[USDA zone 9a – 10b]
 
Plants are first year seedlings. At this writing (2022 - September) most are producing their second growth. Plants will be 5" - 8" tall. With proper culture I expect plants to flower in 5 - 6 years.
 
This species is native to lowland areas of western Sumatra. This species as with most Amorphophallus and Arisaema species are seasonally dormant. Plants sprout from a subterranean tuber in the same fashion as the spring Crocus. Mature tubers of this plant are enormous, similar to that of Am. titanum. Mature plants of this species grow 8’ – 14’ tall. Each tuber produces a single stem that terminates with a single “leaf”. Each leaf consists of an inverted umbrella of smaller leaflets that is 8’ – 10’ across. The leaf stem is dark green covered with irregular light green, gray-green, and grey-white blotches. These markings resemble lichens. The plant alone is very ornamental. The inflorescence is produced from the naked tuber before the leaves are produced. The entier inflorescence is 6’ – 12’ tall, with 3’ – 7’ being a basal peduncle (stem). The inflorescence is single "flowered”. The “flower” is actually a modified inflorescence that consists of the spathe (outer ornamental part) and the spadix (internal sexual bits). The spadix is 3’- 6’ tall and enclosed within the spathe. The spadix appendage (non-sexual part) is cream-yellow to light yellow, extremely elongated, and tapers to a blunt point. The spathe that surrounds the spadix is 3’ – 4’ long. The exterior of the spathe light green mottled darker green basally and dark red-purple at the apex. The interior of the spathe is and dark red-purple. Flowers last a few days.