The hard (very hard) rubber consistency seems to be in the S. laeve/cepa group. S. bovista is usually softer, and the peridium (outer shell) usually thin and sometimes a little shiny, like Bovista pila. What we really need is another obs. if possible: one that includes that easily broken off underground (hypogeous) pseudorhiza.
Another helpful piece of information would be the soil conditions at the site. I haven’t been to Vancouver, so can’t tell whether the soil is full of cobbles, like Seattle; or sandy, like Oceanside.
Yes, microscopy helps (a lot) too. Obs. including nearby trees helps too, as Scleroderma always mycorrhizal. Photos seem to indicate location of obs. in lawn?