Inodes.
Leaves flat, midrib rudimentary; segment without alternating fibers.
Leaves chartaceous, naked on both sides when mature, the veinules unequal; fruits nearly sessile; seeds smooth, albumen solid except for a deep basal cavity.
Thrinax.
Leaves tough and coriaceous, the lower surface silvery with a persistent, closely appressed pubescence; veinules equal; fruits distinctly pedicellate; seeds deeply grooved or furrowed.
Trunk tapering upward, tall and slender; pedicels short, bracteate at base; seeds subspherical, ruminate with deep narrow grooves; surface with a dull membranous cuticle.
Thrincoma.
Trunk columnar, of equal diameter or enlarged upward; pedicels long, bracteate above the base; seed naked, smooth and shining, cerebriform, the surface irregular with broad furrows and convolutions.
Thringis.