Guide to Liverworts of Oregon: Key to Genera 81
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1a plants thallose > 2b chloroplasts numerous > 62b thallus tissue complex > 70b terrestrial > 72b pores differentiated > 73b gemmae absent > 75b trigones small or absent > 77b pores not stellate > 79b pores simple > 81
Conocephalum conicum, Lincoln County, Oregon.)
81a Thallus large, 8-20 mm (or more) wide; upper surface with coarse, polygonal areolation evident
at arm's length ("alligator skin" pattern ); common
Conocephalum conicum
Asterella bolanderi - Wagontire Rock, Monterey Co., California. DHW m1230b.
81b Thallus small to medium sized, mostly less than 8 mm wide; areolation inconspicuous without lens.
(Couplet 82)