25 (35)cm, a Japanese species from moist woodlands. It makes a five-lobed leaf and a showy brownish spathe striped white in mid spring. Formerly regarded as a variety of Arisaema ovale (Arisaema ovale var. inaense), now treated at species rank. For any humus rich, very well drained soil with some good winter protection. In colder regions preferably grow in pots under frostfree conditions in a sunny spot throughout the year. During dormancy in winter keep plants almost completely dry at some 10°C. This stock has NOT been clearly identified as real Arisaema inaense and it might turn out to be a dark colored form from Arisaema ovale. USDA climate zone 9. V.