Calamus posoanus

NEW YORK BOTANICAL GARDEN
PALMS OF SULAWESI
Indonesia. Sulawesi Tengah: Poso Regency, road from Tambing Lake to Sedoa, undisturbed
forest on steep slope, 01°19.834’S, 120°19.339’E, 1640 m elevation. 15 November 2017.
Calamus posoanus Rustiami
Stems apparently solitary, at least 25 m long, 2.2 cm diameter. Sheaths densely spiny with close,
partial rows of horizontal, brown, needle-like spines; petioles 17 cm long; rachises 90 cm long;
pinnae 8-9 per side of rachis, regularly and distantly arranged along the rachis, not spinulose, not
reduced at rachis apex; cirri spines in regular groups. Inflorescences 160 cm long, inserted near
knee, ending in a short, straight structure 10 cm long; rachis bracts without spines, brown
tomentose; fruits globose, white.
A. Henderson, Sahlan & Semuel Torokano 4322
Fieldwork carried out in collaboration with Tadulako University and funded by a Fulbright
Scholar Award.
03698063