Breutelia is a genus of mosses in the family Bartramiaceae (class Bryopsida, division Bryophyta), comprising approximately 94–125 species worldwide. The genus is especially diverse in temperate regions of the Southern Hemisphere. Plants are medium-sized to large, densely tufted, and range in colour from yellow and glaucous green to blackish. Stems are red to reddish purple, simple or sparingly branched, and tomentose in the lower half. Leaves are unranked, imbricate, erect to squarrose, ovate-lanceolate to narrowly lanceolate with an acuminate apex. Leaf margins are denticulate to serrate, and the costa is strong, percurrent to long-excurrent. A key diagnostic feature is the denticulate margin visible in stem cross-section, which together with plicate leaves distinguishes Breutelia from other Bartramiaceae genera. Laminal cells bear a single papilla. Capsules are inclined to horizontal, cylindrical when dry and ovoid when moist, with a double peristome. The genus is dioicous. The type species is Breutelia arcuata, and the genus was named in honour of German bryologist Johann Christian Breutel (1788–1875).
Etymology
The genus Breutelia was named in honour of Johann Christian Breutel (1788–1875), a German bryologist. The name was established by Wilhelm Philipp Schimper when he elevated Bartramia sect. Breutelia to genus rank in 1856.
Distribution
Breutelia has a worldwide distribution and is especially diverse in temperate regions of the Southern Hemisphere. In Australia, five taxa are documented across southeastern states (WA, SA, Qld, NSW, ACT, Vic, Tas), with B. affinis being the most widespread. Several species also occur in New Zealand and on Subantarctic islands including Macquarie Island, the Auckland Islands, and Campbell Island.
Ecology
Breutelia species grow on rocks and soil in permanently or occasionally moist conditions, often at higher elevations. They can form very large mats covering rock faces. B. elongata is frequently found growing in association with Sphagnum in very moist habitats. The genus shows ecological amplitude from lowland to subalpine environments, with Breutelia sp. A known only from elevations above 1260 m in eastern New South Wales.
Taxonomy
Breutelia was originally described as Bartramia sect. Breutelia by Bruch and Schimper in 1851 and elevated to genus rank by Schimper in 1856 (Coroll. Bryol. Eur. 85). The type species is B. arcuata (Sw.) Schimp. The genus is dioicous. Key diagnostic features include a denticulate stem cross-section margin and plicate leaves, which distinguish it from other Bartramiaceae. The number of species is variously reported as 94 or approximately 125, reflecting ongoing taxonomic revision.
