| Summary: | Investigations of the biology of flowering and pollen value of seven species of Umbelliferae family were carried out in natural seats of Lublin region in 1978-1980. Aegopodium podagraria L.,Angelica silvestris L., Anthriscus silvestris L. (Hoffm.), Chaerophyllum aromaticum L., Eryngium planum L., Herac1eum sibiricum L., Pastinaca sativa L. were examined. This paper shows results of studies of the biology of flowering and abundance of flowering. The examined species started their flowering in the following chronological order: Anthriscus silvestris, Aegopodium podagraria, Pastinaca sativa, Chaerophyllum aromaticum, Heracleum sibiricum, Eryngium planum, Angelica silvestris. The period of time of flowering lasts 3-5 weeks. Both bisexual and male flowers were found in the inflorescences. The number of flowers produced by a single plant were as follows: Pastinaca sativa 5390-6354, Angelica silvestris 3408-4944, Chaerophyllum aromaticum 3972-4532, Anthriscus silvestris 3438-4374, Aegopodium podagraria 1915-2033, Heracleum sibiricum 1626-1908, Eryngium planum 1185-1420.
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