Calypogeia

Phylum: Marchantiophyta

Order: Jungermanniales

Family: Calypogeiaceae

Genus: Calypogeia

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1a. Oil bodies distinctly deep blue C. azurea

1b. Oil bodies colourless or hyaline to slightly greyish 2

2a. Underleaves undivided or shallowly (< 1/4 leaf length) divided into 2 lobes 3

2b. Underleaves deeply (> 1/2 leaf length) divided into 2 lobes 4

3a. Underleaves broadly orbicular, ca. 1.2-1.5x as wide as long, 2-3x wider than the stem; shoots 1.5-3 mm wide; leaf cells 35-45 x 40-60 µm in middle of leaf; rhizoid-initial area distinct; border of elongate cells indistinct C. integristipula

3b. Underleaves orbicular, about as wide as long, 2-2.5x wider than the stem; shoots 0.7-1.8 mm wide; leaf cells 30-40 x 35-45 µm in middle of leaf; rhizoid-initial area indistinct; border of elongate cells very distinct C. neesiana

4a. Shoots usually < 1 mm wide; leaf cells small (< 30 µm in apices, 25-35 x 30-45 µm at mid-leaf); underleaves 2-3.5x wider than the stem 5

4b. Shoots usually > 1 mm wide; leaf cells large (> 30 µm in apices, 35-50 x 45-75 µm at mid-leaf); underleaves 1-2x wider than the stem 6

5a. Leaf cells 20-30 x 25-40 µm in mid-leaf, thin-walled; underleaves slightly longer than wide, ca. 1.2-2x wider than stem, bilobed to 0.6-0.8x leaf length; plants growing on Sphagnum C. sphagnicola

5b. Leaf cells 25-30 x 30-35 µm in mid-leaf, isodiametric, collenchymatous; underleaves ca. 1.5x longer than wide, ca. 2-3.5x wider than stem, bilobed to 0.4-0.6x leaf length; plants on decayed wood C. suecica

6a. Underleaves with lobe apices bidentate or sharply pointed, ca. 1.5-2x wider than long, ca. 1.5-2x wider than the stem C. fissa

6b. Underleaves with lobes narrowly rounded at apices, ca. 1-1.5x wider than long, ca. 2-2.5x wider than the stem 7

7a. Leaf cells ca. 40-50 x 40-70 µm in middle; lobes of underleaves obtuse-rounded; oil bodies colourless C. muelleriana

7b. Leaf cells ca. 30-40 x 35-45 µm in middle; lobes of underleaves acute-subacute; oil bodies blue (in fresh material) C. azurea

Godfrey, J.D. (1977). Hepaticae and Anthocerotae of southwestern British Columbia . [Doctoral dissertation, University of British Columbia]. UBC cIRcle.
Hong, W. S. (2007). Scapania. In Flora of North America Editorial Committee (Eds.), Flora of North America North of Mexico (Vol. 3) . Oxford University Press.
Wagner, D. H. (2013). Guide to the liverworts of Oregon: Scapania undulata . Oregon State University Herbarium.