Senior moments strike again; how could I have got it so mixed up?

Specht's classification has (and I hope the table is decipherable)
Density of tallest stratum 70-100%,    30-70%;                      10-30%,    <10%
Ht of tallest stratum
Shrubs 0-2m                     closed- or   open- heath;             low    or    low open-shrubland
Shrubs 2-8m                     closed- or   open- scrub;             tall      or    tall open-shrubland
Trees 5-10m                     low closed- or low open-forest; low    or    low open-woodland
Trees 10-30m                  closed- or   open- forest;             woodland or open-woodland
Trees >30m                      tall closed-   or tall open-forest; tall woodland or tall open-woodland

I suspect Guest's US brush may be equivalent to Oz scrub, shrubland or low closed-forest; the biggest forest fires in Oz occur in tall open-forest.

Cheers, Rowan (I can go back to sleep, now)