Dioscorides' Plants, Then and Now
ὑπερικόν

St John's wort

Hypericum perforatum L. · Hypericaceae
Identification: DisputedNot endemic to GreeceConservation status not assessed
Risk rank
10 of 32 (5–11)
Risk score
0.34(0.32–0.34)2 · Moderate
Identification disputed. Scholars propose more than one modern species. We model the most cited candidate and show the alternative for comparison. Rankings are also reported without disputed plants on the Methods page. See how its rank changes under each alternative identification.
Modelled
Hypericum perforatum
Sprengel, K. 1830. Pedanii Dioscoridis Anazarbei De materia medica libri quinque, tomus secundus (Commentarius in Dioscoridem), Medicorum Graecorum Opera vol. 26, Leipzig, Comm. lib. III cap. CLXI, pp. 566-567 (finds no Hypericum matching ὑπερικόν exactly except H. barbatum Jacq.; Sibthorp's H. crispum 'less pertinent'; assigns H. perforatum to ἄσκυρον, cap. CLXII)
Alternative
Hypericum barbatum Jacq.
Sprengel, K. 1830. Pedanii Dioscoridis Anazarbei De materia medica libri quinque, tomus secundus (Commentarius in Dioscoridem), Medicorum Graecorum Opera vol. 26, Leipzig, p. 567
Alternative
Hypericum crispum L. (= H. triquetrifolium Turra) (Sibthorp, as reported by Sprengel)
Sprengel, K. 1830. Pedanii Dioscoridis Anazarbei De materia medica libri quinque, tomus secundus (Commentarius in Dioscoridem), Medicorum Graecorum Opera vol. 26, Leipzig, p. 567

Then and now

2050 · moderate emissions. SSP2-4.5, 2041-2060, 3 climate models; ranges show the spread.

The plant
ὑπερικόν
Photograph of Hypericum perforatum
Photo: Didier Descouens · CC BY-SA 4.0 · Wikimedia Commons (photo of St John's wort)
2050 · moderate emissions
Natural Earth (PD) · model output · ~10 km cells
Loading map layers (0 of 1)
Layers
Range keptLost by 2050Gained by 2050Cultivation zoneNatura 2000Occurrence cellCells ≈ 10 × 10 km

Occurrences are aggregated to ~10 km cells; exact points are never published. View range data as a table

De Materia Medica · Book III · ch. 154c. 50–70 CE
ὑπερικόν
hyperikon
ὑπερικόν· οἱ δὲ ἀνδρόσαιμον, οἱ δὲ κόριον, οἱ δὲ χαμαίπιτυν διὰ τὸ τὴν περὶ τὸ σπέρμα ὀσμὴν ἐοικέναι ῥητίνῃ πιτυΐνῃ. …
Modern identification
Hypericum perforatumL. · HypericaceaeDisputed

Source: Sprengel, K. 1830. Pedanii Dioscoridis Anazarbei De materia medica libri quinque, tomus secundus (Commentarius in Dioscoridem), Medicorum Graecorum Opera vol….

Full citation and quoted evidence

Sprengel, K. 1830. Pedanii Dioscoridis Anazarbei De materia medica libri quinque, tomus secundus (Commentarius in Dioscoridem), Medicorum Graecorum Opera vol. 26, Leipzig, Comm. lib. III cap. CLXI, pp. 566-567 (finds no Hypericum matching ὑπερικόν exactly except H. barbatum Jacq.; Sibthorp's H. crispum 'less pertinent'; assigns H. perforatum to ἄσκυρον, cap. CLXII)

Opening words of the chapter (Wellmann numbering). Edition: Wellmann 1906-1914 (vol. I 1907, vol. II 1906), Berlin: Weidmann; transcribed by eye from the archive.org page scan (Wellmann's ϑ glyph rendered as θ; no emendation). See the page scan.

Modern official status

European Medicines Agency herbal monograph

Hyperici herba · category: well-established; traditional

We report regulatory status only and make no claim about effects. Read the monograph for its exact wording.

Open the monograph on ema.europa.eu

Projected range change by 2050

2050 · moderate (SSP2-4.5)−9% (−5 to −10%)
2050 · high (SSP5-8.5)−13% (−10 to −14%)

Median and spread across 3 climate models. Whisker axis −80% to +20%, dashed tick at 0; a chevron means the value runs beyond the axis.

Suitable cultivation area, 2050 moderate0 km² (0–0 km²)

Risk score breakdown

0.34 (0.32–0.34)Moderate risk class 2
00.51.0
  • Range loss 0.04 of max 0.40 · (0.02–0.04)
  • Endemism 0.00 of max 0.20 · not endemic
  • Conservation status 0.10 of max 0.20 · not assessed
  • Harvest pressure 0.20 of max 0.20

Stays in the top 10 in 77% of 1,000 random weightings.

How the score is built, and how sensitive it is to weights

Model quality

Standard grade
AUC (spatial block CV)
0.77 ± 0.03
Distance-only baseline AUC
0.71 ours is higher
Boyce index
0.90 ± 0.11
TSS
0.45 ± 0.06
Occurrence records
765 after cleaning (of 1,019)

5-fold spatial block cross-validation (~25 km blocks); ± is one standard deviation across folds. Null model AUC 0.49. The baseline scores each held-out point by its distance to the nearest training record, on the same folds. "Standard" grade means ≥ 30 records, AUC ≥ 0.75 and above the baseline; fewer than 10 records is a data gap; anything else is low grade.

Suggested action

Protect: no cultivation fallback

Prioritise in-situ protection and seed banking; no suitable farmland found. Resolve the identification first.

Rule: Loses habitat in all 3 climate models · no 2050 cultivation zone.

See the action plan

Identification through time

Who has matched ὑπερικόν to which modern plant, from the Renaissance to today.

All names through time
Cited for the identification we modelProposed an alternativeAlternative preferred by our sourceAlternative rejected by our sourceCommonly proposed, not verified by us
Renaissance commentators
Linnaean botany & Flora Graeca
Edition
Modern
150016001700180019002000
  • ὑπερικόνDMM 3.154 · St John's wortHypericum perforatumDisputed

Select a mark to read who proposed which plant, and the source we read it in.

Dates are each authority's main herbal or commentary (approximate, "c."), used to order the timeline. Claims are parsed from our curated identification table; every quote links back to a page scan or edition on the plant page.

Caveats

  • Identification is disputed; results describe Hypericum perforatum L., which may not be the plant Dioscorides meant.

Range data (map alternative)

ScenarioSuitable ~10 km cellsChangeShare in Natura 2000
Now964—26.6%
2050 moderate914 (912–929)−9% (−5 to −10%)28% (28–28%)
2050 high881 (876–901)−13% (−10 to −14%)28% (28–29%)