[5] Samples taken from the location were sent to the geologist Hans Tralau, who carried out palynological research on them, estimating an age of deposition of Late Toarcian-Aalenian(?).

[8] A petrified rhizome was sent to Tralau, who understood the significance of the fossil and intended to publish it formally, but his untimely death in March 1977 made it impossible.

[5] The rhizome, along with the fossil wood, was archived at the Swedish Museum of Natural History, where the geologist Britta Lundblad tried also to publish it formally, what was also impossible due to her retirement in 1986.

[2][3][4][9] The specific epithet pulchella (Latin diminutive of pulchra, 'beautiful', 'fair;) was chosen in reference to the exquisite preservation and aesthetic appeal of the holotype specimen.

[6] It is composed of a small central stem surrounded by a compact mantle of helically arranged petiole bases and interspersed rootlets that extend outwards perpendicular to the axis, indicating a low rhizomatous rather than arborescent growth.

[10] Osmundastrum pulchellum is well known thanks to exceptional preservation of detailed anatomical structures (e.g., pith, stele, petiole base, adventitious roots, and even nuclei).

Exotic roots were recovered on the petiole bases, with a level of preservation that matches that of the whole plant, bearing a similar vasculature as seen in modern lycophytes.

[6] Thread-like structures were found, identified as derived from a pathogenic or saprotrophic fungus invading necrotic tissues of the host plant.

[6] Excavations up to 715 μm in diameter are evident, filled with pellets that resemble the coprolites of oribatid mites, found also in Paleozoic and Mesozoic woods.

[13] Thanks to the data provided by the fossilized wood rings, it was found that the location of Korsaröd hosted a middle-latitude Mediterranean-type biome in the late Early Jurassic, with low rainfall.

[13] Pollen, spores, wood and charcoal locally indicate a complex forest community subject to episodic fires and other forms of disturbance in an active volcanic landscape under a moderately seasonal climate.

[6] Osmundastrum pulchellum was a prominent understorey element in this vegetation and was probably involved in various competitive interactions with neighboring plant species, such as lycophytes, whose roots have been recovered inside the rhizome.

[6] The ferns were part of a fern- and conifer-rich vegetation occupying a topographic depression in the landscape (moist gully) that was engulfed by one or more lahar deposits.