[Botany • 2021] Amorphophallus calcicolus (Araceae: Thomsonieae) • A New Species from the Bohol Island, Central Visayas, Philippines

Amorphophallus calcicolus from the forest over karst of Bohol island, Central Visayas, Philippines is hereby described and illustrated. The species is closely related to A. longispathaceus but distinct in having shorter leaves, smaller male zone, depressed disk-shaped ovary, longer styles, ovoid or irregularly shaped warts inside the spathe base, and shallowly 2–3-lobed stigma. Due to anthropogenic factors and a relatively confined distribution, it is hereby proposed as Critically Endangered (CR) following IUCN guidelines.

Keywords: aroids, karst, Loboc watershed, Malesia, monocots, taxonomy