Search on : Taxa descriptions


Page number:189 
Description type:Non-original description 
Description:Hydnopolyporus palmatus (Hooker apud Kunth) O. Fidalgo, Mycologia 55: 715. 1963.
Hydnum palmatum Hooker apud Kunth, Synopsis Plantarum 1: 11. 1822.
Polyports palmatus (Hooker apud Kunth) Berk., Ann. Mag. Nat. Hist. 3: 394, 1839. Polystictus palmatus (Hooker apud Kunth) Sacc., Syll. Fung. 6: 253. 1888.
Sporophore 4 cm wide, 3 cm measured radially, essentially dimidiate with a narrow point of attachment, but repeatedly radially fissured so that the pileus has a dissected, fimbriate, finely divided or palmate appearance, especially toward the margin. Pileus glabrous, dark purplish brown at the edge becoming paler and chestnut brown behind, very indistinctly zonate, and with a slight waxy sheen. Pores pale chestnut brown, approximately 6-9 per mm, but elongated radially, with thin dissepiments which become toothed. Hyphal structure of context and dissepiments : trimitic. Skeletal hyphae, 8-10 µm wide, tapering markedly to their free extremity, hyaline, unbranched, often solid and glassy. In Melzer's solution they appear weakly dextrinoid and most have a broad, non-septate lumen; the walls vary from scarcely thickened up to 2 µm wide; a few of the narrower hyphae may appear solid. Binding hyphae, 2-4 µm wide, solid, extensively branched, forming extremely dense coralloid complexes. Generative hyphae collapsed and indistinct. Cystidia none. Spores not seen.
The above description is based entirely on the type specimen collected by Humboldt in Colombia (Magdalena, Boca de Opon). This fruitbody was illustrated by O. Fidalgo (1963, Fig. 6).
This species was transferred to the genus Hydnopolyporus Reid by O. Fidalgo and the epithet palmatus was assumed by him to be an older name for the fungus I described under the name H. fimbriatus (Fr.) Reid. This opinion appears to have been based on a study of a photograph of the type of Hydnum palmatum. It is therefore not surprising to find that Fidalgo's interpretation is erroneous. Hydnopolyporus fimbriatus is a monomitic, rosette-forming fungus, which usually grows from buried wood. In contrast, Hydnum palmatum is a trimitic, dimidiate, lignicolous species, which belongs in the genus Cariolus Quél. Indeed it is identical with the well-known C. membranaceus (Sw. ex Fr.) Pat. from Central and South America, under which name it must be relegated to synonymy.
Taxon name: