Big ariseama collector here
Pam:
The first comprehensive study since 1920 of this fascinating genus has recently
become available. The Genus Arisaema- A Monograph for Botanists and Nature
Lovers by Guy and Liliane Gusman.
ISBN 3-904144-91-X (available for less than $45 online). I'm looking forward to
finally ID'ing several of my plants.
Cheers,
Mark