Subiculum persistent, woolly to felty appressed, with synnemata. Stromata (1500)1785 ± 185(2000) µm high, (2050)2180 ± 124(2375) µm wide (n = 5), globose to subglobose with flattened top, copper brown, dark brown, black around the ostioles, solitary, crowded. Ostioles finely papillate, poorly differentiated. Ectostroma up to 150 µm thick, black. Entostroma cream, confined to sides and base, gradually reduced and absent in older material. Perithecia detached and collapsed in mature material. Ascus apical rings 7.6-8.6 µm long, upper width 6.5-7 µm, lower width 4.8-5.7 µm (n = 3), J+, dark blue. Ascospores (52.8)61.7 ± 4.3(70) µm long, (6.7)8 ± 0.5(8.6) µm wide (n = 30), inequilateral, narrowly ellipsoidal to needle shaped, with narrowly rounded ends, brown, with straight, 9-12 µm long germ slit centred on the flat side, both extremities and flat side surrounded by a slimy sheath, 2-3 µm thick at ends, 1 µm thick at side. Synnemata 500- 1000 µm high, conidia 4-5.5 x 2.5-3 µm.
ANAMORPH: Dematophora.

HOST: Freycinetia baueriana subsp. banksii.
MATRIX: Decorticated, heavily decomposed wood.

Subiculum perdurans, lanosum ad appressum,b synnemata ferens. Stromata (1500)1785 ± 185(2000) µm alta, (2050)2180 ± 124(2375) µm lata, globosa vel subglobosa apice applanato, cupreobrunnea ad atrobrunnea, nigra ostiola circa, singularia, conferta. ostiola laeviter papillata, indistincta. Annulus apicalis asci 7.6-8.6 µm altus, parte superiore 6.5- 7 µm et inferiore 4.8-5.7 µm latus, iodo valde coerulescenti. Ascosporae (52.8)61.7 ± 4.3(70) µm longae, (6.7)8 ± 0.5(8.6) µm latae, asymmetricae, anguste ellipticae ad aciculares, apicibus anguste rotundatis, brunneae, fissura germinativa recta 9- 12 µm longa, in parte plana insita praeditae, utrisque apicibus et parte plana vagina mucosa 2-3 µm in apicibus et 1 µm in latere crassa circumdatae. Status anamorphosis Dematophora.

ETYMOLOGY: Referring to the host plant.
NOTES: Rosellinia freycinetiae exhibits the typical character combination of Rosellinia spp. with a Dematophora anamorph: large, coarse stromata and arge, slender ascospores with a short germ slit and both extremities and flattened side surrounded by a slimy sheath. It can be distinguished from R. arcuata and R. necatrix by its larger ascospores and from R. gigantea and R. pepo by its smaller stromata, being about half the size of the stromata of the two latter species. For a discussion on the differences from other related species, see R. arcuata.

HOLOTYPUS (hic designatus): New Zealand, North Island, Auckland: Walkers Bush, Henderson, on Freycinetia banksii, 30 Jan 1963, F. J. Morton, PDD 20580.