1	Pseudostem distinct (more than 10 cm)		(2)
+	Pseudostem absent or very short (less than 5 cm)		(6)
2 (1)	Leaf blade pedate or rarely 3-foliolate; neuter flowers occurring partly on spadix appendix		(3)
+	Leaf blade 3-foliolate; neuter flowers covering whole of spadix appendix		(4)
3 (2)	Spathe basically green, throat of spathe tube not auriculate.		8 A. grapsospadix
+	Spathe basically green, or dark purple dotted with paler purple, throat of spathe tube auriculate.		9 A. hainanense
4 (2)	Neuter flowers (distal ones) 3-5.5 cm.		5 A. victoriae
+	Neuter flowers less than 0.7 cm		(5)
5 (4)	Rhizome stout, more than 3 cm in diam.; spathe semitranslucent, without white mark.		1 A. petelotii
+	Rhizome less than 2.5 cm in diam.; spathe opaque, with white mark.		7 A. rubrirhizomatum
6 (1)	Budlike structure present at axil of neuter flowers.		2 A. smitinandii
+	Budlike structure absent at axil of neuter flowers		(7)
7 (6)	Apex of spadix appendix simple or nearly so		(8)
+	Apex of spadix appendix brushlike, covered with numerous neuter flowers		(9)
8 (7)	Spathe tube throat broadly auriculate; spadix appendix with neuter flowers.		11 A. bannaense
+	Spathe tube throat without auricles; spadix appendix without neuter flowers.		10 A. petiolulatum
9 (7)	Spathe limb basically purplish, tube thick; spadix appendix pendulous.		4 A. lihengianum
+	Spathe limb basically green, tube slender; spadix appendix upright		(10)
10 (9)	Spathe limb with single white mark at base.		6 A. pingbianense
+	Spathe totally greenish, without marks.		3 A. menglaense