Decades Old No ID plants from Grandpa’s Yard

[Spgasc]

Hi everyone could you help me identify these two plants that have ultimately survived the test of time in my grandpa’s backyard who was an avid orchid collector. Both are tiny white flowers with odd shapes. One of them only blooms after extremely hard rain and the blooms last for a day.

Thanks in advance for all of the help.

[Spgasc]

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