The structure & development of the mosses and ferns (Archegoniatae) . JOO o. o -r tq J3 — bB o •? a -w 1) n! JS > o<u S ^ o .2 6 •£3 5 ^S e -a o ^—1 ^ a ? 3 o o ^ (U ni j3 ^ o 0) d u s . 3 < -5 CHAi. V THE ANTHOCEROTE^ 133 Up to the point where the archesporium becomes dividedinto two layers the cells appear alike ; but shortly after thistheir walls begin to separate, and two distinct forms are re-cognisable, arranged with much regularity in many cases,although this arrangement is not invariable. Pretty regularlyalternating are groups of oval, swollen cells, with large nucleiand abund
The structure & development of the mosses and ferns (Archegoniatae) . JOO o. o -r tq J3 — bB o •? a -w 1) n! JS > o<u S ^ o .2 6 •£3 5 ^S e -a o ^—1 ^ a ? 3 o o ^ (U ni j3 ^ o 0) d u s . 3 < -5 CHAi. V THE ANTHOCEROTE^ 133 Up to the point where the archesporium becomes dividedinto two layers the cells appear alike ; but shortly after thistheir walls begin to separate, and two distinct forms are re-cognisable, arranged with much regularity in many cases,although this arrangement is not invariable. Pretty regularlyalternating are groups of oval, swollen cells, with large nucleiand abundant granular cytoplasm, and much more slender ones,that may undergo secondary longitudinal divisions. Thelatter have smaller nuclei and more transparent higher up shows that the former are the sporemother cells, the others the elaters, which here have the char-acter of groups of cells, and do not develop the spiral thicken-ings found in most Hepaticae. As these two sorts of cellsgrow older they separate completely, and the spore mothercells
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Keywords: ., bookcentury1800, bookdecade1890, bookidstructuredev, bookyear1895
