Amorphophallus atroviridis

Wilbert Hetterscheid described Amorphophallus atroviridis in 1994 based on material from central Thailand. It occurs as a seasonal geophyte growing among limestone rocks in provinces such as Saraburi and Lopburi. The plant produces a single umbrella-like leaf on a mottled petiole, featuring near-black velvety foliage with a continuous pink-crimson margin. It follows a strict seasonal cycle, dying back to an underground tuber that must be kept completely dry throughout winter dormancy.

Native range

Central Thailand (limestone karst, Saraburi and Lopburi provinces)

Classification

Genus

Amorphophallus

Family

Araceae

Type

Wild

Growth habit

Tuberous seasonal geophyte

Morphology

Leaf shape

Umbrella-like dissected blade with elliptic-lanceolateLance-shaped leaves that are significantly longer than they are wide, tapering to a point at the tip. leaflets

Leaf length

Canopy diameter 40-60 cm; leaflets 6-12 cm long

Leaf width

Leaflets 3-5 cm wide

Petiole colour

Olive green mottled with dark purple-black blotches

Venation

PinnateVeins or lobes arranged like a feather, branching out symmetrically on both sides of a single main central vein. secondary veins embedded in dark lamina

Texture

Velvety and matte

Variegation

Dark black-green lamina bordered by a solid pink margin

Growth habit

Solitary annual leaf arising from a flattened underground tuber