Monographs Details: Sideroxylon bolivianum Rusby
Authority: Rusby, Henry H. 1927. Descriptions of New Genera and Species of Plants Collected on the Mulford Biological Exploration of the Amazon Valley 1921-1922. Mem. New York Bot. Gard. 7: 205-387.
Family:Sapotaceae
Description:Distribution and Ecology - (Fruiting specimen.) Glabrous. Branchlets stout, leafy. Petioles 1.5 to 2 cm. long, slightly decurrent upon the stem, narrowly channeled above by the incurved margins, which are continuous with those of the blade. Blades to 1.5 dm. long by nearly 6 cm. wide, oblanceolate or obovate with acuminate base and rounded, mostly slightly apiculate summit, entire, thick, pale or light-green on both surfaces, the midrib stout and rounded on the lower surface, mostly channeled above, the principal secondaries 15 to 18 on each side, with many smaller ones, spreading widely, little curved except at the ends, very slender, the slender venation strongly anastomosing. Fruits crowded below the leaves, sessile, globose or slightly broader than long, 2 to 2.5 cm. broad in the dried state, very fleshy, mostly 4- or 5-seeded. Seeds about 1 cm. long, two thirds as broad, brown, strongly shining, nearly ellipsoid, the hilum oblong, extending nearly the entire length.

Distribution and Ecology - Huachi, 3,000 feet, H. H. Rushy, August 22, 1921 (no. 691). "A large forest tree with abundant milky juice. Fruit yellow, sweet and good, but depositing an objectionable amount of gummy resin upon the teeth."