Arisaema sect. Odorata

Ma, Zheng-Xu, Du, Wen-Yan & Wang, Xiao-Yun, 2019, A new species and a new combination of the genus Arisaema (Araceae) from China, Phytotaxa 395 (4), pp. 265-276 : 275

Key to the Arisaema sect. Odorata

1. Spadix bisexual or staminate..............................................................................................................................................................2

– Spadix unisexual.................................................................................................................................................................................4

2. Spathe green with a white patch at middle; spadix-appendix recurved ......................... A. lidaense J.Murata & S.K.Wu (2003: 81)

– Spathe without the white patch at middle; spadix-appendix pendulous.............................................................................................3

3. Spathe pure white, spathe-tube infundibuliform; spadix-appendix long cylindric .............................................................................. ........................................................................................................... A. odoratum J.Murata & S.K.Wu in Murata et al. (1994: 153)

– Spathe greenish with white stripes, spathe-tube cylindric; spadix-appendix filiform.......................................................................... ............................................................................................................................................................. A. prazeri Hooker (1894: 501)

4. Spathe entirely white ........................................................................................................................... A. mairei Leìveilleì (1915: 10)

– Spathe green, or with white longitudinal stripes................................................................................................................................5

5. Spadix-appendix flagelliform, pendulous or upright..........................................................................................................................6

– Spadix-appendix recurved..................................................................................................................................................................8

6. Leaf blade integrate or 3-foliolate; spadix-appendix linear, often purplish and twisted distally ......................................................... ..................................................................................................................................... A. bathycoleum Handel-Mazzetti (1925: 123)

– Leaf blade pedate, always 5–9-foliolate; spadix-appendix thick cylindric, attenuate to apex...........................................................7

7. Leaf blade (1–)3–5-foliolate; ovary fusiform; spadix-appendix linear, pendulous............................. A. saxatile Buchet (1911: 124)

– Leaf blade 5–9-foliolate; ovary bottle shaped; spadix-appendix upright or pendulous .......... A. aridum H.Li in Li et al. (1977:107)

8. Spathe pure olive-green; tube long cylindric; mouth with darkened reticulation, auriculate; gynoecium lax; spadix-appendix slender cylindric ........................................................................................................................... A. longitubum Z.X. Ma (2018: 295)

– Spathe green with white stripes; tube funnelform; mouth margin obliquely truncate, non-auriculate; gynoecium dense; spadix-appendix thick cylindric .................................................................................................................................................................... 9

9. Leaf blade 5-foliolate; chromosomes 2n=48................................................. A. yunnanense Buchet subsp. yunnanense (1911: 367)

– Leaf blade 3-foliolate; chromosomes 2n=24.................. A. yunnanense Buchet subsp. quinquelobatum (H.Li & J.Murata) Z.X.Ma