Scrophulariaceae: the figwort family

Key characteristics

• Habit: mostly herbaceous perennials and annuals, occasionally subshrubs; rarely woody.
• Leaves: simple, usually entire or toothed, arranged opposite or alternate.
• Flowers: typically zygomorphic (bilaterally symmetrical) and often two-lipped (bilabiate); corolla frequently tubular and fused.
• Reproductive features: stamens commonly two or four (sometimes didynamous), ovary superior, fruit most often a dry capsule releasing multiple seeds.

Taxonomy and history

Up through the 20th century, Scrophulariaceae was treated as a large, heterogeneous family of several hundred genera. Beginning in the late 20th and early 21st centuries, DNA-sequence studies showed that this broad circumscription was polyphyletic: many genera were more closely related to plants placed in other families. As a result, several well-known groups were reassigned to families such as Plantaginaceae, Orobanchaceae and Phrymaceae, leaving a more narrowly defined Scrophulariaceae. The precise limits of the family today vary with different taxonomic treatments and floras.

Uses, ecology and distribution

Members of the figwort assemblage occur worldwide but are most diverse in temperate regions of the Northern Hemisphere. Many species are ecologically important in grassland and woodland habitats. Historically the family included ornamental plants cultivated for their flowers, and several species have traditional medicinal uses—Scrophularia species, for example, were used in folk remedies. Some genera that were once placed here include important parasitic plants that are now treated in other families.

Notable facts and distinctions

• The family name honors the genus Scrophularia; the common name "figwort" reflects historical medicinal use for treating scrofula and related conditions.
• Molecular phylogenetics dramatically reshaped the family's composition, illustrating how genetic data can overturn long-standing classifications based on morphology alone.
• Gardeners and botanists may still encounter older references that list many familiar genera under Scrophulariaceae; modern checklists and floras should be consulted for current placement.

For general reference and further reading, see additional resources on Scrophulariaceae.