National Geographic : 1937 Apr
Photograph byGilbert Grosvenor FOOD AND SHELTER FOR THE INDIANS WERE THE STATELY SAGUAROS, TALLESTOF DESERT PLANTS Red men made sirup and wine from the fruit, and pounded the shiny black seeds into flour. They fashioned ribsfor their huts from tough woody strands found inside the main trunk (page 532). When a fire is kindled at the base of one of these giant cacti, flames race over the tiny, dry spines. Warriors ofthe Papago tribe burned the plants as signals at night.