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 Add this item to the list  SCHIZOPORA PARADOXA (Schrad.:Fr.) Donk
Page number:288 
Description type:Culture description 
Description:SCHIZOPORA PARADOXA (Schrad.:Fr.) Donk
Mats white, thin, appressed to slightly raised and subfelty to silky or raised and downy to cottony at 2 wk, by 6 wk similar except mats thicker and appressed throughout; margins even, appressed, fimbriate; no odor at 2 wk, absent or unpleasant at 6 wk; no agar discoloration at 2 and 6 wk; not fruiting by 6 wk.
MEA (18-)25-40(-53); (42-)60-85(-90) GAA + or ++++, 0
TAA + or ++++, 0-tr; 0-tr(-20) TyA -, rarely yellow,
Microscopic characters: Marginal hyphae 2-3.5 jim diam, thin walled, nodose septate, sparsely branched, usually branches arising opposite clamps. Submerged and aerial hyphae 1.5-4 µm diam, thin walled, nodose septate, moderately to frequently branched. Cystidia of two types: (a) clavate (Fig.70), 20-35 x 7-10 jun, thin walled, clamped at base, often encrusted with large, coarse, hyaline crystals, numerous in aerial mats of fresh isolates, (b) two-celled, clavate, 6-10 x 3.5-6 jun, thin walled, curved, clamped at base of stalk and at septum between the two cells, terminal cells often staining deeply in phloxine, scattered to abundant in aerial and submerged mats, more numerous in older, appressed cultures. Malocysts globose to pyriform, 6.5 x 4.5-5.5 µm, slightly thick walled, sessile, clamped at base, mucronate, scattered in aerial and submerged mats at 2 and 6 wk.
Sexuality: Tetrapolar (Domanski 1969, p.78; Hallenberg 1983b, p.311).
Cultural descriptions: Domanski (1969, pp.76,81); Hallenberg (1983b, p.311 as S. radula (Pers.:Fr.)Hallenberg); Sen (1973, p.299); Stalpers (1978, pp.93,120).
Species codes: 2.3c.13.31a. 2a.3c. (Hallenberg 1983b, p.311 as S. radula). (Domanski 1969, p.81).
Remarks. --Schizopora paradoxa, commonly known as Poria versi- ora (Pers.) Romell, is associated with a white rot of woody angiosperms and gymnosperms (Lowe 1966; Gilbertson & Blackwell 1985; Ginns 1986a). It is common and widely distributed throughout Canada (Conners 1967; Ginns 1986a) and the U.S.A.(Overholts 1938; Lowe 1966; Shaw 1973; Gilbertson & Blackwell 1985; Gilbertson & Ryvarden 1987). Schizopora paradoxa is treated here as a species complex. Hallenberg (1983b) studied this species complex and concluded that two taxa, S. radula and S. paradoxa, are involved. Most of the cultures studied here appear to be S. radula. The isolates varied somewhat, however, and I cannot with confidence distinguish between the two species. This species is similar to several Grandinia species in culture, especially G. spathulata. Vigorous isolates of S. paradoxa produce clavate cystidia while less vigorous cultures produce two-celled cystidia instead. I have been unable to determine whether this is due to cultural degeneration or to inherent differences between two closely related taxa.
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