brittle thatch palm, key thatch palm
Stems: Solitary, erect gray stems, to 11 m tall, up to 35 cm in diameter, with obscure, incomplete leaf scars, the upper reaches covered with matted fibers and split leaf bases, and a boss of fibrous roots at the base. Leaves: Palmate, induplicate, unarmed, with a circular blade 1-1.5 m across, divided at least half its length by numerous, lanceolate segments with stiff, bifid tips; petiole usually longer than the blade; leaf sheath with fibrous margins. The upper leaf surface is glossy green or glaucous; the undersurface, silvery, covered with white wax and tiny dark dot-like scales; midrib and marginal ribs prominent; transverse veinlets visible. Flowers and fruits: Inflorescence 1-1.2 m, emerging through split leaf bases, arching and branched to two orders, equal to or exceeding the leaves in length. The white flowers have both male and female parts. The fruits are small (6-8 mm in diameter), spherical and white when ripe; pedicel less than 1 mm.
Coccothrinax species, but they have chocolate brown to purple black fruit and leaf bases that do not split.
Native to Florida and the Caribbean
This species is listed as endangered by the state of Florida.
Thrinax morrisii H. Wendl.
Now Leucothrinax morrisii (H. Wendl.) C.E.Lewis & Zona
Simpsonia microcarpa (Sarg.) O.F. Cook
Thrinax bahamensis O.F. Cook
Thrinax drudei Becc.
Thrinax ekmanii Burret
Thrinax keyensis Sarg.
Thrinax microcarpa Sarg.
Thrinax ponceana O.F. Cook
Thrinax praeceps O.F. Cook
Thrinax punctulata Becc.