North American species of Hygrophorus / L.R. Hesler [and] Alexander H. Smith.

114 SECTION HYGROCYBE
from the base, finally entirely carmine or cherry red, and with all parts
blackening. It has distinctly narrower spores than typical H. conicus.
Haller (1953) has described a new species, H. conico-palustris, which
is distinguished by a small, papillate, striate pileus, and blackish pseudocystidia on the sides of the lamellae.
49
Hygrophorus erinaceus Pat. sensu Petch
Bull. Soc. Mycol. France 25: 10. 1909
Hygrophorus conicus var. peradenyca Sacc., Syll. Fung. 5: 418. 1887.
Hygrocybe erinacea (Pat.) Singer, Sydowia 12: 225. 1958.
Pileus up to 3 cm broad, conic with an acute umbo, then coniccampanulate, pale smoke gray or barium yellow, streaked with black
fibrils, blackening throughout when touched. Context gray or yellow,
blackening, thin, soft, hygrophanous.
Lamellae free, white, blackening, subdistant, broad, lamellulae
present.
Stipe white to pale smoke gray, blackening, fibrillose, equal, hollow.
Spores 10 x 5 I when broadly ellipsoid to 7-6 It when subglobose
on the same gill, white in deposit. Basidia 30-40 x 7-11 vx, 4-spored.
Gill trama parallel, their hyphae forming a sterile edge.
HABIT, HABITAT, AND DISTRIBUTION-In bamboo plantation, Trinidad, September-October; and Mexico.
MATERIAL STUDIED-TRINIDAD: Dennis 72.
OBSERVATIONS-Dennis (1953) indicates a relationship of this fungus to H. conicus, as Saccardo had done; but the tendency to bear
subglobose spores indicates an approach to H. erinaceus Pat. Singer
(1958) has recently reported this species from Mexico.
Notes on Dennis collection No. 72: Spores 6-10 x 5-7 JL, ellipsoid,
subglobose, globose, or broadly ellipsoid, smooth, yellowish in Melzer's
reagent. Basidia 28-40 x 8-10 Et, 1-, 2-, and 4-spored. Pleurocystidia
and cheilocystidia none. Gill trama parallel, hyphae 5-7 vU broad. Cuticle not sharply differentiated, surface hyphae numerous, repent, semirepent, or somewhat erect, broad (6-18 t), pale fuscous, with a few
clamp connections. Lactifers present in the pileus trama.
50
Hygrophorus calyptraeformis Berk. & Br. apud Berk.
Outl. Brit. Fungol., p. 202. 1860