Text-book of botany, morphological and physiological . pores only by its decay. While in the genera Phascum and Ephemerum ^ theinternal differentiation of the theca corresponds essentially to that of true Mosses,although more simple, the genus Archidium displays a more considerable deviation,and as an interesting transitional form may be examined a little more closely 2. Thevery short pedicel of the sporogonium swells, as in Sphagnum and Hepaticae; theroundish theca ruptures the calyptra laterally, without raising it up as a cap. Archidiumagrees with the true Mosses in the formation in the the
Text-book of botany, morphological and physiological . pores only by its decay. While in the genera Phascum and Ephemerum ^ theinternal differentiation of the theca corresponds essentially to that of true Mosses,although more simple, the genus Archidium displays a more considerable deviation,and as an interesting transitional form may be examined a little more closely 2. Thevery short pedicel of the sporogonium swells, as in Sphagnum and Hepaticae; theroundish theca ruptures the calyptra laterally, without raising it up as a cap. Archidiumagrees with the true Mosses in the formation in the theca of an intercellular spacerunning parallel to its lateral surface, which separates the wall from the inner massof tissue. The latter appears as a continuous at the foot and apex with thewall of the theca. But while in the true Mosses a layer of cells parallel to this inter-cellular space produces the spore - mother-cells, it is here only a single cell lyingeccentrically in the inner mass of tissue that becomes the primary mother-cell of all.
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Keywords: ., bookcentury1800, bookdecade1870, booksubjectbotany, bookyear1875
