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FOC | Family List | FOC Vol. 23 | Araceae

1. Arisaema sect. Anomala Gusman & L. Gusman, Aroideana. 26: 40. 2003.

根茎组 gen jing zu

Plants with rhizome. Rhizome reddish purple inside. Phyllotaxy spiro-distichous. Leaf blade 3-foliolate or pedate, rarely simple. Spadix bisexual or rarely unisexual when mature; appendix sessile, terete, attenuate or long and pendulous distally, usually with numerous filiform neuter flowers.

About 20 species: wet tropical and subtropical Asia; 11 species (seven endemic) in China.


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


 

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