i tried several different flowers and foliages one at a time and the only one that seemed to work for me for the COMMON TIGER DRAGONFLY was the JALAPA flower.

So here is what I think. There are 48 bugs. These can be divided into 3 categories:

(a) 32 need no special flowers or foliage
(b) 8 need a special flower
(c) 8 need a special foliage
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32 + 8 + 8 = 48 total bugs.

here are the 8 that need a special flower:
uncommon Amber Butterfly - Aureus
rare Jet Moth - Nox
rare Golden Butterfly - Fabled
common Tiger Dragonfly - Jalapa
rare Black Dragonfly - Venomous
rare Golden Dragonfly - Blazing
uncommon Mystic Scarab - Mystic
rare Tahitian Spider - Tahitian

here are the 8 that need a special foliage:
common Fern Butterfly - Fern
common Shiny Blue Beetle - Ball Cactus
rare Shiny Flower Beetle - Orchid
rare Golden Beetle - Ananas
uncommon Glassy Dragonfly - Multiflora
common Cactus Spider - Pipe Cactus
uncommon Bamboo Spider - Bamboo
rare Golden Spider - Ridgeball

Cheers,
Borg