Guide to Liverworts of Oregon: Key to Asterella 4
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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 > 81b thallus mostly <8 mm wide > 82a receptacle conic > Asterella 1b sex organs on primary thallus > Asterella 2b monoicous; spores <100μm > Asterella 3b spores brown or purple > Asterella 4
Linton Meadows, Lane Co., Oregon. DHW
m0846
4a Spores and elaters violet; carpocephala hemispheric with pseudoperianths directed downwards; scale appendages not prominent at apical notch of thallus.
Asterella lindenbergiana
Asterella saccata - IDAHO. J.B. Leiberg (specimen in UC).
4b Spores and elaters brown; carpocephala conical with pseudoperianths directed outwards; scale appendages forming a prominent white tuft at apical notch of thallus.
Asterella saccata