Arisaema exappendiculatum is the only Arisaema having no spadix appendage extending above the male or female flowers on the spadix.
In most other respects it looks very similar to Arisaema concinnum. However, when flowering, distinguishing between the species is very simple with the lack of spadix appendix being instantly obvious. The inflorescence is either male or female.
Colour forms vary, with both green, purple, and intermediate forms common. The spathe limb tends to be erect and sometimes extends into a long tip.
Arisaema exappendiculatum has one or two radial leaves and a prominent pseudostem.
The tuber is subglobose and stoloniferous, reaching around 5 or 6cm in diameter and multiplies via underground stolons. These can be quite large and typically between 1 and 3 are produced in a season. In appearance, the tuber is impossible to tell apart from Arisaema concinnum, and these are commonly muddled up within the nursery trade.
Seeds and germination:
Seeds can be stored dry with no significant loss of viability. Germination is easy and typically takes around 6 – 8 weeks.