Spire Trees

Spire trees growing in the Shadowlands of Neo-Jalisco

Spire trees are tall, thin, genetically-engineered relatives of cypress trees that evolved to inhabit the low-gravity and perpetual twilight of the Shadowland Bogs on Neo-Jalisco.   The low light levels of the tree's natural environment made its needles grow black, in order to absorb all available light.

They were engineered as living security devices, designed to repel or kill intruders on the grounds of the estates of minor nobility in the star kingdoms of the Sagittarius Rim.  Spire trees are sensitive to infrared, which allows them to detect intruders.  When this happens, special growths under the branches of the tree release clouds of a potent neurotoxin.  In small doses, the toxin induces nightmarish hallucinations.  At higher doses, it kills the victim.  Spire trees are generally planted as defensive windbreaks, so if an intruder gets too close, a small dose of toxin is released.  If this does not deter the intruder, the other trees in close proximity release enough of the agent that it should kill any vertebrate unprotected by full-environmental armor.

Fire-grass

Fire-grass, also known as "Settler's Surprise", is a short, perennial grass native to the arid regions of New Promise.  Fire-grass has light blue-green leaves, and in the early summer produces small, white flowers.  Its most notable property is that which gives it its name.  The leaves of fire-grass contain a chemical that reacts violently with uric acid, bursting into flames when coming into contact with the substance.  Most animals in the regions where fire-grass grows do not excrete uric acid. 

When New Promise was first settled, several explorers, answering nature's call outdoors, were surprised to discover that they had inadvertently started grass-fires by doing so.  As farming and ranching operations expanded on the planet, extra care had to be taken to avoid the placement of animal-pastures in areas with fire-grass, and anyone needing to relieve themselves out-doors had to be careful of the vegetation. 

Fire-grass became a profitable export for the planet, being sold dried in sealed packets in kits of survival gear, as a means of starting a fire in an emergency.