Stigmaria
Fossil
About it
Root-like underground branches of giant clubmoss trees, dotted with small round scars where rootlets grew. Very common in the clay beds just under coal seams.
- Type
- Fossil (plant)
- Group
- Lycopsid, giant clubmoss (plant)
- Colours
- grey, black, brown
- Transparency
- opaque
- Periods
- Carboniferous
Typical values: real specimens vary. For more, see mindat.org.