Many shapes and sizes for the rhizomes. Long and skinny, short and fat. But all crumble if not handled carefully. Mine have been left to multiply for years. I think they probably are cannibals now. More rhizomes than soil
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Will Eucodonias also work with a leaf cutting? I know they do with a stem cutting. The hybrids among this group (Achimenes, Eucodonia, Smithiantha) have been harder, but with patience they have worked with stem cuttings also.