Guide to Liverworts of Oregon: Cephaloziella rubella (Nees) Warnst.
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Synonym: None.
Special Status: None.
Recognition: Small plants with bilobed leaves, leaf lobes triangular, only 4-6 cells wide at lobe base. No underleaves on sterile stems.
Distribution: On a variety of terrestrial habitats, including on peat in wetlands, rarely on wood or trees, at all elevations. Probably all over the state; a circumboreal species.
Comments: Of all the species of Cephaloziella, C. rubella has the most confusing nomenclatural history. There is a welter of named forms which may or may not have taxonomic validity. Their sexuality may be labile within a single collection, so whether or not a plant is autoicous, paroicous or heteroicous is not a consistently reliable character. The complete absence of underleaves on normal shoots is shared with C. hampaeana, from which C. rubella differs in having smaller, patent, slightly incurved leaves rather than having leaves spreading nearly straight out from the stem.
Cephaloziella rubella, Bull Swamp, Klamath Co., Oregon. DHW 8993a
Cephaloziella rubella. Alaska. Potemkin 9205302 (ALA).