Feel free to update this if you have the inclination, the descriptions are a bit rushed.

• 00 - flower 1
• 01 - flower 2
• 02 - flower 3
• 03 - koopa troopa hedge?
• 04 - big turtle shell (green)
• 05 - pine tree
• 06 - another pine tree
• 07 - thin tree
• 08 - thick tree
• 09 - hedge 1
• 0A - clay-ish tree
• 0B - spikey tree
• 0C - (shorter?) turtle shell (green)
• 0D - red turtle shell
• 0E - spikey red turtle shell
• 0F - flowering cactus
• 10 - cactus
• 11 - (taller?) cactus
• 12 - shyguy cactus
• 13 - shyguy brown
• 14 - green pillar
• 15 - pink pillar
• 16 - blue pillar
• 17 - red mushroom
• 18 - green mushroom
• 19 - palm tree 1
• 1A - palm tree 2
• 1B - palm tree 3
• 1C - orange
• 1D - strange fruit (find name)
• 1E - piranha plant
• 1F - red tulip
• 20 - flower 4
• 21 - flower 5
• 22 - hedge 2
• 23 - 100 sign
• 24 - 200 sign
• 25 - 300 sign
• 26 - 400 sign
• 27 - +50 sign
• 28 - flag sign
• 29 - bob-omb
• 2A - red bob-omb
• 2B - pink tree
• 2C - blue tree
• 2D - green tree

Using further values creates glitched graphics.