Status: Native
Synonyms:
Only subspecific taxa
Grimmia sessitana looks similar to many other Grimmias. It has a mostly
bistratose distal lamina, hairpoints and the seta inserts centrally into the capsule
which has stomata. An interesting distinguishing feature is seen well only on leaf
cross section-- the lamina is unistratose in one or two rows medially at the costa above
the base.
Many thanks to the University of Colorado Herbarium (COLO), Erin Tripp & Dina Clark for permitting us
to photograph this specimen.
Please click on an image for a larger file.
Grimmia sessitana, collection and ID by Weber, Miller & Wittmann, Colorado, Clear Creek County, Arapaho National Forest, Mount Evans, Summit Lake, 12,900 feet elevation, August 2, 2005; photos by Russ Kleinman, Karen Blisard, Kelly Allred, Stacey Anderson & Ron Wittmann, January 19, 2023
Grimmia sessitana, photomicrograph of leaf, collection and ID by Weber, Miller & Wittmann, Colorado, Clear Creek County, Arapaho National Forest, Mount Evans, Summit Lake, 12,900 feet elevation, August 2, 2005; photos by Russ Kleinman, Karen Blisard, Kelly Allred, Stacey Anderson & Ron Wittmann, January 19, 2023
Grimmia sessitana, photomicrograph of leaf apex, collection and ID by Weber, Miller & Wittmann, Colorado, Clear Creek County, Arapaho National Forest, Mount Evans, Summit Lake, 12,900 feet elevation, August 2, 2005; photos by Russ Kleinman, Karen Blisard, Kelly Allred, Stacey Anderson & Ron Wittmann, January 19, 2023
Grimmia sessitana, photomicrograph of leaf base, collection and ID by Weber, Miller & Wittmann, Colorado, Clear Creek County, Arapaho National Forest, Mount Evans, Summit Lake, 12,900 feet elevation, August 2, 2005; photos by Russ Kleinman, Karen Blisard, Kelly Allred, Stacey Anderson & Ron Wittmann, January 19, 2023
Grimmia sessitana, photomicrograph of mid-leaf, collection and ID by Weber, Miller & Wittmann, Colorado, Clear Creek County, Arapaho National Forest, Mount Evans, Summit Lake, 12,900 feet elevation, August 2, 2005; photos by Russ Kleinman, Karen Blisard, Kelly Allred, Stacey Anderson & Ron Wittmann, January 19, 2023
Grimmia sessitana, photomicrograph of marginal cells at leaf base with thick transverse walls, collection and ID by Weber, Miller & Wittmann, Colorado, Clear Creek County, Arapaho National Forest, Mount Evans, Summit Lake, 12,900 feet elevation, August 2, 2005; photos by Russ Kleinman, Karen Blisard, Kelly Allred, Stacey Anderson & Ron Wittmann, January 19, 2023
Grimmia sessitana, photomicrograph of cells at midleaf, collection and ID by Weber, Miller & Wittmann, Colorado, Clear Creek County, Arapaho National Forest, Mount Evans, Summit Lake, 12,900 feet elevation, August 2, 2005; photos by Russ Kleinman, Karen Blisard, Kelly Allred, Stacey Anderson & Ron Wittmann, January 19, 2023
Grimmia sessitana, photomicrograph of leaf cross section, collection and ID by Weber, Miller & Wittmann, Colorado, Clear Creek County, Arapaho National Forest, Mount Evans, Summit Lake, 12,900 feet elevation, August 2, 2005; photos by Russ Kleinman, Karen Blisard, Kelly Allred, Stacey Anderson & Ron Wittmann, January 19, 2023
Grimmia sessitana, photomicrograph of leaf cross section, collection and ID by Weber, Miller & Wittmann, Colorado, Clear Creek County, Arapaho National Forest, Mount Evans, Summit Lake, 12,900 feet elevation, August 2, 2005; photos by Russ Kleinman, Karen Blisard, Kelly Allred, Stacey Anderson & Ron Wittmann, January 19, 2023
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