All Floras      Advanced Search
FNA Vol. 27 Page 638, 639 Login | eFloras Home | Help
FNA | Family List | FNA Vol. 27 | Pottiaceae | Acaulon

3. Acaulon muticum (Hedwig) Müller Hal., Bot. Zeitung (Berlin). 5: 99. 1847.

Phascum muticum Hedwig, Sp. Musc. Frond., 23. 1801

Plants elliptic to globose, ca. 2 mm. Stem leaves cuspidate, broadly channeled; laminal cells smooth. Seta short, about 0.3 the diameter of the capsule. Spores spheric to elliptic, 30-50 µm, papillose or nearly smooth.

Varieties 2 (2 in the flora): temperate areas of the Northern Hemisphere, Africa.

As H. A. Crum (1969) and A. J. Grout (1939) pointed out, American specimens reported as Acaulon rubrum are A. muticum var. rufescens. These plants are often small, rather three-sided and may be confused with A. triquetrum. The leaves of both varieties stain red, at least in blotches, in KOH, and they intergrade to some extent.

1 Plants yellow-brown in nature, spores papillose- punctulose   3a Acaulon muticum var. muticum
+ Plants yellow- to red-brown in nature, spores smooth or papillose-punctulate   3b Acaulon muticum var. rufescens

Lower Taxa


Related Objects  
  • Distribution Map
  • Map

     |  eFlora Home |  People Search  |  Help  |  ActKey  |  Hu Cards  |  Glossary  |