Collybia confluens

Collybia: white to pink spores; cartilaginous stipe; pileus and/or stipe dry or lubricous, never glutionous or viscid. Stature: collybioid.

Typically species of Collybia are typically collybioid, are terrrestrial, do not have olivaceous or green colors nor dark gray, gray-brown, or black colors, typically do not have a strong odor or a velvety stipe, and have white spores. Caulorhiza with a radiacating stipe and Microcollybia with small fruiting bodies which occur from remains of other fruiting bodies or originate from a sclerotium (looks like a small seed), and Rhodocollybia which have pinkish spores are still considered species of Collybia.

Almost all Collybia species are not omphalinoid. Collybia is always separated from Marasmius and from Mycena by its pileipellis and stipitipellis which is entirely a cutis; whereas in Marasmius, the pileipellis or the stipitipellis is a derm of some sort and in Mycena the pileipellis typically has a layer of inflated cells immediately beneath the outer layer of the pileipellis.

In addition, species of Marasmius have a insititious and tough or wiry stipe. See Mycena for a discussion of its field characters.

Genera which have been segregated from Collybia and which are acceptable for Botany 360 are:

Baeospora: grows on cones, thin, close to crowded gills; amyloid spores

Callistosporium: the fruiting bodies have very distinct colors, olivaceous to green colors mixed with browns or yellow browns; once the species are identified, they are easily recognized in the field. Callistosporium is characterized by its spores and hyphae which have internal, reddish, bodies.

Caulorhiza: often with a long radicating stipe; stipe often quite broad and typically with a cartilaginous rind and a fleshy to hollow center; it our area the pileus and stipe are concolorous and light reddish-brown and the fruiting bodies are typically found in forests dominated by Coast Redwood.

Fayodia: pileus dry; pileus and stipe are uniformly colored grayish or brownish; the gills are white and either emarginate or decurrent. The genus is characterized by its cyanophiolus warty or spiny spores.

Flammulina: has a velvety stipe; pileus is often

Macrocystidia: dark brown or reddish brown pileus; typically with a fishy or strong, cucumber-like odor. The odor and the color are good field characters. The genus is recognized by its round, cyanophilic spores and its large gloeocystidia in the hymenium.

Myxomphalia: pileus oily, depressed or umbilicate over the center; pileus dark brown to dark gray-brown, translucent-striate, and strongly hygrophanous; gills are white or sordid gray. Habit: in burned over areas. It is recognized by its slightly warty to nearly smooth, amyloid spores.

Microcollybia: small Collybia-like species which either are terrestrial and grow from a scleortium or are fungicolous (grown out of other fruiting bodies); this genus is not accepted by most mycologists.

Rhodocollybia: Collybia-like species with pinkish cream to pinkish buff spores; most agaricologists consider this genus to be congeneric with Collybia.

Strobilurus: grows on cones, moderately broad, subdistant gills; inamyloid spores

Tephrocybe: Collybia-like species with dull grayish, grayish brown, or blackish colors. Pileus moist and translucent-striate. Often with strong, fishy or farinaceous odors. It is characterized by its siderophilous basidia.