Guide to Liverworts of Oregon: Key to Calypogeia 4
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Calypogeia 1b oil bodies colorless > Calypogeia 2a underleaves bifid > Calypogeia 3b less than 2.5 mm wide > Calypogeia 4
Left: 44 mi NNW of Fairbanks, Alaska. DHW m2583a. Right: S. Santiam R., Linn Co., Oregon. DHW m1277a
4a Cells fairly large, 32-45 x 48-60 μm in middle of mature leaves; shoots from 1.5 to 2.4 mm wide; underleaves with widely spreading lobes, these often angled or toothed on the lateral margins; frequently on soil, sometimes on organic substrate; common and widespread
Calypogeia shevockii
Calypogeia sphagnicola White Rock Fen, Linn Co., Oregon. DHW m1682a.
4b Cells small, in mid-leaf mostly less than 50 μm long; shoots smaller, 1.2 to 1.8 mm wide; lobes of underleaves not spreading, rarely toothed or angled; almost always on Sphagnum, occasionally on rotting wood; uncommon
(Couplet 5)