Abstract: Pollen viabilities of nine species and five varieties of Paris were evaluated using TTC(2, 3, 5-triphenyl tetrazolium chloride), while stigma receptivities were measured by a benzidine-H₂O₂ method. 1) Pollen viabilities of Paris species were lower than 50%, except for P. cronuistii, which was up to 52.8%; 2) Pollen viabilities were different between species, varieties, and populations; 3) Stigma receptivities were different between species, but the same among populations within a species; 4) Stigma of P. thibetica and P. bashanensis had no receptivity at all. Stigma receptivities were in positively related to pollen viabilities of P. axialis, P. delavayi, P. polyphylla, P. forrestii, P. delavayi var. petiolata, P. polyphylla var. chinensis and P. polyphylla var. stenophylla. However, there were no correlations in P. cronuistii, P. polyphylla var. yunnanensis, P. undulata and P. fargesii var. brevipetalata; 5) Anthers opened in the morning and closed at dusk each day during the blooming period.