. Plant life and plant uses; an elementary textbook, a foundation for the study of agriculture, domestic science or college botany. Botany. ALGJE. 371 D. The Groups of Alga. — The algae are divided into four groups. The first two are mainly fresh-water forms; the others are mainly salt-water or marine forms. (1) Cyanophycea. — The word means blue alga. They are so called because a blue pigment (color- ing matter) occurs along with the green chlorophyll. Oscil- latoria, No sloe, and Rivularia belong to this group. (2) Chlorophycece. — The word means green alga. Most of the common fresh- water a
. Plant life and plant uses; an elementary textbook, a foundation for the study of agriculture, domestic science or college botany. Botany. ALGJE. 371 D. The Groups of Alga. — The algae are divided into four groups. The first two are mainly fresh-water forms; the others are mainly salt-water or marine forms. (1) Cyanophycea. — The word means blue alga. They are so called because a blue pigment (color- ing matter) occurs along with the green chlorophyll. Oscil- latoria, No sloe, and Rivularia belong to this group. (2) Chlorophycece. — The word means green alga. Most of the common fresh- water algae belong to this group, and forms like certain members of this group are thought to be the remote Fig. — Spirogyra. ancestors of the Fig. 169. — Spirogyra. Por- Portion of a young y.:„ 1 1 tions of adjacent filaments filament showing the ° " ' showing the sex process large spiral chloro- (3) PhcBOphyceOS. as described in the con- plast. _ The word means text. brown alga. Although chlorophyll is present, other pig- ments which are brown and yellow obscure it and deter- mine the color of the plant. These plants are abundant along all seacoasts. They grow anchored by holdfasts. 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 Coulter, John G. (John Gaylord), b. 1876. New York, American Book Co
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectbotany, bookyear1913
