× Argyrautia degeneri

× Argyrautia degeneri is a nothospecies (hybrid) in the family Asteraceae, representing one of Hawaii's rare endemic composite plants. The genus Argyrautia is restricted to the Hawaiian archipelago, placing this taxon among the highly specialized flora that evolved in geographic isolation across the Pacific Ocean. As a hybrid taxon (indicated by the '×' prefix), it arises from crosses between parental Argyrautia lineages and may exhibit intermediate morphological characteristics between its progenitor species. Hawaiian Asteraceae members in this group typically produce small discoid or radiate flower heads, often arranged in branched inflorescences, with leaves that may be alternate and variously toothed or lobed. Achenes are typically slender, topped with a pappus of bristles or scales aiding wind dispersal. The genus belongs to a lineage of composites that colonized Hawaii from continental ancestors and subsequently diversified through adaptive radiation, a process that generated considerable endemic diversity across the islands. Habitat for Hawaiian Asteraceae in this alliance generally includes mesic to dry forest understories, shrublands, and disturbed margins at low to mid elevations. Like many Hawaiian endemic plants, this taxon faces pressures from habitat conversion, invasive alien species, and feral ungulate browsing. Conservation status data for this hybrid nothospecies may be limited given its taxonomic complexity and potentially restricted natural occurrence. Botanical documentation of Argyrautia degeneri honors the legacy of Otto Degener, a prominent botanical collector who contributed extensively to documenting Hawaiian flora throughout the twentieth century.