Calamus posoanus

NEW YORK BOTANICAL GARDEN
PALMS OF SULAWESI
Indonesia. Sulawesi Tengah: Poso Regency, Tambing Lake, Lore Lindu National Park, relatively
undisturbed forest near lake, 01° 19.578’S, 120°18.609’E, 1580 m elevation. 25 October 2017.
Calamus posoanus Rustiami
Stems solitary, 30 m long, 3 cm diameter. Sheaths densely covered with rings of brown, needle-
like spines, denser and erect at sheath apex; petioles 24-27 cm long; rachises 78 cm long; pinnae
9 per side of rachis, elliptic, distantly but regularly arranged, without spinules on veins, with
numerous vestigial spinules all over abaxial surface; apical pair of pinnae not reduced; cirri
spines regularly arranged. Inflorescences pistillate, 159 cm long, erect; rachis bracts brown,
overlapping, without spines.
A. Henderson, Ramadhanil Pitopang, Sahlan & Martin Topanga 4298
Fieldwork carried out in collaboration with Tadulako University and funded by a Fulbright
Scholar Award.
03698071