavicans is extremely stout and rigid, 5-10 ft. long and sometimes as thick as a human thigh, the additional growth being due to a deeper seated secondary cortical meristem. It appears to be more or less regularly branched in a dichotomous fashion, a feature which is brought about by the lamina being sUt down successively to the intercalary growing region, each successive segment developing into a new lamina with its own portion of stipe. Dried parts of the stipe, which can easily be taken for pieces of driftwood, are used by natives to make knife handles. This method of causing splitting should be compared with the other processes found in Nereocystis, Macro- cystis and Postelsia (cf. below). Lessoniaceae : P(95^^/5/a (after A. Postels). Fig. 104 This is a monotypic genus, often known as the *sea palm', that is confined to the Pacific coast of North America where it grows between Vancouver Island and central CaHfornia on rocks which are exposed to heavy surf. The smooth, glossy, cylindrical stipe is thick but not very long, up to i m. in height. It is erect and hollow within and bears at its apex a number of short, soUd, dichotomously 183. 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
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Keywords: ., bo, bookcentury1900, bookcollectionbiodiversity, booksubjectalgae
