Specimen numbers and preparation types in Museum's fern collections:
| | Specimens | Type specimens |
| All extant ferns | 255,000 | 6,600 |
| Lycophytes | 25,000 | 400 |
| Spirit collection | 1,000 | not estimated |
| Microscopic preparations | 400 | not estimated |
| Unmounted (backlogs) | 60,000 | not estimated |
