Ascocarps initially subcuticular, with some epidermal cells becoming filled with fungal tissue as the ascocarp ages. In vertical section upper stromatal layer 15-20 µm wide, comprising brown to pale brown, thin walled, rounded cells, 4-6 µm diam. This layer does not extend as far as the outer edge of the ascocarp. The area between the upper and lower stromatal layers is filled with hyaline, gelatinous tissue. Cylindric, vertically orientated, hyaline, gelatinous-walled cells develop between the upper stromatal layer and the covering host tissue. These cells form a well-developed layer in immature ascocarps, but are often difficult to distinguish after the ascocarp has opened. A few periphyses, 12-17 x 2-3 µm, line the inside of the upper wall. The lower stromatal layer is 60-70 µm wide; the outer 30-40 µm is composed of dark brown, thick walled, globose cells, 5-8 µm diam., the inner part composed of hyaline, globose cells, 6-10 µm diam. Subhymenium 10- 15 µm wide, of hyaline, gelatinous-walled cells.

Paraphyses 2-2.5 µm diam., gradually increasing in width to 3-4 µm diam. at the apex, not branching, not gelled together, extending 20-30 µm beyond the asci. Asci 137-155 x 8.5-10 µm, subclavate, tapering in slightly to the broadly truncate to slightly rounded apex, the wall sometimes with a short, broad apical pore, non-amyloid, 8-spored. Ascospores 58-72 x 2.5-3 µm, tapering slightly to basal end with a small swelling at the very base, 0-septate, straight when released, gelatinous cap at both ends.

Pycnidia intraepidermal, flat, lenticular in shape, lower wall of brown, angular cells, upper wall absent. Conidiogenous layer lining the lower wall, comprising a palisade of solitary, cylindric, hyaline, sympodial conidiogenous cells, 8-16 x 2-3 µm. Intermixed amongst the conidiogenous cells, especially near the centre of the pycnidia are filiform, hyaline, sterile elements, 45-60 x 1-2 µm. Conidia, 5-6 x 1-2 µm, short-cylindric, rounded at both ends, hyaline, 0-septate.

ETYMOLOGY: longwoodicus; refers to type locality.

NOTES: The ascocarps of C. longwoodicus are similar in macroscopic appearance to two other species found on southern conifers, C. cupressinum and C. libocedri, with all having a pale, poorly developed upper ascocarp wall. The three species can be distinguished using ascus and ascospore size.