^V'emb'er^i™'}  Structure  of  Geranium  Maculatum.  517 
bearded.  The  stamens  are  ten  in  number,  in  two  whorls,  the  outer 
whorl  sometimes  sterile,  but,  when  perfect,  ripening  and  shedding 
their  pollen  before  the  inner  one,  and  the  latter  shedding  their  pol- 
len before  the  stigmas  have  unfolded,  so  that  the  flowers  are  protan- 
drous.    The  filaments  are  broadened  at  the  base  and  somewhat 
Fig.  1. 
united ;  the  anthers  are  two-lobed  and  longitudinally  dehiscent.  The 
pistil  has  its  five  carpels  united  about  a  lengthened  receptacle,  which, 
along  with  the  adherent  portion  of  the  styles,  develops  in  fruit  into 
a  long  beak.  The  ovary  is  deeply  five-lobed  and  five-celled  and  each 
cell  contains  a  single  seed.  Each  carpel  separates  elastically,  begin- 
ning at  the  base,  from  the  elongated,  persistent  receptacle.  The 
