Monilinia laxa (Ehrenb.) Honey
cup fungi
Sclerotiniaceae
Species account author: Ian Gibson.
Extracted from Matchmaker: Mushrooms of the Pacific Northwest.
Introduction to the Macrofungi
cup fungi
Sclerotiniaceae
Species account author: Ian Gibson.
Extracted from Matchmaker: Mushrooms of the Pacific Northwest.
Introduction to the Macrofungi
Photograph
Species Information
Summary:
Monilinia laxa produces a grayish brown cup or disc with a stem, growing gregariously on mummified plums, but the fruitbody is rare in nature. The conidial stage is more common, forming soft grayish pustules on flowers, branchlets and young plums. The Hansen, L.(1) description is for M. laxa (Aderh. & Ruhl) Honey.
Microscopic:
spores about 12 x 6 microns in diameter, elliptic, uniseriate, or becoming partly biseriate; asci 8-spored, reaching length of about 175-180 microns and a diameter of 8-9 microns, cylindric, narrowed in lower part; conidia 12-23 x 9-15 microns; paraphyses 2-2.5 microns wide, slender, slightly enlarged in upper part, (Seaver), spores 7-19 x 4.5-8.5 microns, elliptic, with rounded ends; asci 120-190 x 7.5-12 microns; conidia 8-23 x 7-16 microns, oval to lemon-shaped, macroconidia "not separated by disjunctors", (Hansen)
Notes:
Monilinia laxa is found in WI and on the Pacific Coast, and is also reported from Europe (including Denmark, Norway, Sweden, Finland), and Japan. There are collections from BC at the Pacific Forestry Centre.
Habitat and Range
Habitat
usually several from the same stroma from mummified plums (Prunus); conidial stage consists of a Monilia of the cinerea type, (Seaver), macroconidial anamorph (Monilia cinerea Bonord.) on flowers and branchlets and later on young fruits in spring and summer; ascus-bearing fruitbodies gregarious on mummified fruits but rare in nature, (Hansen)
Synonyms
Synonyms and Alternate Names:
Junghuhnia luteoalba (Karst.) Ryvarden
Monilia oregonensis Barss & Posey
Physisporus luteoalbus P. Karst.