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Self‐pollination of Asarum caulescens Maxim. (Aristolochiaceae) in Japan
Author(s) -
Tanaka Hajime,
Yahara Tetsukazu
Publication year - 1987
Publication title -
plant species biology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.419
H-Index - 36
eISSN - 1442-1984
pISSN - 0913-557X
DOI - 10.1111/j.1442-1984.1987.tb00040.x
Subject(s) - biology , aristolochiaceae , pollinator , sect , pollination , pollen , botany , maxim , inbreeding , population , demography , sociology , political science , law
Observations in two populations of Asarum caulescens belonging to sect. Asarum indicate that inbreeding predominates becuase (1) no effective pollinator was observed, (2) bagged flowers set fruits with well‐swollen seeds, and (3) the behaviour of filaments, changing from recurved to straight posture, results in direct deposition of pollen grains on the stigmas. This result agrees with reports on three other species of sect. Asarum in Europe and North America. We suggest that species of sect. Asarum diverged from an autogamous ancestor.