233 
-V-: 
FIG. 529. Archegonia of Ephedra, showing 
their elongated form and massive necks. After 
528 LAND. 
FIG. 528. Diagrammatic section of ovule of Ephedra, showing outer integument 
(pi), inner integument (if) forming the long micropylar tube, the remarkable pollen- 
chamber (pc), and the elongated female gametophyte (within the embryo sac) with 
two long-necked archegonia. After LAND. 
