REVISION OF THE NORTH AMERICAN HYDNACEAE 118 
command and Persoon’s earlier work was forgotten. Afterward 
Fries, Epic. 511, removed from his genus H. caput- Medusae and Н. 
ramaria and remanded them back to their association with Æ. coral- 
loides in the tribe Merisma of his genus Hydnum. Fries consid- 
ered the possibility of regarding the group thus brought together 
as a distinct. genus but abandoned it. In 1878 Quélet in the 
Clavis Hymenomycetes published by himself in association. with 
Cooke, suggested treating the tribe Merisma of Fries as a group of 
generic rank and proposed the name Zryodoz for it but failed to 
establish the genus according to modern criteria. Тһе next year 
Karsten, not knowing of Ouélet's suggestion, established the genus 
friesites for substantially the same group.* But in 1881, having 
in the meantime seen the Clavis Hymenomycetes of Cooke and 
Quélet, he took up the name Dryodon suggested by Quélet and 
substituted it for his own Z77zesztes thus giving the genus Dryodon 
a proper publication. By the latter name the group has generally 
been known when it has been recognized. At an earlier date, 
however, Chevallier, 1826, established the genus Medusina on two 
species, М. patula = Hericium Erinaceus (Bull.) and H. coralloides 
(Scop.) The law of priority requires that we should reinstate the 
older Hericium of Persoon. 
Synopsis of Species 
Pileus н branched ог tuberculiform, light-colored, whitish at least when young. 
Pi ore or less branched to the base. 
Tee th covering the underside of all branches even to the base. 
.-Н. laciniatum, 
Teeth chiefly on the ultimate branches, usually long and MES 
2. H. coralloides. 
Plant more or less ззаду or tuberculous. 
lant tuberculous ; teeth pendent directly from the body. 4. М. Erinaceus. 
Plant aka aai, teeth pendent from short peripheral үе 
H. гар ursi. 
Pileus a resupinate subiculum of concrescent tubercles or wanting, и пода to buff. 
ant of many coalescent tubercles with pendent teeth, yellow to orange. 
Spores oval 3.6 by 5.5 и, teeth compressed or terete, often фана 
H. croceum. 
Spores oblong curved, 2.7 by 4.5 и; teeth flattened, fimbriate, simple. 
mobriatum. 
Plant сори of a single fascicle of teeth with little or no са, whitis 
H facilis. 
* It is unfortunate that this circumstance should thus render it impossible that the 
greatest of mycologists should have the one genus dedicated to his honor which tradi- 
ion asserts was the inspiration to his life work. 
