Leptecophylla tameiameiae exhibits a range of growth forms, from compact to slender shrubs, sometimes assuming a tree-like stature or presenting as a dwarfed, trailing form in bogs, with stem lengths varying from 0.9 to 3(–5) meters. The leaves are simple, alternate, and vary in their spacing on the stem, with blades that come in various shapes and sizes, including lanceolate–oblong, oblong, or lanceolate to elliptic or ovate-elliptic, measuring 4–10(–14) mm in length and 1.5–5(–6) mm in width. These xeromorphic leaves may have a mucronate apex or an awn up to about 1 mm long, and they typically taper to a subsessile and usually puberulent base. The upper surfaces of the leaves might be dull or glossy and are glabrous except often puberulent toward the base. In contrast, the lower surfaces are usually glaucous between veins, with the leaves being thin or thick and coriaceous. The flowers appear in axillary positions on peduncles approximately 1.5–3 mm long, with each flower subtended by two bracts and encased in about 5–9 imbricate bracteoles. The flowers can be bisexual (perfect) or unisexual (resulting in gynodioecious plants), small, and actinomorphic (radially symmetric), featuring a calyx of 5 sepals that are coriaceous and similar to but more significant than the bracteoles. The corolla is urceolate and 5-lobed, ranging in color from white to pale pink, and measures (2.5–)3.5–4(–4.5) mm in length. The fruit is dark red to pink or sometimes white, dry, and mealy, measuring 4–6 mm wide, with a fleshy mesocarp and a bony endocarp. The seeds are pale brown, ovoid, and about 0.2 mm long, with a thin seed coat and copious, oily endosperm. It thrives in various habitats, from mesic forest to open areas of low elevation or montane wet forest, fog-swept alpine shrubland, and bogs, occasionally appearing in windward coastal sites between 15-3,230 meters.