ripe sporangia of ustilago fungus

agriculture blossom branch cob cobs corn cuitlacoche delicacy edible evergreen feeding flower food fruit fungus gray green herb huitlacoche leaf maydis mays mexican nature petal phytosanitary plant produce ripe scorch shrub silver silver-grey smut smuts specialized sporangia sporangium spores stages tree truffle ustilago wildflower young zea