Cephalozia macounii
Marchantiophyta
Cephalozia macounii (Cephaloziaceae)
Macoun’s Pincerwort
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Obscure
Distinguishing Features
A rare species forming tiny threads <<.5 mm across, C. macounii will need microscopic examination to identify (if not detect!). The bilobed leaves are the same width as the stem and divided more than half of their length, the lobes themselves only two cells wide. Under the microscope, the cells of C. macounii lack oil bodies.
Similar species
On tiny leaf and shoot size alone, this species could be mistaken for a Cephaloziella or Eremonotus, but species in those genera bear oil bodies in their leaf cells, while such oil bodies are lacking in C. macounii. Species of Fuscocephalozia have small, bilobed leaves, but lobes of these leaves more than two cells wide and the leaves themselves are attached along the stem such that their lower edge runs down the shoot ("decurrent"). Cephalozia ambigua and C. bicuspidata are larger species (>>.5 mm wide) and have leaves visibly wider than their stems.
Habitat
On logs
Associated species
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