Maintenance of Species Differences in Closely Related Tetraploid Parasitic (Orobanchaceae) on an Isolated Island.

Polyploidy is pervasive in angiosperm evolution and plays important roles in adaptation and speciation. However, polyploid groups are understudied due to complex sequence homology, challenging genome assembly, and taxonomic complexity. Here, we study adaptive divergence in taxonomically complex eyebrights (), where recent divergence, phenotypic plasticity, and hybridization blur species boundaries.

Dermatitis herpetiformis presenting as chronic urticaria.

Childhood dermatitis herpetiformis (DH) is an immunobullous disease associated with gluten-sensitive enteropathy. This disease is rare in children and is typically characterized by intensely pruritic vesicles on the extensor surfaces. Definitive diagnosis of DH depends on the direct immunofluorescence finding of granular or fibrillar IgA deposits along the basement membrane zone of biopsied perilesional skin.