The structure & development of the mosses and ferns (Archegoniatae) . sizeof the cells of the bundle itself—indeed it is not always easyto say exactly where the ground tissue begins. The xylem iscomposed of pointed tracheids whose walls are marked withthick reticulate bands. This mass of tracheary tissue is situatednear the inner side of the bundle, which like that of the stem iscollateral. The rest of the bundle is composed of sieve-tubes VIII THE P TERID OPH VTA—OPHIO GL OSS A CEA: 235 mingled irregularly with smaller cambiform cells. Whether ornot sieve-tubes occur upon the inner side of th
The structure & development of the mosses and ferns (Archegoniatae) . sizeof the cells of the bundle itself—indeed it is not always easyto say exactly where the ground tissue begins. The xylem iscomposed of pointed tracheids whose walls are marked withthick reticulate bands. This mass of tracheary tissue is situatednear the inner side of the bundle, which like that of the stem iscollateral. The rest of the bundle is composed of sieve-tubes VIII THE P TERID OPH VTA—OPHIO GL OSS A CEA: 235 mingled irregularly with smaller cambiform cells. Whether ornot sieve-tubes occur upon the inner side of the bundle couldnot be positively determined. The sporangiophore has muchthe same anatomical structure as the rest of the leaf, but stomataare quite absent from its epidermis. In this respect from O. vulgatuvi and allied species, where stomata aredeveloped upon the sporangiophore as well as upon the rest ofthe leaf. TJie Root The roots are formed singly near the bases of the leaves,and are light yellowish brown in colour, and so far as could be.
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Keywords: ., bookcentury1800, bookdecade1890, bookidstructuredev, bookyear1895
