Type: Radicicolous Fungi; Description: Colonies on corn meal agar forming a moderate amount of aerial mycelium, main hyphae up to 6μm wide, hyphal swellings globose, obovate or irregular in shape, terminal and intercalary. Sporangia terminal or intercalary, globose, 11–27 μm in diameter or ellipsoidal to limoniform, 10–40 × 5–25 μm. Oogonia mostly intercalary, often in chains, globose to ellipsoidal, 11–30 × 10–22 μm, wall smooth with 0–5 spines of irregular shape. Antheridia 1–3 per oogonium, mostly mono-clinous, often with long stalks. Oospores aplerotic, 10–20 μm in diameter.

Distribution: Northland, Auckland, Waikato, Bay of Plenty, Taranaki, Rangitikei, Wanganui, Wellington, Hawkes Bay, Wairarapa, Mid Canterbury, South Canterbury.; 1st Record: Robertson (1973a).

Significance: A very common soil- and plant-inhabiting species with a very wide host range. Frequently isolated from diseased roots and damped-off seedlings (Robertson 1973a). Reported to be highly pathogenic to roots of vegetable seedlings (Robertson 1976).; Host(s): Acacia sp., Acmena smithii, Agathis australis, Agonis sp., Aphelandra squarrosa, Aralia sp., Araucaria heterophylla, Boronia megastigma, Calluna vulgaris, Casuarina cunninghamiana, Chamaecyparis lawsoniana, C. obtusa, Coprosma sp., Correa ×harrisii, Cupressus cashmeriana, Cytisus scoparius, Dodonaea viscosa, Erica sp., Eucalyptus cinerea, Euphorbia pulcherrima, Fatsia japonica, Goodia lotifolia, Hebe ×andersonii, H. hectorii subsp. demissa, H. odora, Hydrangea macrophylla, Juniperus communis, J. recurva var. coxii, Lophomyrtus sp., Luculia gratissima, Lupinus albus, Malus ×domestica, Mespilus germanica, Mimosa sp., Muntingia calabura, Nerium oleander, Parahebe sp., Persea americana, Pinus taeda, Pittosporum tenuifolium, Podocarpus alpinus, Pseudopanax sp., Rhododendron indicum, Salix alba var. vitellina, S. matsudana, Schinus molle, Taxus baccata, Vaccinium corymbosum, Viburnum ×burkwoodii.