• Genus Cistella on dicots: Habitat, macro, hairs, and spores.
• Possibly C. rubrotincta (from Zotto's folders): Spore size, long and tapering hairs.

Habitat: On dead, hollow, standing stems of herbaceous plant, 2-3 cm wide, lower part of stem but not base, damp when found, not seen on several other stems nearby, in a clearing, no bodies of water in the immediate vicinity, mixed deciduous woodland, mostly Betula pendula and Quercus robur, Low Weald, England (south), mid-April, after rain.

Associates: Lots of small brownish conidiophores, and a few larger black apothecia – possibly Pyrenopeziza (seems to be a common associate).

Apothecia: 20+ on the stem, in a loose group, generally scattered but occasionally 2-caespitose, 0.2-0.3 (0.5) mm diameter without hairs (< 0.6 mm with hairs), < 0.1 mm high (1.5 mm with hairs), pale yellowish with a hint of pink (apricot), shallow cupulate to discoid, translucent, gelatinous appearance and texture; margin distinct, more in-rolled until maturity, like receptacle; hairs whitish, more abundant and longer at the margin, when immature thick and white, when mature appearing conglutinated in regular groups, and pointing outwards; disk more translucent, greyish due to dark substrate, gelatinous appearance, eventually convex.

Storage and method: A short piece of stem stored overnight in a damp box, sections taken from a single large mature-looking apothecium, mounted in tap water (unfortunately median section was a little thick and turned hymenium down), a little pressure applied to separate cells of the hymenium, IKI added to water mount, KOH + CR added after IKI.

IKI: Apical rings weakly bb, some dextrinoid ascoplasm, hairs with yellow contents.
KOH + CR: Hairs strongly red, gel at apices dissolving, ornamentation remaining; exudate more greenish.

Asci: Cylindrical to mildly clavate, apex conical, IKI bb, croziers, 1-2-seriate, many discharging in water mount,.
• Living mature: ~ 33-45 x 4.5-5 (5.7) um, pars sporifera ~30-40%, apex more rounded-conical, spores diagonally oriented, one spore at apex, sometimes with hyaline to greenish VBs above base of ascus.
• Dead mature: ~30-38 x 3.5-4.5 um, pars sporifera ~60-90%, apex more acute-conical, small apical thickening ~1 um, spores more vertically oriented
• Discharged: Small poricidal opening, cylindrical, apex acute, usually with some amyloid material remaining at the extreme apex but once without, still relatively turgid, many small LBs.

Spores: Narrow-ellipsoid to fusiform, poles rounded to acute, usually heteropolar with the base more attenuated and acute (apex more rounded-obtuse), a few tiny shadowy LBs around the poles, OCI 1.
Vital spores measured in water mount: (6.9) 7.1-8.0 (8.7) × 1.7-2.1 µm, Q = (3.5) 3.6 - 4.2, n = 11, mean = 7.5 × 1.9 µm, Q mean = 3.9.

Paraphyses: Gradually lanceolate to filiform, 2.5-3 um wide, apex rounded-acute, ~3 septa, exceeding immature asci, very faint yellowish VBs (very lowly refractive and more noticeable at lower magnification), several shadowy LBs more noticeable in KOH + CR.

Marginal hairs: ~40-60 x 5-6 um, apices ~2.5-3 um wide, abundant at margin, some at flank, broad-cylindrical, tapering, sinuous, apex rounded, protruding part observed with 3-4 septa, 1-2 apical cells with very light ornamentation of tiny warts, ornamentation remaining in KOH, longer hairs with tangled apices, apparently conglutinated, bases apparently with VBs like paraphyses; some shorter hairs, 30-40 um long, clavate apical cell, apparently unornamented.

Exudate: Yellow-brown, thick, globular, gelatinous, on surface of ectal excipulum and short hairs around base.

Ectal ex: Very light yellowish at low magnification, hyaline at high magnification, surface with textura prismatica, internally possibly textura globosa.