Show Lower Taxa
Acaulon muticum
Bot. Zeitung (Berlin) 5: 99. 1847,.
Basionym: 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.
Distribution
Temperate areas of the Northern Hemisphere, Africa
Discussion
Varieties 2 (2 in the flora).
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.
Selected References
None.
Key
| 1 | Plants yellow-brown in nature, spores papillose- punctulose | Acaulon muticum var. muticum |
| 1 | Plants yellow- to red-brown in nature, spores smooth or papillose-punctulate | Acaulon muticum var. rufescens |
... more about "Acaulon muticum"
absent +
differentiated +
elongate +
absent +
absent +
concave +
revoluble +
deciduous +
absent +
apiculate +
lacking +
sharp +
dentate +
weak +
absent +
rounded +
differentiated +
usually slightly wider +
trabeculate +
absent +
not differentiated +
obovoid +
papillose +
cleistocarpous +
spheric +
specialized +
absent +
bulging +
convex +
thickened +
brownish +
absent +
excurrent +
2-stratose +
stacked +
9mm;16mm +
recurved +
plane +
1-stratose +
roundedquadrate;rhomboid +
spiculose +
filiform +
central +
differentiated +
multicellular +
absent +
common +
asexual +
absent +
absent +
enlarged +
contorted +
appressed +
spreading +
concave;keeled;channeled;ovoid;lanceolate or lingulate +
ligulate +
fragile +
bordered +
recurved +
plane +
involute +
absent +
short-conic;short-rostrate +
photosynthetic +
simple +
absent +
large +
sheathing +
long-oval +
usually larger +
twisted +
absent +
thickened +
not differentiated +
Bot. Zeitung (Berlin) +
straight +
oblique +
3;4 +
absent +
twisted +
0.3 +
elongate +
larger +
cuspidate +
appressed +
channeled +
branching +
sheathing +
Acaulon muticum +
Acaulon +
species +
ovoid;cylindric +
thin +
perigoniate +
bulbiform +
scattered +
brown;reddish;yellowish-brown distally +
smaller +