A traveler (Robyn) saw a 20+ year old plant in a German B&B with long "hairy spider legs" growing from the pot and seeds on leaf undersides. The owner gave her leaves with seeds, but they were lost. She wanted to find and buy the plant.
The "seeds" are spores—typical of ferns. The description matches two rabbit's foot ferns:
The furry legs are rhizomes that crawl, spread, and attach in nature.

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