The structure & development of the mosses and ferns (Archegoniatae) . B. Fig. 246.—Longitudinal section of the stem apex oi Lycopodium luciduhcm (Michx.), X 30. sp, Youngsporangium ; B, longitudinal section of the young sporangium of the same species, X 215. unable to determine positively whether such a one exists in theembryo. In L. phlegmaria ^ he describes and figures embryos,where a single prismatic apical cell is apparently present, butin others the presence of such a cell was doubtful, and in in no case did he find any evidence of a single vegetative cone of the ma
The structure & development of the mosses and ferns (Archegoniatae) . B. Fig. 246.—Longitudinal section of the stem apex oi Lycopodium luciduhcm (Michx.), X 30. sp, Youngsporangium ; B, longitudinal section of the young sporangium of the same species, X 215. unable to determine positively whether such a one exists in theembryo. In L. phlegmaria ^ he describes and figures embryos,where a single prismatic apical cell is apparently present, butin others the presence of such a cell was doubtful, and in in no case did he find any evidence of a single vegetative cone of the mature sporophyte is usuallybroad (Fig. 246) and only slightly convex. Its centre isoccupied by a group of similar initial cells, which in L. selago, Treub (2), vol. v. 2 Treub, PI. XXIX. XIV L YCOPODINE^E 471 according to Strasburgcr,^ usually show two initials in longi-tudinal section (Fig. 247, i). From these initials arc cut offlateral segments which, by further periclinal and anticlinal walls,produce the epidermis and cortex, and secondarily the
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Keywords: ., bookcentury1800, bookdecade1890, bookidstructuredev, bookyear1895
