Tropical Zone Gardening: Tree ? Identification, 1 by lf2016

lf2016 wrote:
I would much appreciate help id\'ing these volunteer plants in the garden in Manzanillo Mexico. They appeared in a can where I tried to start some flower seeds - maybe a year ago, possibly less. The largest is 20\" (50 cm) tall. Biggest leaves are 10\" (25 cm) long and 5 - 6\" (13 - 16 cm) wide. Bottom of the main stem is woody. When I pulled a smaller one, it had a bulb or tuber not far under ground as well as hairy roots. Where broken, white sap oozed.