Fig. 352. — Ephedra campylopoda: longitudinal section of tip of staminate strobilus: 

 w, apical meristem of strobilus; b, bract; p, "perianth"; s, sporangiophore; a, Anlage 

 which is to develop into b, s, and p; X160. — After Strasburger.s''^ 



Fig. 353. — Ephedra irifurca: A, longitudinal section at tip of male strobilus, De- 

 cember 20, 1902; B, longitudinal section of male flower, a month later: br, bract; a, 

 sporangiophore; p, perianth; s, microsporangia; ar, archesporial cell; X150. — After 

 Land. "8 



