Guide to Liverworts of Oregon: Key to Fossombronia 2
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Fossombronia 1a seta long > Fossombronia 2
Fossombronia sp. Left: Alameda Co., California. DHW s.n 2 June 2004; Right: Hastings Reserve, Monterey County, California. DHW m1219
2a Spores with lamellae close together, sometimes the ridges very short and more like spines; spores 10-12 lamellae wide; not confirmed from Oregon, very common in California.
Fossombronia longiseta
Fossombronia pusilla - Ferris Gulch, Jackson Co., Oregon. DHW
9114a
2b Spores with lamellae at least as far apart as the lamellae are high; spores 7-8 lamellae wide; abundance variable.
(COUPLET 3)