Tetragastris balsamifera
Region: Costa Rica, Nicaragua, Panama, Amazon.
Genus: 9 species.
Ecology: threatened by habitat loss.
Botany
Trees.
Stem: bark thick, fissured.
Leaves: pulvinulus always present at apex of terminal petiolule but absent from lateral petiolules; leaflet margin entire, freely ending veinlets highly branched.
Flowers: 4–5-merous; stamens in two series of subequal or unequal length; calyx partially synsepalous but sinuses often split to unequal depth at anthesis; petals fused at least 1⁄2 their length; filaments in male flowers strap-shaped and continuous with the anthers; disk and pistillode replaced by a continuous (rarely articulated) ovariodisk; female flowers with anthers sagittate, intrastaminal annular disk present.
Fruit: obliquely ovoid to subglobose; maturing red, pale green; valves pale red within; pseudaril white, pyrenes cartilag-inous; testa papery; cotyledons plano-convex, straight or rarely uncinately folded; germination epigeal and phanerocotylar; first eophylls opposite, simple.