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Page number:61 
Description type:Non-original description 
Description:Polyporus macowanii Kalchbr. in Grevillea 10: 54 (1881). Plate 8H
"Pilei tenuis, submembranacei, effuso-reflexi, imbricato-concrescentes, pubescentes, albi; pori minimi, curti, rotundi integri, fusco- vel nigrocantipurpurei, ore albo-irrorati.
Somerset East, Boschberg (MacOw.), No. 1085.
Pileoli 2 cent. et ultra longi lati que, vix 1 mm crassi; margine sterili, acuto; spurie concentrice zonato. A. Pol. nirgro-purpureo Schwein., qui durus, - tenuitate a Pol. dichroo Fr., colore pororum differt."
"Pileus thin, submembranaceous, effuso-reflexed, imbricate-concrescent, pubescent, white; pores small, short, round entire, dark- or blackishpurple with white sprinkled mouths.
Somerset East, Boschberg (MacOw.), No. 1085.
Pileoli 2 cm and more long and wide, scarcely 1 mm thick; margin sterile, acute; falsely concentrically zonate. From Polyporus nigropurpureus Schwein., which is hard - thinner, from Polyporus dichrous Fr., differing in colour of the pores."
Sporophores consisting of imbricate, dimidiate brackets arising from a resupinate sterile waxy portion. The pilei are 0,4-2,5 cm wide and about 1,0 cm from point of attachment to the margin; they are thin and covered by an ochraceous buff felt. Pores grey and separated from the flesh by a thin black horny line. Hyphal structure monomitic, consisting of generative hyphae, 2,5-3,0 v wide, with distinct walls but retaining a wide lumen, and with clampconnexions at the septa. There is a very distinct hymenium lining the tubes, the walls of which seem to be formed of more or less gelatinized hyphae. Spores 4.0-5,75 x 2,0-2,21 µm, thin-walled, hyaline, elliptic and scanty.
This fungus has to be relegated to synonymy under Bjerkandera adusta (Willd. ex Fr.) Karst. as noted by Lloyd (1915), Van den Byl (1924) and also by Talbot on the type packet at K. Saccardo (1888) and Wakefield (see Doidge 1950) both thought it was more likely to be P. dichrous Fr. but the spore size and shape preclude this interpretation.
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