Identification notes
One of several really small hyper-oceanic Lejeuneaceae – the others are Cololejeunea microscopica and Harpalejeunea molleri. All of these are considerably smaller than the related species – especially Lejeunea lamacerina and L. patens – that they often grow mixed with in humid wooded ravines. D. hamatifolia is more likely than C. microscopica and H. molleri to be found in more open places, such as on the bark of willow in small streams on north-facing hillsides where mist or cloud linger. It may be responding to changing weather patterns by moving into drier areas.
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