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CCDB → Bryophytes → Orthotrichaceae → Orthotrichum → Orthotrichum roellii Venturi
| Name | Accepted Name | Gametophytic(n) | Sporophytic(2n) | Data Source | reference | ||
| ! | Orthotrichum roellii Venturi | Orthotrichum laevigatum f. macounii (Austin) E. Lawton & Vitt | 6 | Cave1959 | Anderson & Orum 1958 | ||
| ! | Orthotrichum roellii Venturi | Orthotrichum laevigatum f. macounii (Austin) E. Lawton & Vitt | 6, | Fritsch1991 | Fritsch, Reinhard. Index to bryophyte chromosome counts. J. Cramer, 1991. by REINHARD FRITSCH |