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Genus Lepidozia in Family Lepidoziaceae

In botanical taxonomy, a genus (plural genera) is a rank used to group closely related species within a family. In the hierarchy, genus sits below family and above species.

Genera are defined by shared morphological, anatomical, and genetic characteristics (for example, features of flowers, fruits, seeds, or leaves) that indicate a close evolutionary relationship among the species they contain.

Each genus can include one or more species. Examples include Rosa (roses) and Solanum (nightshades, including tomato and eggplant).

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Genus Description

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Lepidozia (Dumort.) Dumort. is a cosmopolitan leafy liverwort genus in the family Lepidoziaceae. Approximately 250 species are recognized worldwide (Söderström et al., 2022; WFO, 2024). The type species is Lepidozia reptans (L.) Dumort. (Long & Crandall‑Stotler, 2020).

The plants form dense mats with incubously attached leaves that are typically three‑lobed, the lateral lobes exceeding the median one. Leaves bear a ventral keel and often a row of marginal papillae; underleaves are generally present, bilobed and reduced, and the perianth is tubular with three to five keels. The capsule is spherical, borne on a long seta, and spores measure about ten to twenty micrometres (Long & Crandall‑Stotler, 2020).

Species richness peaks in the tropical montane forests of Southeast Asia, New Guinea, the Andes and the Himalayas, where many taxa are narrow endemics. A few taxa such as Lepidozia reptans extend into temperate Europe and North America, as recorded in WFO, 2024. Typical habitats include moist shaded bark, logs, rock crevices and soil in moss carpets from lowland to subalpine elevations, occasionally reaching 3 000 m.

Reproduction is hydrogamous, with sperm released into water and fertilizing eggs on the gametophyte; spores disperse by wind and water. Many populations reproduce asexually through fragmentation of the thallus. Chromosome counts from multiple lineages consistently give a base number of n = 9 (Krupová & Štech, 2020).

The genus occupies a basal position within Lepidoziaceae (Lepidoziales) and has historically been divided into sections such as Lepidozia sect. Lepidozia and sect. Holostipae. Molecular phylogenies (Dugas & Crandall‑Stotler, 2019) reveal that the traditional subgeneric boundaries are non‑monophyletic, prompting transfers of several species to the related genus Telaranea (Long & Crandall‑Stotler, 2020). Alternative treatments continue to employ a broad concept of Lepidozia sensu lato, with circumscription awaiting broader taxon sampling (WFO, 2024).

Some species are occasionally displayed in terrarium collections for their delicate, three‑lobed foliage, but none are cultivated on a commercial scale, and no Lepidozia taxa are used as timber, food crops, or medicinal plants. Their presence is not recorded as invasive.

Habitat loss from deforestation and climate‑induced elevation shifts threatens many narrow‑range endemics, and gaps in molecular phylogeny impede precise conservation assessments. Ongoing integrative research that combines morphology, DNA data, and ecology will be essential to safeguard Lepidozia diversity under future environmental change.

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