MERULIUS IN NORTH AMERICA! 
EDWARD ANGUS BURT 
Mycologist and. Librarian to the Missouri Botanical Garden 
Associate Professor in the Henry Shaw School of Botany of 
Washington Unwersity 
MERULIUS 
Merulius Haller, Hist. Stirp. Helvetiae 3 : 150. 1768, emend. 
Fries, Syst. Мус. 1: 326. 1821; Elenchus Fung. 1: 56. 1828; 
Еріст. 499. 1838; Hym. Eur. 591. 1874; басс. Syll. Fung. 
6:411. 1888; Engl. & Prantl, Nat. Pflanzenfam. I. 1**: 152. 
1898.—Serpula as a section of Merulius Persoon, Syn. Fung. 
496. 1801.—Xylomyzon Persoon, Мус. Eur. 2:26. 1825. 
Fructification formed from a woven, mucedinous mycelium, 
covered with the continuous hymenium which is usually waxy- 
soft, reticulated on the surface with obtuse folds, incompletely 
porose, at length gyrose and obsoletely toothed. 
The fructifications grow on wood usually, although some 
species occur on the ground, are soft and mucedinous, and 
dimidiate, reflexed or resupinate. Many reflexed species may 
be found resupinate also. The spores are distinctly och- 
raceous or white in most species, but have only the slightest 
tinge of color in several intermediate species; the basidia 
are simple; cystidia are present in a few species. 
Merulius is closely connected on one side with Coniophora, 
Согисит, Peniophora, and Stereum of the Thelephoraceae 
and on the other side with Рота. If one has an immature 
specimen only, it may be difficult to decide whether it is a 
Merulius, but fully mature specimens have the hymenial sur- 
face distinctly reticulate with obtuse folds imperfectly porose 
1 Issued. December 8, 1917. 
Note.—The technical нека erms used in this work are those of Ridgway, 
Color мол and Nom Lave dem Washington, D. C., 1912. With regard to 
the citation of иа», all except those of “Exsiccati” are in Burt Herbarium, 
ich are cited withou gne reference to place in other herbaria. 
Vac the TE of Merulius americanus cited “Louisi iana, “aA „мера 
A. nglois, 1590,” is in Burt Herbarium. The data given is that rece 
wit o tho specimens в and may identify duplicates in another herbariu = The tie 
tion of all specimens in ет herbaria than my own is designated by giving іп 
parenthesis the name of the herbarium preceded xi "in." For example, the 
specimen of the same d ies cited “Wyoming, Medicine Bow Mts., A. Nelson, 
9673 (in Мо. Bot. Gard. Herb., m e idi is in Missouri Botanical Garden Her- 
barium, but not in Burt Herbar 
ANN. Mo. Вот. GARD., VoL. 4, 1917 (305) 
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