New Zealand Journal of Botany abstracts

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Pore width in Heterobasidion annosum (Fries) Brefeld

I. A. HOOD

Forest Research Institute
Private Bag, Rotorua
New Zealand

Abstract Pores in 45 basidiomata of Hetero- basidion annosum from New Zealand (26) and Australia (19) were significantly larger (P< 0.01) than those in 31 fructifications from North Amer- ica (including 30 from British Columbia) and 49 fructifications from Europe (including 44 from Fin- land). The mean distance along lines of 10 contig- uous pores was 4.7 mm (range 3.7-5.8 mm) for New Zealand collections; 4.9 mm (3.8-5.9 mm) for Australian collections; 2.5 mm (1.7-3.3 mm) for collections from North America; and 2.4 mm (2.1- 2.8 mm) and 3.1 mm (2.6-3.6 mm) for collections belonging to two intersterility groups ("S" and "P") from Europe. The fungus in Australasia is therefore taxonomically distinct from forms of H. annosum present in the Northern Hemisphere.

Keywords Heterobasidion annosum; Fomes annosus; pore size; New Zealand; Australia; British Columbia; Finland; taxonomy

Received 28 February 1985; accepted 9 April 1985
New Zealand Journal of Botany, 1985, Vol. 23 : 495-498
0028-825X/85/2303-0495$2.50/0 © Crown copyright 1985

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