Comprehensive DescriptionRead full entry
3. Atractylocarpus Mitt.Journ. Linn. Soc. London Bot.12 : 71 . 1869 .
Differing from Campylopus mainly in the linear, upper leaf cells and the straight seta and capsule.
Type species: A. mexicanus Mitt.
Atractylocarpus longisetus (Hook.) Bartr. Bryologist 49: 110. 1946.
Dicranum longisetum Hook. Musci Exot.139 . 1819 .
Type specimen: Humboldt & Bonpland, Colombia (K).
This species has been collected once by McConnell & Quelch on Mount Roraima, British Guiana (343, K). The long, erect seta and the linear, upper leaf cells separate it well from other Guiana Dicranaceae. No. 344 has been described as var. laxifolium Broth. ( Dicranum longisetum var. laxifolium Broth. Trans. Linn. Soc. London Bot. ser. 2.6: 88. 1901) but the differences: laxly foliate stems with leaves more strongly senate near apex, do not seem sufficient to warrant its segregation.