The Brasswood (Xenoflora Cupreodendrum Giganteum) is a large tree-like xeno-organism, growing to 50–100m tall, with a trunk up to 10m in diameter. Brasswoods present large, straight cylindrical trunks with a smooth surface. Their bark is characteristically brown, with a metallic sheen and prominent dark red, horizontal stripping. In young trees, these stripes are closer together, lending a characteristic reddish hue to the bark of Brasswood saplings. Older specimens often present straight, unbroken bark with distant, thin striations. Root flare is often not present, but digging into the soil reveals a large, conical root structure presenting a deep taproot, with offshoot secondary roots stretching into the aforementioned conical pattern. Weight of a single specimen ranges from seven to nine million kilograms, or seven to nine thousand metric tons.

The crown is broad and widely spreading. The height at which branches first occur along the trunk – as well as the overall tree shape – vary considerably among individuals and are habitat-dependent characteristics. Frequently, Brasswood trees grow as single specimens when in grasslands. Under these conditions, massive, extended, horizontal limbs emerge low on the boles, forming giant, hemispherical, widely spreading crowns. In the forest (where competition for light is intense), trees tend to become taller, and branching occurs at a higher level. Tree forms then become somewhat narrower, though crowns are still rounded, and hemispherical shapes are maintained by those that have reached the canopy.

Leaf structure of the Brasswood tree is simple, entire, and stalked, with a general ovate shape, cordate base and obcordate tip, resulting in a striking double-oval shape. Coloration varies from deep moss-green to golden-brass and coppery-red during Euterpian autumn.

The fruit of the Brasswood is a round, heavy drupe-like structure with a metallic exocarp, a thin, edible mesocarp with a vaguely metallic taste, and a thick, leathery endocarp protecting a large, solid pyrena. Commonly called "Brass Balls" or "Cannonballs" by adventurous gourmet colonists, Brasswood fruit can be a nutritiously dense meal if an organism is capable of breaking past the outer, hard skin.