Asplenium adulteriniforme

A rare natural hybrid spleenwort involving Asplenium adulterinum, described by Lovis, Melzer and Reichstein in 1965 and known from serpentine rock in Austria (Styria) and Italy. Like its parent it is a small tufted rock fern of ultramafic outcrops with cold winters; as a sterile hybrid it can only be grown from divisions, not spores.

At home, aim for

Day Cool-growingTargets in Plantistry

Night Close to the dayTargets in Plantistry

Humidity Ordinary room humidityBand in Plantistry

Light Bright, filtered lightDLI and PPFD in Plantistry

Expects a seasonal restGrows on rock (lithophyte)

Where it grows wild

Crevices of serpentine (ultramafic) rock alongside its parents. A. adulterinum grows in half-shade on moderately moist, nutrient-poor serpentine cliffs and boulders.

The Austrian records carry no elevation; the Styrian serpentine sites lie roughly in the 500–1000 m band.

AustriaItaly

🔒 Growing it like that

The wild conditions above, turned into targets for a shelf, a tent or a greenhouse. The full profile has:

✓ Day and night temperature targets, and the limits it tolerates

✓ Humidity band, and how to hold it

✓ Light as DLI and PPFD for a grow light

✓ Wet and dry seasons, and whether to rest it

✓ Substrate and airflow

✓ A step-by-step setup to grow it like the wild

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Profiles are drafts built from measured range and climate and from published sources; each section carries its own confidence in the app.