Clusterspike False Indigo vs common sea-lavender

Amorpha crenulata compared with Limonium vulgare

Key Differences

• Clusterspike False Indigo is Critically Endangered while common sea-lavender is Endangered.

Taxonomic Classification

Rank	Clusterspike False Indigo	common sea-lavender
Kingdom same	Plantae (Plants)	Plantae (Plants)
Phylum same	Magnoliophyta (Flowering Plants)	Magnoliophyta (Flowering Plants)
Class same	Magnoliopsida (Dicots)	Magnoliopsida (Dicots)
Order	Fabales (Legumes & Allies)	Caryophyllales (Caryophyllales)
Family	Fabaceae	Plumbaginaceae
Genus	Amorpha	Limonium
Species	Amorpha crenulata	Limonium vulgare

Evolutionary Relationship

Clusterspike False Indigo and common sea-lavender share a common ancestor at the Class level: Magnoliopsida. (Dicots)

Conservation Status

Clusterspike False Indigo

CR — Critically Endangered

common sea-lavender

EN — Endangered

Physical Characteristics

Attribute	Clusterspike False Indigo	common sea-lavender
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 sea-lavender

Habitat

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

Range

Found across Europe (5 countries) and North America (Canada, United States). Currently classified as Endangered on the IUCN Red List, this species faces significant conservation challenges across its range.

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 sea-lavender

<em>Limonium vulgare</em>, the common sea lavender, is a perennial halophytic plant in the family Plumbaginaceae, order Caryophyllales, native to saltmarshes and coastal mudflats of Europe and North America. This species is a characteristic component of mid-marsh vegetation zones, thriving in the periodically inundated, saline soils of estuaries and tidal flats. It produces dense clusters of small, lilac-purple flowers on branching stems from late summer onward, providing an important nectar source for pollinators. Critically, <em>Limonium vulgare</em> is classified as Endangered by the IUCN, reflecting severe population declines driven by saltmarsh loss, coastal development, sea-level rise, and agricultural conversion of intertidal habitats. Its restricted habitat specificity makes it particularly vulnerable to coastal modification. Conservation efforts for this species focus on protecting and restoring saltmarsh ecosystems across its declining range. Biological traits for this species remain poorly documented in the scientific literature, including comprehensive quantitative data on individual lifespan, precise plant dimensions, and dietary ecology, though its photosynthetic, halophytic strategy and pollinator relationships are recognized aspects of its biology.