. The structure and development of mosses and ferns (Archegoniatae). r T rt ? Pc .a c .s c .t; ^> u «.2 C bo s o >> 9, •- <j X -^ . X c « J2 Hc 3 O C S o •<, °St ^ .^ >^^# .2 ^ *> • _r O C t3 K C3 « a oB »4 cd o ones crowded so as to present much the appearance of a flowerwhose centre forms a small reddish disc. These male plantseither grow separately or more or less mixed with the females. 196 MOSSES AND FERNS ciiw. Whether the first antheridium, as in Andrecea and Fontinalis,arises from the apical cell is doubtful, and it is impossible totrace any regularity in the order
. The structure and development of mosses and ferns (Archegoniatae). r T rt ? Pc .a c .s c .t; ^> u «.2 C bo s o >> 9, •- <j X -^ . X c « J2 Hc 3 O C S o •<, °St ^ .^ >^^# .2 ^ *> • _r O C t3 K C3 « a oB »4 cd o ones crowded so as to present much the appearance of a flowerwhose centre forms a small reddish disc. These male plantseither grow separately or more or less mixed with the females. 196 MOSSES AND FERNS ciiw. Whether the first antheridium, as in Andrecea and Fontinalis,arises from the apical cell is doubtful, and it is impossible totrace any regularity in the order of formation of the verynumerous antheridia. Except in old plants, all stages of de-velopment are found together, and the history of the anther-idium may be easily followed. A superficial cell projects aboveits neighbours, and this papilla is cut off by a transverse wall.
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Keywords: ., bookauthorcampbelldouglashought, bookcentury1900, bookdecade1910
