Glossary

facultative biennial

A facultative biennial (fá-kul-tuh-tiv bye-én-ee-uhl) is a plant that does not always follow a strict two-year life cycle. It may complete its life cycle in one to two years or more, depending on site conditions.

Unlike strictly biennial plants, which grow vegetatively in the first year and flower in the second, facultative biennials adjust their timing based on moisture, light, or disturbance.

In native California habitats, plants like Madia (Madia elegans) may act as annuals in dry grasslands but behave as biennials in moister, partially shaded microsites. This adaptability allows them to persist across a broader range of ecological niches.

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