By Eagledreamer
United Kingdom 
Can anyone tell me what this is. It looks like a giant Crocosmia corm? It's very fleshy and white inside.
24 May, 2017
Answers
Rex Begonias don't form tubers like that--long, snaky rhizomes instead. It looks like a large cyclamen corm to me.
24 May, 2017
Agree large cyclamen corm.
24 May, 2017
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Could be a large cyclamen hedrafolium or colum tuber. Begonia rex can get that large but would go for one of the former.
24 May, 2017