Magnoliids
A clade of flowering plants with over 10,000 species.
Magnoliids, also known as Magnoliidae or Magnolianae, are a clade of flowering plants comprising more than 10,000 species, including magnolias, nutmeg, bay laurel, cinnamon, avocado, black pepper, and tulip tree. They are the third-largest group of angiosperms after eudicots and monocots, characterized by trimerous flowers, pollen with one pore, and usually branching-veined leaves. Some members are among the earliest angiosperms and share anatomical similarities with gymnosperms, such as stamens resembling male cone scales of conifers and carpels on a long flowering axis. According to molecular clock calculations, the lineage leading to magnoliids split from other plants about 140–150 million years ago.
- field
- Botany
- known_for
- Third-largest group of flowering plants; includes many economically important species such as avocado, black pepper, cinnamon, and nutmeg
- species_count
- More than 10,000
- key_orders
- Canellales, Laurales, Magnoliales, Piperales
Lore & Background
The classification of magnoliids has been subject to varying taxonomic systems. The name 'Magnoliidae' is a botanical subclass name, while 'magnoliids' is an informal name not conforming to the International Code of Nomenclature for algae, fungi, and plants. The circumscription of a subclass varies with the taxonomic system, but it must include the family Magnoliaceae. Under the PhyloCode, the group has been redefined as a node-based clade comprising the orders Canellales, Laurales, Magnoliales, and Piperales. Chase & Reveal proposed 'Magnoliidae' as the name for all flowering plants, with 'Magnolianae' for the four orders.
Reader's Guide
The magnoliids are significant as a major clade of angiosperms, representing an early divergence in flowering plant evolution. Their economic importance is vast: the avocado (Persea americana) has been cultivated for nearly 10,000 years in Mexico and Central America, and species of Annona such as custard-apple, soursop, sweetsop, and cherimoya were also domesticated there. Spices like black pepper, nutmeg, bay laurel, and cinnamon are magnoliids. Some members produce compounds with narcotic, hallucinogenic, or paralytic properties, such as kava from Piper methysticum, hallucinogenic snuff from Virola trees, and arrow poison from Chlorocardium venenosum. Others have medicinal uses: Winter's Bark from Drimys winteri was used against scurvy, benzoyl from Lindera benzoin serves as a food additive and skin medicine, and magnolol and honokiol from Magnolia bark show antibacterial activity against dental caries. Acetogenins from Annonaceae have anti-leukemic, anti-malarial, anti-tumor, and anti-HIV properties in laboratory studies. The classification of magnoliids remains complex, with different systems (APG, Cronquist, Dahlgren, Thorne) placing the group at varying ranks and with differing circumscriptions.
Did You Know?
- The lineage leading to magnoliids split from other plants about 140–150 million years ago.
- Safrole from Sassafras albidum or Ocotea pretiosa is the primary precursor for synthesis of MDMA (ecstasy).
- The Polynesian beverage kava, made from Piper methysticum, has both sedative and narcotic properties.
- The first acetogenin discovered, uvaricin, has anti-leukemic properties in living organisms.
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