Clusterspike False Indigo vs Common Figwort

Amorpha crenulata compared with Scrophularia nodosa

Key Differences

• Clusterspike False Indigo is Critically Endangered while Common Figwort is Least Concern.

Taxonomic Classification

Rank	Clusterspike False Indigo	Common Figwort
Kingdom same	Plantae (Plants)	Plantae (Plants)
Phylum same	Magnoliophyta (Flowering Plants)	Magnoliophyta (Flowering Plants)
Class same	Magnoliopsida (Dicots)	Magnoliopsida (Dicots)
Order	Fabales (Legumes & Allies)	Lamiales (Lamiales)
Family	Fabaceae	Scrophulariaceae
Genus	Amorpha	Scrophularia
Species	Amorpha crenulata	Scrophularia nodosa

Evolutionary Relationship

Clusterspike False Indigo and Common Figwort share a common ancestor at the Class level: Magnoliopsida. (Dicots)

Conservation Status

Clusterspike False Indigo

CR — Critically Endangered

Common Figwort

LC — Least Concern

Physical Characteristics

Attribute	Clusterspike False Indigo	Common Figwort
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Clusterspike False Indigo

Habitat

Typically found in diverse terrestrial habitats from tropical forests to temperate regions.

Common Figwort

Habitat

Typically found in diverse terrestrial habitats from tropical forests to temperate regions.

Range

Widely distributed across Europe (5 countries), North America (Canada, United States), and Oceania and the Pacific (Australia).

Clusterspike False Indigo

Amorpha crenulata, known as clusterspike false indigo or crenulate lead plant, is a critically endangered flowering shrub in the family Fabaceae with a highly restricted distribution confined to Miami-Dade County in southern Florida, USA. This species represents one of North America's rarest plants, with remaining populations numbering in the hundreds of individuals occurring in pine rockland habitat, an ecosystem itself ranked among the most imperiled in the United States. Pine rocklands are fire-dependent communities on exposed oolitic limestone, characterized by an open canopy of slash pine over diverse understory, and have been reduced to less than two percent of their historical extent by urban development in the Miami metropolitan area. Amorpha crenulata produces elongated spikes of small purple flowers typical of the genus and was historically more widespread across the Miami Rock Ridge before land development eliminated most habitat. Current populations exist primarily within Everglades National Park and a few private preserves. Its Critically Endangered status reflects the tiny remaining population, extreme habitat restriction, ongoing threats from urbanization, altered fire regimes, and sea-level rise that threatens low-elevation limestone habitats. Conservation efforts focus on habitat protection, controlled burning to maintain pine rockland structure, and ex situ seed banking.

Common Figwort

<em>Scrophularia nodosa</em> is a herbaceous perennial plant belonging to the family Scrophulariaceae within the order Lamiales. Commonly known as common figwort, this species typically inhabits shaded, moist environments such as woodland edges, hedgerows, riverbanks, and disturbed ground rich in organic matter. It is classified as Least Concern on the IUCN Red List, reflecting widespread distribution and stable population status. <em>Scrophularia nodosa</em> has a broad geographic range encompassing much of Europe, as well as introduced or naturalized populations in Canada, the United States, and Australia. The plant typically produces erect, quadrangular stems reaching up to one meter in height, with opposite, toothed leaves and small brownish-maroon tubular flowers arranged in loose panicles. These flowers are notably attractive to wasps and bumblebees, which serve as primary pollinators. Historically, the species has been used in traditional medicine across its native range. Biological traits of this species remain poorly documented in the scientific literature.