[USDA zone 7a – 11]
 
I imported some plants of Typhonium trilobatum a few years ago. These originated from Thailand. A couple of them have produced very round well shaped flowers (see first picture). Others not so nicely shaped but still nice Ty. trilobatum (see second and third pictures). I hope to be able to offer the better cultivars as either named or numbered cultivars in 2023. 
 
This species is native to Sri Lanka, eastern and northern India, Nepal, Bangladesh, Myanmar (Burma), Thailand, southern China, Vietnam, Laos, Cambodia, and the Malay Peninsula. These plants originated from Thai material. This species as with most Amorphophallus and Arisaema species is seasonally dormant. Plants sprout from a subterranean tuber. Plants of this strain grows 8” – 12” tall. Each tuber produces several leaves with thin petioles. The leaf blades are deeply cut, distinctly trilobed, and 5” – 7” long and wide. The inflorescence is produced from the center of the leaves and are often topped by the leaves. The inflorescence is single flowered and the “flower” opens with the leaves. The “flower” is actually a modified inflorescence that consists of the spathe (outer ornamental part) and the spadix (internal sexual bits). The spadix is 1½” – 3” tall. The spathe that surrounds the spadix is equally long but recurves back somewhat when the flower opens. The outside of the spathe is dark green to olive-green with some red-purple veins and splotches. The inside is dark maroon-purple to maroon-red. The flowers attract flies and carrion beetles for pollination. The scent is unpleasant but not that of a dead Musk Oxen. My best description is halitosis or a rotting potato with a chemical aspect.