PILEUS: convex when young, plano-convex at maturity, 3.5-6.5 cm diam., dry, finely felted to subtomentose when young, subglabrous at maturity, dull yellow; cuticle a poorly organised trichodermium when young. Becoming disorganised at maturity and composed of interwoven, thin-walled, smooth or slightly roughened, septate hyphae 3.5-8 µm. diam., terminal cells repent or obliquely ascending, not inflated; margin entire, extending beyond pores, sterile. HYMENOPHORE: tubes to 6 mm long, adnate, yellow to bright golden yellow; pores concolorous with tubes, irregularly angular, 1-1.5 mm diam.; unchanging where damaged. STIPE: 2.5-3.5 cm long, more or less equal, 1.2-1.8 cm diam., solid, dry, subglabrous to finely subvelutinate from a close palisade of caulocystidia, yellow to sordid yellow, annulus absent. SPORES: spore print not obtained; spores melleous, elliptic-subfusiform, 14.2-18.2 X 4.5-5.5 µm, smooth. HYMENIUM: basidia hyaline, clavate, 26-36 X 8.5-10.5 µm, 4-spored; cystidia scattered, hyaline, thin-walled, subcylindrical to cylindrical, 36-55 X 4.5-6.5 µm.. HYMENOPHORAL TRAMA: bilateral of the Boletus subtype; clamp connections absent. CONTEXT OF PILEUS: yellow, unchanging or becoming faintly red on exposure to air. SMELL: not distinctive.

HABITAT: Gregarious under Leptospermum.

Pileus plano-convexus, 3.5-6.5 cm diam., siccus, subtiliter coactus ad subtomentosum ubi juvenilis, subglaber ubi maturus, sordide flavus. Tubi adnati, flavi ad dare aureos; pori concolores, irregulariter angulares, 1-1.5 mm diam. Stipes 2.5-3.5 cm longus, plus minusve aequalis, 1.2-1.8 cm diam., siccus, subglaber ad subtiliter subvelutinum, flavus ad sordide flavum. Sporae elliptico-subfusiformes, 14.2-18.2 X 4.5-5.5 µm, leves. Typus Auckland Province, Kerikeri, Opito Bay, 26 Apr 1966, G. B. Rawlings, PDD 25896.

Boletus novae-zelandiae belongs in sect. Subpruinosi (Singer, 1947) and is closely related to B. rawlingsii. It may be distinguished from the latter by the longer, elliptic-subfusiform spores and narrow, more or less cylindrical cystidia.