Clusterspike False Indigo vs

Amorpha crenulata compared with Pyrenula nitida

Key Differences

• Clusterspike False Indigo is Critically Endangered while is Endangered.

Taxonomic Classification

Rank	Clusterspike False Indigo
Kingdom	Plantae (植物)	Fungi (真菌界)
Phylum	Magnoliophyta (木兰植物门)	Ascomycota (子囊菌门)
Class	Magnoliopsida (木兰纲)	Eurotiomycetes (散囊菌綱)
Order	Fabales (豆目)	Pyrenulales (小核衣菌目)
Family	Fabaceae	Pyrenulaceae
Genus	Amorpha	Pyrenula
Species	Amorpha crenulata	Pyrenula nitida

Conservation Status

Clusterspike False Indigo

CR — Critically Endangered

EN — Endangered

Physical Characteristics

Attribute	Clusterspike False Indigo
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.

Habitat

Native to Europe and North America, inhabiting ecosystems characteristic of the region.

Range

Distributed across Denmark, Norway, Portugal, Sweden, and 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.

光亮座囊衣（Pyrenula nitida）是生长于西欧湿润大西洋林古老阔叶树光滑树皮上的树皮生壳状地衣，具光滑光泽的橄榄绿至褐色叶状体和嵌入的烧瓶形子囊壳。被视为西欧古老持续性森林的旗舰指示种。因古树和古老森林生境的丧失而受到严重威胁，属濒危地衣。