A List of Plants Id like to Test:

Pacific Waterleaf Hydrophyllum tenuipes similar species Surinam Purslane

Great Burdock Arctium lappa

Stinging Nettle Urtica dioica

Fireweed Senecio madagascariensis

Milkweed Euphorbia peplus

Cattail Typha latifolia

Phragmites grass

Several of these plants grow in Australia. I swear Ive seen Pacific Water Leaf some where. However there are several similar plants Id like to see If I can process to a use-able material for using with a flint and steel without charring.

https://en.wikipedia.org/wiki/Urtica_dioica

https://en.wikipedia.org/wiki/Arctium_lappa

https://en.wikipedia.org/wiki/Hydrophyllum_tenuipes

https://inaturalist.ala.org.au/taxa/77472-Hydrophyllum-tenuipes

https://greenharvest.com.au/Plants/Information/SurinamSpinach.html

https://www.abc.net.au/gardening/how-to/water-loving-natives/13150502

https://en.wikipedia.org/wiki/Chamaenerion_angustifolium

https://en.wikipedia.org/wiki/Typha_latifolia

https://en.wikipedia.org/wiki/Phragmites