A torchspine alternates between active and quiescent phases and emits dim light when active. They can be harvested for torches, and their embers sprout into new torchspines when placed on flammable surfaces.=
Aside from the artistic applications of its particularly dark color, black cap wood is a long-burning fuel source that's as good as coal for some applications. Black cap gills are oily and make for excellent torch fuel.=
Blood thorns are the most vicious of underground flora, as befits their harsh environments. Found only in hot, dry caverns with sandy soil far from the surface world's organic bounty, blood thorns seek to supplement their nutrient supply with wickedly barbed hollow spines that actively drain fluids from whatever stray plant or creature they might impale.=
Fungiwood stalk is strong and very fine-grained, making smooth yellow-tinted lumber when cut. Fungiwood shelf is too fragile to be much use as anything other than fuel.=
Golden Spindlestems are a sign of rare and magical mineral deposits nearby. Their glowing symbiotes can be extracted as a strong and long-lived light source.=
Green Spindlestems are a sign of nearby copper deposits. Their glowing symbiotes can be extracted as a long-lived light source, though the glow is not strong.=
Living blood thorn spikes remain harmful to creatures that touch them. If killed by bright light, they cause only passive damage to creatures that fall on them (as one would expect from an enormous spike).=
Nether cap wood, in addition to being a beautiful blue hue, retains the odd heat-draining ability of living nether caps and is able to quickly freeze nearby water solid.=
Nether caps have an unusual biochemistry that allows them to somehow subsist on ambient heat, in violation of all known laws of thermodynamics. They grow deep underground in frigid, icy caverns that should by all rights be volcanic.=
Red Spindlestems are a sign of nearby iron deposits - or perhaps Goblin Caps. Their glowing symbiotes can be extracted as a long-lived light source, though the glow is weak.=
Spindlestems are too big to easily pluck by hand but too small to be called a proper tree. Nevertheless, they are a common and useful resource for underground travelers - particularly their glowing caps.=
Spore trees have a sturdy 'trunk' that supports a large spongy mesh of branching fibers, with embedded fruiting bodies that produce a copious amount of spores that gently rain down around the spore tree's base.=
The spikes of a blood thorn can actually remain living long after they're severed from their parent stalk, a testament to their tenacity. As long as they remain alive they will continue to actively drain anything they puncture, though they don't grow.=
The stem of a Spindlestem is surprisingly sturdy, and despite their thinness they can grow quite tall. They can be used as a wood substitute in many crafting recipes.=
The trunk of a tunnel tube can be cut and processed to produce plywood-like material. The fruiting body accumulates high-energy compounds that, when ignited, produce a vigorous detonation - a unique adaptation for spreading tunnel tube spawn through the still cavern air.=
Torchspines are strange organic formations that are alive only in a technical sense. They "feed" on volatile flammable vapors vented up through their structure, growing from combustion residue deposited at their tips.=
When harvested, the central stalk of a blood thorn can be cut into planks and used as wood. It has a purple-red hue that may or may not appeal, depending on one's artistic tastes.=
