Nectria australiensis Seifert, Stud. Mycol. 27: 109. 1985. Figs 18, 19.

Anamorph: Tubercularia australiensis Seifert, Stud. Mycol. 27: 109. 1985.

Teleomorph on natural substrata: Mycelium not visible around ascomata or on host. Stromata erumpent through epidermis, up to 1.0 mm high and 1.5 mm diam, red to umber, KOH+ dark purple, LA+ yellow, pseudoparenchymatous, cells forming textura angularis, intergrading with ascomatal wall. Ascomata superficial on welldeveloped stromata, scattered to aggregated in groups of 5-35, subglobose to globose, 200-330 [micro]m high x 200-325 [micro]m diam, slightly cupulate upon drying, sometimes with only a depressed apical region, red to umber, apical region slightly darker, KOH+ dark purple, LA+ yellow, smooth to roughened. Ascomatal surface cells forming textura globulosa or t. angularis, 4-16 [micro]m diam, with pigmented, uniformly ca. 1.5 [micro]m thickened walls. Ascomatal wall 43-63 [micro]m thick, of two regions: outer region 28-49 [micro]m thick, intergrading with stroma, cells forming textura globulosa or t. angularis, walls pigmented, about 1.5 [micro]m thick; inner region 8-16 [micro]m thick, of elongate, thin-walled, hyaline cells, forming textura prismatica. Asci narrowly clavate, 92-140 x 7-14 [micro]m, with inconspicuous ring at apex, 8-spored, usually uniseriate, rarely biseriate above, uniseriate below. Ascospores ellipsoidal to rarely fusiform, straight, (10.9-)12.0-14.4(-16.4) x (4.6-)5.2-6.6(-8.0) [micro]m (n = 90), 1-septate, hyaline to yellowishbrown, weakly spinulose.

Anamorph on natural substrata: Synnemata usually erumpent through epidermis, solitary, rarely gregarious, emerging from ascomatal cluster or independently, caespitose, cylindrical-capitate, subulate-capitate, or claviform, erect or nodding, unbranched, slender to medium stature, distinctly hispid at base to mid-level of stalk, some young synnemata smooth to granular, fleshy gelatinous when fresh, red-brown at base, turning blood-red in KOH, almost black in age, 800-1000 [micro]m high including stipe, 250-350 [micro]m wide at base. Hyphae on stipe pigmented golden brown at base, becoming less pigmented towards apex, KOH+, 6-10 [micro]m wide; internal hyphae hyaline, KOH-, 4-7 [micro]m wide. Ornamental hyphae on stipe cylindrical, straight or curved, rarely sinuous or twisted, arising laterally at more or less right angles, distributed evenly over surface of synnemata or concentrated near base in some collections, or near apex in others, 6-13 [micro]m long, 1.4-2.5 [micro]m wide, usually unbranched but occasionally dichotomously branched, aseptate or with up to 2-septae, septa thin or up to 1 [micro]m thick, terminal hyphae clavate to subglobose, 6-13 [micro]m wide, cell walls 1.5-2 [micro]m thick. Conidiophores with long sterile hyphae, branching monoverticillate or biverticillate, whorls compact or diffuse, metulae, if present, 36-65 x 2.0-3.5 [micro]m. Conidiogenous cells enteroblastic, monophialidic, cylindrical to subulate, straight or curved, 15-32 x 1.6-3.1 [micro]m, collarette not conspicuous. Sterile hyphae mixed with phialides, acicular, curved, rarely straight, unbranched or dichotomously branched, septate, 84-145 x 1.6 -3.7 [micro]m, arising from hyphae in whorls, or more often in groups of conidiophores together with phialides. Conidial masses globose, hemisphaerical or more or less discoid, white to saffron when fresh, drying reddish black, 300-500 [micro]m diam. Conidia hyaline, ellipsoidal to fusiform, rarely obovate, straight, non-septate, (5.8-)6.7-8.1(-9.6) x (3.3-) 3.7-4.5(-5.1) [micro]m, (n = 60), smooth-walled.

Habitat: On bark of Hoheria populnea (Malvaceae).

Distribution: Oceania...