nicolasvv's Identifications

Black cup fungi was growing on the ground under oak, maple... Apothecium cupulate, 2.5cm in diameter, sessile.
Asci operculate, 8-spored, uniseriate with croziers, J+.
Ascospores are ellipsoid, biguttulate, hyaline, reticulate, measured from asci
12.1 - 12.9 (13.4) × (7.8) 8.1 - 8.8 (9.1) µm
Q = 1.4 - 1.6 (1.7) ; N = 8
Me = 12.5 × 8.5 µm ; Qe = 1.5
Paraphyses filiform, septate with VBs.

Directly on a boardwalk.
Asci 8-spored, H+.
Ascospores fusiform, multiguttulate, with small isolated warts visible under oil objective.
Paraphyses cylindrical, straight, not enlarge at the apex, with low refracting guttules, septate.
Marginal hairs brown, length 300-500um.

On a bare ground next and right on the hiking path in a mixed forest.
Asci 8-spored, H+.
Ascospores ellipsoid, verrucose, biguttulate, measured
*(13.6) 14.6 - 16 (16.3) × (7.7) 8.4 - 9.1 (9.2) µm
Q = 1.7 - 1.8 (1.9) ; N = 18
Me = 15.4 × 8.7 µm ; Qe = 1.8
Paraphyses cylindrical, septate.

A single cup was found on the ground in a mixed forest, next to a hiking path.
Apothecia sessile, yellow-green, about 5mm in diameter.
Asci 8-spored.
Ascospores fusiform with ridges, purple at maturity.

Reoccuring species on the same spot. About a dozen of fruiting bodies.
Apothecia stipitate, 5-6mm in diameter.
Asci 8-spored, operculate, H+.
Ascospores ellipsoid, mostly uniguttulate when matured, reticulate.
Paraphyses cylindrical, bright orange.
Margin with hyaline hairs. Some hairs thick-walled.

On decaying Betula papyrifera. Similar looking fruits were widespread in the forest on other hardwoods. Violet tones noticable when pseudostem was broken.
Heavily sporulating days after collected.
Ascospores elliptical, with distinctly round warts prevalent. Spores often with rounded apiculi at the ends.
(17.7) 18.6 - 20.1 (20.6) × (8.2) 8.4 - 9.3 (9.6) µm
Q = (1.9) 2 - 2.28 (2.3) ; N = 33
Me = 19.4 × 8.9 µm ; Qe = 2.2

Asci
(242.3) 246 - 268.3 (281.2) × (12.1) 12.2 - 14.4 (17.6) µm
Q = (14.6) 17.3 - 22 (22.4) ; N = 17
Me = 259.9 × 13.6 µm ; Qe = 19.4

Paraphyses simple, with rounded ends which are sometimes subclavate.
3-5um wide, up to 5.4um wide at apex. -- n=10,

Medium and large size cup fungi were growing on the ground in a mixed forest (burr oak, basswood, ash, sugar maple, prunus, betula, white pine, cedar…) the largest apothecium was 14cm in diameter, many were around 10cm.
Asci operculate, 8-spored, H+, uniseriate, IKI+.
Ascospores fusiform, verrucose, multiguttulate, hyaline, measured
*(16.4) 17.6 - 18.4 × (7.5) 7.6 - 8.49 (8.5) µm
Q = (2.1) 2.14 - 2.36 (2.4) ; N = 12
Me = 17.9 × 8 µm ; Qe = 2.2
Paraphyses cylindrical, mostly straight, septate, width 4.5-5.5um.
Medullary excipulum with 3 layers.