. Botany for high schools. Botany. Fig. 335. Details of microspore and male prothallium of Selaginella; ist, microspore; 2d, wall removed to show small prothallial cell below; 3d. mature male prothallium still within the wall; 4th, small eel! below is the prothallial cell;the remainder is ant^heridium with wall and four sperm cells within; 5th, spermatozoid. (After Beliaieff and Pfetler.) strobilus. There is a single spore case at the base of each sporo- phyll. A few of the lower ones contain each a few very large spores, one to eight. These are called macros pores or mega- * The sporangia whi
. Botany for high schools. Botany. Fig. 335. Details of microspore and male prothallium of Selaginella; ist, microspore; 2d, wall removed to show small prothallial cell below; 3d. mature male prothallium still within the wall; 4th, small eel! below is the prothallial cell;the remainder is ant^heridium with wall and four sperm cells within; 5th, spermatozoid. (After Beliaieff and Pfetler.) strobilus. There is a single spore case at the base of each sporo- phyll. A few of the lower ones contain each a few very large spores, one to eight. These are called macros pores or mega- * The sporangia which produce the macrospores are called macrospor- angia or megasporangia, while those which produce the microspores are micros por an 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 Atkinson, George Francis, 1854-1918. New York, H. Holt and Company
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectbotany, bookyear1910
