Paecilomyces fulvus Stolk & E. S. Salmon 1971

British Isles; Egypt; UK.

Colonies. On CYA and MEA at least 60 mm diam., often covering the whole Petri dish, rather sparse, low or somewhat floccose; conidial production heavy, uniformly coloured olive brown or paler; reverse in similar colours or pale. On G25N 5-10 mm diam., texture variable, low and sparse to deep and floccose, coloured white or as on CYA. No growth at 58°C. At 30 and 37°C, usually covering the whole Petri dish, low and sparse, coloured as on CYA or brighter; reverse in similar colours. Conidiophores. Penicilli, best observed at 25°C, borne from surface hyphae or long, trailing, aerial hyphae; stipes 10-30 μm long. Conidiogenous cells. Not uniform in appearance, flask shaped or narrowing gradually to the apices, 12-20 μm long. Conidia. Mostly cylindroid or doliiform (barrel shaped), usually narrow and 7-10 μm long, but sometimes longer, wider or ellipsoidal from some conidiogenous cells, smooth walled. Ascomata. Comprising single asci borne from, but not enveloped by, wefts of contorted white hyphae, best developed at 30°C on MEA, maturing in 7-12 days, occasionally formed at 25°C in fresh isolates but maturing slowly if at all. Asci. Spherical to sub-spherical, 9-12 μm diam. Ascospores. Ellipsoidal, 5-7 μm long, smooth walled.

Paecilomyces fulva is a plant pathogen that causes Byssochlamys rot on strawberries.