Hyphodontia pallidula

(Bres.) John Eriksson 1958, Symb. Bot. Ups. 16(1):104.

typus generis!

= Gonatobotrys pallidula Bres. 1903: Ann. Mycol. 1: 127.
= Gloeocystidium pallidulum (Bres.) v. Höhn. & Litsch. 1908: Austria. Bot. Zeitschr. 58: 471.
= Peniophora pallidula (Bres.) Bres. apud Bourd. & Galz. 1913: Soc. Myc. Fr. Bull. 28: 390.; Holotypus: Poland, on branches of Betula ans Pinus, leg. Eichler, in Herb. G. Bresadola, Herbarium FH.
= Peniophora laminata Burt 1926: Ann. Miss. Bot. Garden 12: 246.
= Gloeocystidium oleosum v. Höhn. & Litsch. 1907: K. Akad. Wiss. Wien Math.-Nat. Kl. Sitzber. 116(1): 827, (fide Rogers & Jackson 1943).

Select illustration:

Makromorphology:

Resupinate, smooth to verruculose, young white, old cream-coloured to yellowish, margin thinning out, up to ca. 250 µm thick, under a hand lens (10 x) pilose because of protuding cystidia. Colour photo in Breitenbach & Kränzlin (1986), picture No. 84.

Micromorphology:

Spores:: 3,5-5 x 2,5-3 µm, ovoid, smooth, thin-walled, inamyloid, with one droplet each
Basidia:: 12-18 x 3-4 µm, suburniform each with a basal clamp.
Sterigmata:: four, up to 3 µm long.
Cystidia:: 1. septocystidia, 80-300 x 4-6 µm (diameter meassured without clamps), thick-walled (up to 0,5 µm). The thick-walled part is waisted in irregular distances and is septated. The clamps of the septa are thin-walled. The capitate end of the cystidia is strongly covered with granular exsudate (dissolvable in a 5% KOH solution), but is visible in a microscopic slide mounted with with water. At the basal part of the thin-walled, capitate hypertrophy additionally a strong refringent ring of homogeneouse exsudate is visible. The Septocystidia arise from the subhymenium oder subiculum.
2. very seldom there are found lagenocystidia (compare H. alutaria).
Hyphae:: Hyphal system monomitic. Subhymenial hyphae thin-walled, 3-4 µm in diameter, very dense hyphal branching. Basal hyphae thick-walled (up to 0,5 µm), 2-3,5 µm in diameter, loosely branched. Hyphal branching by subseptal outgrowing or outgrowing of clamps.

Habitate and Substrate

Coniferous and deciduous forests. Conifers: Abies, Picea, Tsuga, Larix, Pinus. Deciduous wood: Alnus, Betula, Fagus. Also Phellinus sp. is reported as substrate.

Biogeography

The specimen, which are examined in this case, represent only a little choice of the plentiful material in the herbarium GB. Collecting sites are spread over the northern hemisphere including areas of moderate or temperate climate.

Remarks

H. pallidula could be mixed up especially with H. alba, H. alutaria and H. propinqua . Each of the four species has septocystidia with a changing number of primary septa.

Septocystidia with 3 or more cells

  Spores shorter than 3 µm

    Spores more narrow than 3 µm............H. pallidula

    Spores  wider than 3 µm.................H. alba

  Spores longer than 6 µm...................H. propinqua

Septocystidia with not more than two cells

  Hymenium smooth to a little bit bumpy.....H. alutaria

examined Herbarium specimens

Norway, Nord-Trøndelag, Nordli, Storbekken forest reservat, ca. 4 km east of Sandsjøn, on an old fruit body of Phellinus sp., leg. L. Ryvarden, 08.08.1973, LR 12167, Herbarium O.
Sweden, Värmland, Millesvik, Bärön, on a dead branch of Alnus glutinosa, leg. T. Hallingbäck, 15.09.1974, Herbarium GB.
Sweden, Västergötland, Långared, westside of the Anten (lake), on the decaying wood ofPicea abies, leg. K. Hjortstam, 29.09.1970, Hjm 3794, Herbarium GB.
England, Durham, Eden Castle Dene, auf Fagus sp., leg. L. Ryvarden, 18.09.1971, LR 8286, Herbarium O.
Poland, on branches of Betula and Pinus, leg. Eichler, in Herb. G. Bresadola, Herbarium FH.
Germany, Hessen, Zwesten, Altenburg, ca. 250 m alt., on wood of Pinus sylvestris, leg. E. Langer, 03.10.1990, GEL 2204, Herbarium G. & E. Langer.
Germany, Hessen, Zwesten, Altenburg, ca. 300 m alt., on wood of Picea abies, leg. E. Langer, 20.11.1989, GEL 2097, Herbarium G. & E. Langer.
Romania, Suceava, Codrul Secular, Slatioara, on Abies sp., leg. N. Hallenberg, M. Toma, 16.10.1983, NH 8044, Herbarium GB.
Spain, Lerida, north-east of Viella, Abies-Wald, on Abies-Ast, leg. N. Hallenberg, 14.11.1986, NH 9999, Herbarium GB.
Canada, British Columbia, Vancouver island, forbidden plateau, subalpine jungle, on branch of Abies amabilis, leg. B. & J. Eriksson, W. Ziller, 28.09.1967, Herbarium GB.
USA, Montana, Glacier national park, Quartz Creek, on Pinus contorta Dougl., leg. R.L. Gilbertson, 26.07.1966, Nr. 6362, Herbarium GB.
China, Jilin, Chang Bai Shan, Huang Song Pu, 1200 m alt., on Larix olgensis, leg. L. Ryvarden, 11.17.09.1983, LR 21463, Herbarium O.
China, Jilin, Chang Bai Shan, Bai Shan, 1100 m alt., on Abies nephrolepis, leg. L. Ryvarden, LR 21628, Herbarium O.
Taiwan, Ho-Hwan-San, Taroko national park, ca. 2800 m alt., forest of Abies kawakamii andTsuga chinesis, on brown-rotten cinifers wood, leg. E. & G. Langer, F. Oberwinkler, 05.07.1990, FO 42252, Herbarium F. Oberwinkler.

References

Breitenbach, J., Kränzlin, F. 1986. Pilze der Schweiz. Band 2. Heterobasidiomycetes, Aphyllophorales, Gastromycetes. Verl. Mycologia, Luzern. 416 Seiten.
Rogers, D.P., Jackson, H.S. 1943. Notes on the synonymy of some North American Thelephoraceae and other resupinates. Farlowia 1(2): 263-328.

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Dr. Ewald Langer - 22. Aug. 1995
gelanger@mailserv.zdv.uni-tuebingen.de