I grow Pinellia cordata. Little leaf tubercles that have fallen into the gravel-covered dirt between front walk and garage wall, open to sky but little if any direct sun, winter over. A Japanese friend told me that it is grown in a pot, to make it easier to lift to nose level and enjoy the delicate fragrance of the flowers. While P. cordata is no where near as much of a thug as P. pedatisecta - (could that be what TheSilentSeed collected as immature Sauromatum?) - I begin to have some suspicions about its good behavior. I re-potted my pot full of P. cordata and re-used the soil to re-pot a cordyline etc. Little P. cordata leaves are making an appearance. Arisarum probosciodeum is a favorite, love those little mouse tails peeking out of the foliage. I think that the hardiness / non-hardiness of Sauromatum might be clonal variation. If those I had were hardy I would think the ones I couldn't find last fall would have made an appearance by now. The flowers are unusual but I really cultivate it for its foliage and snake-like mottled stems. Elegant contrast to large hosta. My favorite arisaema is probably A. thunbergii v. urashima. Charming dark green pedatisect foliage (gee, think this appreciation of foliage might be why I wrote Consider the Leaf and Garden Design with Foliage?) and intriguing flowers. Of course that fact that all aroids are ignored by deer, woodchucks, rabbits, voles only adds to their appeal. Judy in humid New Jersey where last night's storm dumped 1.75 inches of rain on BelleWood Gardens