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Glossary: P.

Pallid:

Pale in colour.

Parasite: (parasitic):

An organism feeding and living on another living species.

Partial veil:

The web of tissue joining the cap margin to the stem before it fully opens.

Pasteurization:

The process of preparation of bulk material with steam, hot water or a dry heat of between 140-160�F.

Pellicle:

The skin-like covering on the cap of a fungi often gelatinous and which is also separable.

Pencillate:

In the shape of a broom or brush.

Perithecium:

A pear-shaped sac fruit body of some Ascomycetes that surround the asci.

Persistent:

Continuing to exist or recur in spite of interference or treatment.

Phenotype:

The physical characteristics observed from the interaction between the host environment and the genotype.

Photosensitive:

Light sensitive.

Phototropic:

Growing towards light.

Phycomycetes: or Pileus:

The cap of the mushroom.

Pith:

The central part of the stem of some mushrooms.

Pleurocystidia:

The sterile cells on the surface of mushroom gills often called facial cystidia.

Pliant:

Pliable or flexible.

Pores:

The cluster tube openings of the Polypores or boletus.

mycelium:

The uninuclate haploid mycelium that originates from the germination of the spore which is otherwise not capable of producing a sporulating organ.

Primordium (pl primordia):

The first recognizable mass of hyphae mycelium that eventually develops into the mushroom fruit body (pinhead).

Pruinose:

Of a powdery appearance.

Pseudorhiza:

A long root-like extension of the stem.

Pseudosclerotium (pl pseudosclerotia):

A mass of conglomerated mycelium tissue like a sclerotium (fibrous overgrowth) which does not produce a fruit body or any new mycelium growth.

Psilocybian:

Hallucinogentic chemical compound: C12H17N2O4P.

Psilocyboid

Having the appearance and shape of a Psilocybe mushroom. ( e g Stropharia ).

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