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Conium
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=== Flowers === Terminal inflorescences are made up of many small flowers, colored white, yellow, or green depending on the species. The flowers are grouped together in umbrella shaped umbels. Plants in the genus ''Conium'' have compound umbels, with multiple dome shaped clusters branching out from a central point. Flowers are around 2 mm across, and the umbrella shaped umbels range from 1β8 cm in diameter.<ref name=":3" /> ==== Fruits ==== The two seeded fruit is one of the most significant distinguishing factors between species. They are relatively round, slightly flattened, and dark green or brown. Depending on the species, they range from 2.5 to 4 mm long. Some species have distinctive light brown ribs, some have ribs that are noticeably crenulate (scalloped edges), and others show relatively unpronounced rib patterns.<ref name=":5">{{Cite journal|date=2017-01-01|title=Mzansi's mountain hemlocks: The identities of Hilliard and Burtt's Conium species 3 and 4 (Apiaceae) and a revised key for the genus in sub-Saharan Africa|journal=South African Journal of Botany|language=en|volume=108|pages=243β247|doi=10.1016/j.sajb.2016.11.006|issn=0254-6299|last1=Magee|first1=A.R.|last2=Clark|first2=V.R.|doi-access=free|bibcode=2017SAJB..108..243M }}</ref> ==== Seeds ==== Each plant typically produces between 1,700 and 39,000 seeds, and 40-85% will germinate in suitable conditions. However, seeds will remain viable for 3 to 6 years after dispersal. Producing a large number of seeds, and growing in a variety of locations, these plants can be considered invasive in some cases.<ref name=":3" />
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