t 



i 



1 



* 



1907] CALDWELL— MICROCYCAS CALOCOMA 141 



apparently are beginnings of bud scales; first leaf circinate, distinctly hairy, and 

 showing the beginning of leaflets. Xj. 



Fig. 45. Plantlet, of same age as in fig. 44, removed from the earth; does not 

 show scale-like growths. Xi. 



PLATE XIII 



Fig. 46, Pollen tubes in nucellus; body cells (eight in each of two tubes) 

 seen in the ascending haustorial branches. 



Fig. 47. Two body cells, showing form of nucleus^ blepharoplasts, and 

 radiating cytoplasm. 



Fig. 48. Tip of female gametophyte, showing mass of archegonia. 



Fig. 49. Cross-section of female gametophyte about 3^"^ from micropylarend. 



Fig. 50. Longitudinal section of female gametophyte, showing archegonia at 

 micropylar end, along both sides, in median line, and at basal end. 



