서봉옥(瑞鳳玉) Astrophytum capricorne

  
                            서봉옥(瑞鳳玉)                                                    군봉옥(群鳳玉) Astrophytum senile

  
                                                           군봉옥(群鳳玉) Astrophytum senile

  
 대봉옥(大鳳玉) Astrophytum capricorne var. crassispina                            황봉옥금(黃鳳玉錦)