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Dioon
No Dioon record carries a directional primary verdict yet — all 2 await evidence. These counts describe the cited records — 2 records carrying 4 evidence rows from 1 cited source; they do not make one verdict for the genus.
Awaiting evidence
2 species
About Dioon
Corpus context. Dioon is the directory's #423 largest of 550 genus groups: 2 records carrying 4 evidence rows from 1 cited source, recorded as tree . Those are corpus facts, not a whole-genus flammability claim.
More about Dioon: Wikipedia — external references; not evidence sources.