Lambertella corni-maris

When found on apples or grown on rotting fruit in the lab, L. corni-maris forms apothecia. The apothecia are positively phototropic, though light does not affect growth. They vary in shape and color depending on maturity. They begin crateriform, then saucer-shaped, then flatten as they mature. They range from pale pink to dark brown, varied by location and age. Apothecia found on apples ranges from 1 to 5 mm, while those found on pears ranged from 1.5 to 7.5 mm. Asci are shortly stalked, clavate, and inoperculate. The average size of asci is 100 x 7.5 μm. Asci contain eight ovoid spores, which begin colorless, and turn dark brown as they mature. Spores are unicellular and contain two vacuoles. Paraphyses are colorless, aseptate and unbranched, and numerous, either equal to or exceeding the number of asci. Lambertella corni-maris has several unique features noted when grown on agar. Its most favorable medium contains glucose and peptone as sources of carbon and nitrogen. Optimum pH for growth is 4.4, though growth occurs from pH 1.6-8.3. The species tends to grow towards areas higher in acidity. It can grow in temperatures ranging from 5° to 30° C, and the optimum temperature is 20° C. No growth occurs at 30° C or above. …

Lambertella corni-maris was first discovered in Austria on cherry fruits. It is distributed throughout western Europe, and has also been noted in Japan, and the Pacific northwest United States.