Arisaema parisifolia is a species from mainland South East Asia. Its distribution is incompletely known and there is still more to learn about its characteristics and how it relates to other similar species from the same region. It has been recorded from Laos and Vietnam, but likely also extends North over the border with China. Plants that are very similar, if not the same, have been collected about 100km North of the Vietnam / China border (see images below).
Arisaema parisifolia was described by the Japanese botanist, J. Murata, in 2005. The plant was originally named Arisaema petiolulatum by Gagnepain. However, this name already existed for a separate species from Section Anomala, and so was invalid. After looking at the herbarium records at Kew and Paris, Murata decided that the plant Gapnepain had described was a distinct species and settled on the new name Arisaema parisifolia. Therefore, it has been described based purely on herbarium records, rather than living specimens.
Defining features are the petioluate leaflets, a narrow cylindrical spathe with an upright lamina, auriculate mouth, and a very narrow spadix appendix.
The plant shown below was collected in China, around 100km North of the Vietnam border. It shows very strong similarities to Arisaema parisifolia and I have labelled this as A. aff. parisifolia in my collection. It seems to be an easy and vigorous plant. Unlikely to be hardy.
The tuber is subglobose and appears to flower from a small size of only only 2cm in diameter or so. Sessile offsets are made, although these do not seem hugely abundant in the plants I am cultivating.
Seeds and germination:
Yet to set seed here, and information is scarce, or non-existent, therefore I am unable to comment with any certainty. However, seeds from species within Section Sinarisaema as a rule do not significantly lose viability when stored dry.