Blue Cycad vs Clusterspike False Indigo

Encephalartos nubimontanus compared with Amorpha crenulata

Key Differences

• Blue Cycad is Extinct in the Wild while Clusterspike False Indigo is Critically Endangered.

Taxonomic Classification

Rank	Blue Cycad	Clusterspike False Indigo
Kingdom same	Plantae (Plants)	Plantae (Plants)
Phylum	Tracheophyta	Magnoliophyta (Flowering Plants)
Class	Cycadopsida (Cycadopsida)	Magnoliopsida (Dicots)
Order	Cycadales (Cycadales)	Fabales (Legumes & Allies)
Family	Zamiaceae	Fabaceae
Genus	Encephalartos	Amorpha
Species	Encephalartos nubimontanus	Amorpha crenulata

Evolutionary Relationship

Blue Cycad and Clusterspike False Indigo share a common ancestor at the Kingdom level: Plantae. (Plants)

Conservation Status

Blue Cycad

EW — Extinct in the Wild

Clusterspike False Indigo

CR — Critically Endangered

Physical Characteristics

Attribute	Blue Cycad	Clusterspike False Indigo
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Blue Cycad

Clusterspike False Indigo

Habitat

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

Blue Cycad

The Blue Cycad (Encephalartos nubimontanus) is a species in the genus Encephalartos. It is currently classified as Extinct in the Wild on the IUCN Red List. As a member of the genus Encephalartos, it shares ecological traits with closely related species.

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.