Clusterspike False Indigo vs Common Salsify

Amorpha crenulata compared with Tragopogon porrifolius

Key Differences

• Clusterspike False Indigo is Critically Endangered while Common Salsify is Not Evaluated.

Taxonomic Classification

Rank	Clusterspike False Indigo	Common Salsify
Kingdom same	Plantae (Plants)	Plantae (Plants)
Phylum same	Magnoliophyta (Flowering Plants)	Magnoliophyta (Flowering Plants)
Class same	Magnoliopsida (Dicots)	Magnoliopsida (Dicots)
Order	Fabales (Legumes & Allies)	Asterales (Daisies & Sunflowers)
Family	Fabaceae	Asteraceae (Daisy Family)
Genus	Amorpha	Tragopogon
Species	Amorpha crenulata	Tragopogon porrifolius

Evolutionary Relationship

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

Conservation Status

Clusterspike False Indigo

CR — Critically Endangered

Common Salsify

NE — Not Evaluated

Physical Characteristics

Attribute	Clusterspike False Indigo	Common Salsify
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 Salsify

Habitat

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

Range

Widely distributed across Asia (India, Japan, Taiwan), Europe (16 countries), North America (Canada, Mexico, United States), Oceania and the Pacific (Australia), and South America (Argentina, Chile).

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 Salsify

<em>Tragopogon porrifolius</em>, commonly known as common salsify, vegetable oyster, or purple salsify, is a biennial or perennial herbaceous plant in the family Asteraceae. Native to Mediterranean Europe and western Asia, it has been widely cultivated as a root vegetable since antiquity and has naturalized extensively across Europe, the Americas, Australia, and parts of Asia. The plant typically grows on roadsides, waste ground, dry grasslands, and disturbed soils in sunny locations. In its first year it produces a rosette of grass-like, grey-green leaves; in the second year it produces tall, branched stems bearing showy purple flower heads that resemble large dandelions, typically 5–7 centimeters in diameter. The edible taproot has a pale, somewhat oyster-like flavor when cooked, and the young shoots and flower buds are also edible. Common salsify is not currently evaluated on the IUCN Red List. Pollination is primarily by bees and other insects visiting the flowers, which open only in morning sunlight. Seeds are dispersed by wind via a feathery pappus. The species favors well-drained, moderately fertile soils and can be found in both rural and urban habitats. Biological traits such as average lifespan, body measurements, and detailed ecological diet data remain poorly documented in standardized ecological databases.