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FOC | Family List | FOC Vol. 23 | Araceae

10. Arisaema sect. Pistillata (Engler) Nakai, Bot. Mag. (Tokyo). 43: 525. 1929.

花南星组 hua nan xing zu

Arisaema [unranked] Pistillata Engler, Pflanzenr. 73(IV. 23F): 151. 1920.

Plants with tubers, paradioecious. Phyllotaxy spiro-distichous. Leaves 1 or 2; leaf blade 3-foliolate or pedately multifoliolate. Spadix unisexual; thecae dehiscing by an apical elliptic or oblong slit; appendix erect, slightly exserted from spathe tube, cylindric, base nearly truncate and stipitate, apex obtuse.

About 57 species: E Asia, North America; six species (three endemic) in China.

1 Spathe blade cucullate-galeate.   61 A. ringens
+ Spathe blade flat, not cucullate-galeate   (2)
2 (1) Underground stem obovoid, stoloniferous.   59 A. xuanweiense
+ Underground stem a subglobose tuber, not stoloniferous   (3)
3 (2) Tuber bluish green outside; leaf blade always 3-foliolate, glaucous abaxially, always entire; infructescence nodding.   60 A. lobatum
+ Tuber whitish outside; leaf blade pedate with 5 or more leaflets, or rarely 3-foliolate, usually not glaucous abaxially, occasionally serrate or dentate; infructescence upright   (4)
4 (3) Pseudostem much shorter than petioles (except sheath part).   62 A. amurense
+ Pseudostem longer than petioles   (5)
5 (4) Leaflets usually 5-7; spathe tube funnelform, throat oblique, scarcely recurved.   63 A. bockii
+ Leaflets usually 7 or more; spathe tube cylindric, throat horizontal, narrowly recurved.   64 A. peninsulae


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