Hymenoscyphus scutula W. Phillips
no common name
Helotiaceae
Species account author: Ian Gibson.
Extracted from Matchmaker: Mushrooms of the Pacific Northwest.
Introduction to the Macrofungi
no common name
Helotiaceae
Species account author: Ian Gibson.
Extracted from Matchmaker: Mushrooms of the Pacific Northwest.
Introduction to the Macrofungi
Species Information
Summary:
Features include a minute, pale yellow to white, smooth cup, a slender stem, growth on herbaceous stems, and microscopic characters that may include a bristle on each end of the spore.
Microscopic:
spores 20-28 x 3-4 microns, "fusoid, or clavate, slightly curved, often spuriously 1-3-septate", irregularly biseriate, occasionally with a cilium at one or both ends; asci 8-spored, reaching a length of 90-100 microns and a width of 8-10 microns, clavate; paraphyses filiform, reaching a diameter of 7 microns, (Seaver), 19-20 x 3.2-4 microns, fusiform, smooth, colorless, with 2 or several droplets, normally with colorless bristle on each end, sometimes one-septate, spores biseriate in asci; asci 8-spored, 90-95 x 8 microns, amyloid; paraphyses "slender, gradually thickened slightly toward the tips to 3 microns wide, septate", (Breitenbach), spores 18-27 x 3.5-5 microns, somewhat cylindric, pointed in lower part and asymmetrically rounded or slightly beaked in upper part, with a fine colorless bristle at lower end and usually a shorter one at upper end, containing 2 oil droplets, biseriate, sometimes becoming septate; asci 8-spored, 110 x 11 microns, cylindric-clavate, somewhat conic at tip with pore made blue by iodine; paraphyses slender, widened upwards to about 3 microns, (Dennis), spores 18-20 x 4-6 microns, one-celled in contrast to type variety which is two-celled, ascus turns weakly blue in iodine, (Kanouse for var. caudatum), spores 14-18 x 3.5-4 microns, smaller than in typical material, (Kanouse for var. grossulariae), spores (12)14-18 x 3-4 microns, slightly curved and almost pointed at one end, one-celled, (Kanouse for forma rubi)
Notes:
Hymenoscyphus scutula is found from NY to OR, and MO, and probably throughout North America (as well as in Europe), (Seaver). It has also been found in WA (Kanouse, var. grossulariae, forma rubi, and var. caudatum which may correspond to a similar species Hymenoscyphus caudatum). There is a collection from BC determined by R. Bandoni at the University of British Columbia (as Helotium), and 2 other collections from BC at the Pacific Forestry Centre.
Habitat and Range
Habitat
thickly gregarious, on herbaceous stems of various kinds, (Seaver), occasionally single but usually gregarious and covering entire stems; on rotting stems of various herbs, especially Compositae, in damp places under the plants, (Breitenbach), scattered on dead herbaceous stems, (Dennis), on leaves of Salix (willow), (Kanouse for var. caudatum), on herbaceous stems (Kanouse for var. grossulariae), on Rubus stems (Kanouse for forma rubi)
Status Information
Synonyms
Synonyms and Alternate Names:
Calycella scutula Quel.
Ciboria ciliatospora Fuckel
Coryne sarcoides (Jacq.) Tul. & C. Tul.
Helotium ciliatosporum Boud.
Helotium scutula (Pers.) P. Karst.
Peziza scutula Pers.