LX M env 
| ; 
Annals 
of the 
Missouri Botanical Garden 
Vor. 5 SEPTEMBER, 1918 No. 3 
THE THELEPHORACEAE OF NORTH AMERICA. ТХ! 
ALEURODISCUS 
EDWARD ANGUS BURT 
Mycologist and Librarian to the Missouri Botanical Garden 
Professor in zu Henry Shaw School of Botany o 
'ashington University 
ALEURODISCUS 
Aleurodiscus Rabenhorst, Fungi Eur. Exs., 1824 (without 
diagnosis). 1874; Hedwigia 13 : 184 (without diagnosis). 1874; 
Schroeter, Krypt.-Fl. Schlesien 3 : 429. 1888; Engl. & Prantl, 
Nat. Pflanzenfam. (1.1**):120. 1898; Patouillard, Essai 
Taxon. Hym. 52. 1900; v. Höhn. & Litsch. К. Akad. Wiss. 
Wien Sitzungsber. 116 : 793. pl. 1-4. 1907; Bourd. & Galz. Soc. 
Мус. Fr. Bul. 28: 349. 1913. 
Fructifications resupinate, sometimes with margin free all 
around and somewhat saucer-shaped, rarely dimidiate and 
attached by the base, drying coriaceous; hymenium pulver- 
ulent; paraphyses noteworthy, modified into forms such as 
moniliform, or racemose by presence of short lateral branches 
—these paraphyses are sometimes called dendrophyses; 
granular or crystalline matter often in great quantity between 
the basidia, paraphyses, and hyphae of the fructification; 
basidia simple, usually large and with four large sterigmata; 
spores simple, usually large, with colorless cell wall. 
The type species is Aleurodiscus amorphus (Pers.) Rabenh. 
originally published as Peziza amorpha by Persoon, then 
transferred to Thelephora by Fries when known to be a basid- 
1 Issued September 20, 1918. 
ANN. Mo. Вот. GARD., VoL. 5, 1918 (177) 
