PlantaeDB Logo
Login Sign-up

Genus Mosla in Family Lamiaceae

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).

Do you wish to read more about plant taxonomy? Click here!

Genus Description

Suggest a correction!

Mosla (Lamiaceae) is a small genus of aromatic herbs comprising about 30 accepted species that range from southern China and Taiwan to northern Vietnam, the Philippines and parts of the Himalayas (POWO, 2024; WFO, 2024). The type species remains unsettled in recent treatments, as no formal designation has been published.

Morphologically, members are herbaceous perennials with quadrangular, often glandular stems bearing opposite, simple leaves that may be entire or shallowly serrate. Inflorescences are compact terminal spikes or panicles of small, bilabiate corollas; the calyx is five‑lobed and slightly zygomorphic, and the ovary is four‑lobed, maturing into four nutlets. The foliage is aromatic due to glandular trichomes, a diagnostic trait that separates Mosla from closely related genera within the subtribe Menthinae.

Diversity peaks in the mountainous regions of southwestern China and northern Vietnam, where many narrow‑endemic taxa occupy limestone outcrops or forest margins at elevations up to 2 500 m. A few species such as Mosla chinensis extend to Taiwan and the Philippines, illustrating the typical Sino‑Japanese to Malesian distribution pattern.

Reproductive biology follows the mint‑family pattern: entomophilous pollination by bees and hoverflies (Li & Zhang, 2021). Nutlet dispersal appears largely anemochorous, with occasional reports of myrmecochory. The base chromosome number for Mosla is x = 10, and most populations have 2n = 20 (Li & Zhang, 2021).

Phylogenetic analyses place Mosla within the Mentha clade, sister to Clinopodium (Dreyer et al., 2022). Recent taxonomic treatments diverge: Harley & Suddee (2023) propose a broad Clinopodium concept that would transfer all Mosla species, while Li & Zhang (2021) retain Mosla as a distinct genus based on morphological coherence and molecular support. No formal sectional classification has gained widespread acceptance, reflecting ongoing taxonomic uncertainty.

Several species are cultivated for their fragrant foliage in East Asian horticulture and occasionally for ornamental borders; none are major food or timber crops. Although some taxa can naturalize outside their native range, they are not documented as aggressive invasives.

Conservation concerns arise from habitat loss and over‑collection, and many narrow endemics lack formal assessments. Continued field surveys and integrative taxonomic revisions are needed to clarify species limits and inform management strategies. The growing interest in aromatic ornamentals may foster ex situ cultivation, potentially aiding conservation of threatened taxa.

Pick a Species to see its components: