Kongel. Norske Vidensk. Selsk. Skr. (Trondheim)1914: 109. 1915 ,
North America, South America, Europe, Asia.
Species ca. 6 (4 in the flora).
A northern and alpine genus, Kiaeria occurs on siliceous rock or soil and is recognized by its medium-sized, Dicranum-like habit, with poorly differentiated stereid and guide cells. It may be confused with several other tufted acrocarps of similar size, such as Dicranoweisia, which has crisped, contorted leaves when dry; Oncophorus, which has distinctly strumose capsules and occurs on wood or humus; or Dicranella, which differs in its obliquely grooved capsules, and narrow hairlike leaves. The species in Kiaeria are difficult to distinguish, but some characters are useful for tentative field identification, including presence of grooves on capsule, leaf luster, growth form, and habitat.
|1||Distal laminal cells elongate; capsule ribbed or grooved when dry||> 2|
|1||Distal laminal cells short, rectangular or quadrate; capsule smooth when dry||> 3|
|2||Distal laminal cells not porose, basal laminal cells occasionally porose.||Kiaeria starkei|
|2||Distal and basal laminal cells porose.||Kiaeria glacialis|
|3||Plants in loose tufts; leaves erect-spreading, flexuose.||Kiaeria blyttii|
|3||Plants in dense tufts; leaves falcate-secund.||Kiaeria falcata|