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Avatar for MattH1975
May 12, 2018 5:45 PM CST
Nebraska
Some context:

These are growing in a quart jar terrarium on a spongy mass that appears to have once been wood or bark. I'm uncertain where that material came from but the jar did once host moss taken from a coastal forest in northern CA. I started this particular jar approximately five years ago with substrate taken from a hill and riverbed in southern CA. Following a period of neglect (very little, if any light) I added a small patch of what appears to be a club moss and a leaf (taken from my backyard in southeast NE) and, of course, mail-ordered springtails.

I have additional specimens in a larger jar with a similar history, although in that case they are growing directly on the substrate, which is store-bought soil for acid-loving plants.

The plants appear to be new since the latest additions, but the wood seems rotted enough to have been in the jar since the beginning.

My apologies for the blurry photo. I included it for a better view of the root-like structures, which have a yellow-ish color (something that doesn't come across well in the pictures).

Thank you.
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Avatar for MattH1975
May 12, 2018 6:00 PM CST
Nebraska
I forgot one potentially useful detail: At their largest, these plants are 3/8 inch across.
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May 12, 2018 10:03 PM CST
Name: Daisy I
Reno, Nv (Zone 6b)
Not all who wander are lost
Garden Sages Plant Identifier
I think you are growing a California native called Liverwort.
Life is not a journey to the grave with the intention of arriving safely in a pretty and well preserved body, but rather to skid in broadside, thoroughly used up, totally worn out, and proclaiming...."WOW What a Ride!!" -Mark Frost

President: Orchid Society of Northern Nevada
Webmaster: osnnv.org
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May 12, 2018 10:43 PM CST
Name: Leslieray Hurlburt
Sacramento California (Zone 9b)
The WITWIT Badge Region: California Plant Lover: Loves 'em all! Xeriscape Native Plants and Wildflowers Salvias
Foliage Fan Lover of wildlife (Black bear badge) Birds Bee Lover Hummingbirder Butterflies
This may be it. It's not native to California but it is here.
Hamilton Square Garden, Historic City Cemetery, Sacramento California.
Avatar for MattH1975
May 13, 2018 12:15 PM CST
Nebraska
Thank you both for your input. I've Googled Lunularia cruciata and unfortunately none of the images returned resemble what I have.

I did find an image that looks exactly like what I have on a page concerning Marchantia but it was presented simply as an example of a gametophyte. That same image is also used on Wikipedia's gametophyte entry with the caption: "Close-up of several gametophytes (of unknown species) growing in a terrarium. From soil collected in the US state of Vermont."

Neither my pictures, nor the one on Wikipedia, show anything that *I* can identify as a spore-producing structure but from my searching I've gathered that detail is quite helpful in identifying liverworts.
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May 13, 2018 1:33 PM CST
Name: Leslieray Hurlburt
Sacramento California (Zone 9b)
The WITWIT Badge Region: California Plant Lover: Loves 'em all! Xeriscape Native Plants and Wildflowers Salvias
Foliage Fan Lover of wildlife (Black bear badge) Birds Bee Lover Hummingbirder Butterflies
Cups should eventually develop for asexual reproduction and that will help you determine what you have.
Hamilton Square Garden, Historic City Cemetery, Sacramento California.
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