Revision as of 06:03, 30 July 2020 by imported>Volume Importer
Protonema persistent as a thick green adherent felt. Leaves with strongly bordered and serrulate margins, distal laminal cell strongly bulging, papillae centered over lumens, mucro strongly denticulate. Capsule exothecial cells rectangular, 4–5: 1, mostly ca. 13–18 µm wide. Spores 18–20 µm, weakly ornamented.
Phenology: Capsules mature Apr.
Habitat: Usually under translucent rocks in exposed situations
Elevation: moderate elevations
Discussion
Of conservation concern.
Aschisma kansanum is endemic to the United States, being restricted to High Plains grassland (Gary L. Smith 1990) in three counties in west-central Kansas. Its persistent protonema and habitat are distinctive. This tiny, very rare species is threatened by over-collecting and grazing.
Selected References
None.
Lower Taxa
None.
... more about "Aschisma kansanum"
absent +
lacking +
differentiated +
elongate +
absent +
absent +
channeled +
revoluble +
deciduous +
absent +
rounded-acute +
blunt +
small +
elliptical +
absent +
thick-walled +
1;3;5 +
rectangular +
differentiated +
wider +
differentiated +
usually slightly wider +
trabeculate +
absent +
differentiated +
obovoid +
papillose +
short-triangular +
yellowish-brown +
spheric +
0.3 cm3 mm <br />0.003 m <br /> (?) +
specialized +
absent +
bulging +
thickened +
brownish +
elongate +
absent +
excurrent +
denticulate +
2-stratose +
stacked +
9mm;16mm +
bordered +
recurved +
plane +
quadrate +
Kans. +
spiculose +
filiform +
differentiated +
rectangular +
multicellular +
uncommon +
asexual +
absent +
absent +
Present +
not sheathing +
long-elliptic +
contorted +
appressed +
spreading +
concave;keeled;channeled;ovoid;lanceolate or lingulate +
tubulose +
fragile +
bordered +
serrulate +
incurved +
higher +
plane +
involute +
denticulate +
absent +
absent +
short-conic;short-rostrate +
photosynthetic +
absent +
2-fid +
sheathing +
long-oval +
usually larger +
absent +
twisted +
absent +
persistent +
Torreya +
absent +
straight +
oblique +
2;4 +
papillose +
absent +
differentiated +
twisted +
hyaline +
straight +
elongate +
50 cm500 mm <br />0.5 m <br /> (?) +
2 times 0.2-0.3 mm rough +
larger +
branching +
sheathing +
rounded-pentagonal +
0.2 cm2 mm <br />0.002 m <br /> (?) +
exposed +
Aschisma kansanum +
Aschisma +
species +
ovoid;cylindric +
small +