If I'm not mistaken, this species has not previously been find in Europe.
Therefore, I send you more in detail information about it from the literature and ask you, if possible, try to find this on overwintered stems of Chelidonium majus during your fees.

Alex

Streptotinia cf. caulophylli M.E. Elliott in anamorph state Streptobotrys cf. caulophylli Hennebert

Sclerotia are black, characteristically flattened, loaf shaped or hemisphaerical, sometimes oblong, 500-1000 × 400-700 ?m, firmly attached to the substrate, with gelatinous matrix. Conidiophores erect, single or in dense groups, up to 700 ?m tall, with large loose conidial heads. Stipes brown, straight, cylindrical, septate, with a slightly swollen basal cell, 13-15 ?m in width near the base. At about half height stipe alternately branched. Side branches and branchlets are streptoform (i.e. twisted tightly), brown, 6.9-7.9 (-11.2) ?m in width. Terminal conidiogenous cells are lighter and densely branched, producing 2 to 6 simultaneous conidial buds on short pedicels, collapsing at maturity, leaving the branchlets with terminal perpendicular stumps which do not proliferate. Conidia holoblastic, regularly globose, subhyaline to brown, minutely echinulate, (7.1-) 7.4-8.8 (-10) -15 ?m in diameter, bearing an inconspicuous frill at the basal septum.

Streptobotrys caulophylli was described from Berberidaceae representative Caulophyllum thalictroides (L.) Michx. (Elliott, 1962). Also it is known from Ranunculaceae representatives: Thalictrum polygamum Muhl. (Elliott, 1969), Lamptocapnos spectabilis (L.) Fukuhara and Aquilegia vulgaris L. (Hong et al., 2004).

One of the principal characteristics of Streptotinia is the Botrytis-like conidial state – Streptobotrys in which the conidiophores are streptoform. Whetzel (1945) collected Botrytis conidiophores with streptoform braches from numerous hosts, including Papaveraceae representatives Glaucum flavum Crantz and Dicranostigma franchettianum Fedde. Whetzel believed that his material included several undescribed species, and he even placed tentative specific names on some of the specimens. However, this work was not completed.

Elliott (1969) found morphologically indistinguishable from Streptobotrys caulophylli species on Sanguinaria canadensis L. (Papaveraceae). She carried out series of experiments with cultures of Streptobotrys isolated from Caulophyllum, Thalictrum and Sanguinaria. Apothecia were regularly produced in culture after mating isolates from both Caulophyllum and Thalictrum, but never were produced for isolates from Sanguinaria. As a result, she could not get a definite answer whether the samples from Sanguinaria really are Streptobotrys caulophylli or it is the undescribed double-species. In this regard, our finding from Chelidonium majus L. (Papaveraceae) is of particular interest.