Ascocarps intraepidermal to subepidermal. In vertical section upper wall up to 50 µm wide, comprising a 20-30 µm wide layer of dark brown, thick walled, hyphal cells, 5-12 µm diam. Inner layer of wall lined by a 10-20 µm wide layer of crystals. A layer of periphyses, 10-15 x 2-3 µm, forms on the inside of the lower part of the wall. Lower wall 15-30 µm wide, similar in structure to the upper wall, with some hyphae extending below the wall layer amongst the host hypodermal cells. Subhymenium 5-8 µm wide, of hyaline, thin walled, more or less globose cells.

Paraphyses 1-2 µm diam., irregularly swollen and branching near the apices, capped by scattered clumps or crystals, not extending beyond asci. Asci cylindric or wider toward the base, narrowing abruptly to a short, basal foot, tapering gradually to the rounded apex, 71-76 X 5.5-6.5 pm (up to 8- 1 0 pm wide near the base), uniformly thin walled, non-amyloid, 8-spored. Ascospores filiform, 51-67 x 1-1.5 µm, 1-septate, with a small swelling (up to 2 µm diam.) above the septum, gelatinous cap at both ends.

ETYMOLOGY: dendrobii; refers to host plant.

NOTES: Distinguished from P. emarginata, the other dark walled Propolis species found in New Zealand, by ascospore shape.