Guide to Liverworts of Oregon: Key to Marchantia 1

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1a plants thallose > 2b chloroplasts numerous > 62b thallus tissue complex > 70b terrestrial > 72b pores differentiated > 73a gemmae present > 74a gemmae cups circular > Marchantia

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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 > 79a pores compound > 80a scale appendages reniform > Marchantia

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Marchantia polymorpha - Jackson County, Oregon. DHW 9957a.

1a Margin of ventral scale appendage entire; upper side with dark central stripe; low to middle elevations.
Marchantia polymorpha

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Left: Marchantia latifolia; Jackson County, Oregon. DHW 9987. Right: Marchantia alpestris; Lane County, Oregon. DHW m0618.

1b Margin of ventral scale appendage moderately to strongly dentate; upper side with discontinuous central stripe or stripe lacking altogether; from low to high elevations.
(COUPLET 2)

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GO BACK ONE STEP (WITH GEMMAE CUPS - Couplet 74)

GO BACK ONE STEP (WITH COMPOUND PORES - Couplet 80)

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