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studies are completed, the taxonomy of this group is unlikely to be further resolved by macroscopic or microscopic analyses.

Description: Shar~g the general shape and appearance of P. ostreatus except the primordia are bright reddish ("salmon-egg") pink, becoming ] :nkish as mushrooms develop, eventually a dull pinK to ight pinkish cinnamon colored and often faJing to straw-colored when over-mature. (The color transitions are not only age-dependent, but vary between strains and are influenced by light conditions.) Cap convex expanding with age to broadly convex to plane. Cap margin inrolled at first, then incurved, and eventually flattening and upturning at maturity. The gills are particularly strongly pigmented with pinkish tones when young, fad ng to a creamy beige in age. Commonly growing in clusters of multir>le mushrooms. When cultivated, variants often appear from the same fruiting container as the pink forms. These variants range i 1 color from beige to cream to white, usually with white to gray gills, and often with a 1 ghly undulating, scallop-like cap margin

Distribution: A tropical mushroom complex, widespread throughout the tropics and subtropics Mushrooms from this group have been collected in Thailand, Cambodia, Singapore, Vietnam, Ceylon Malaysia New Guinea, North Borneo, Japan Brazil, Mexico and theAntilles.A pink Oyster mushroom from Amazonia probably belongs to tllii species complex.

Natural Habitat: Preferring tropical and subtropical hardwoods including palms, rubber trees, and also found on bamboo

Microscopic Features: From the same fruiting column, I obtain pink spores from pink mushrooms

figure 271. The Pink Oyster mushroom fruiting from bags of sterilized sawdust in Thailand.

Figure 272. A variety of the Pink Oyster mushroom vMich produces unusually large mushrooms from columns of wheat straw.

and light beige spores from mushrooms that were originally pink but faded to cream beige Spores measure 6-10 x 4-5 fj, smooth, and cylindrical^ shaped. Clamp con nections present. Cheilocystidia present. Pleurocystidia absent. Hyphae arranged dimitical'y.

Available Strains: The body of strains available from this complex is tiind-bogglinj American Type Culture Collect on has several cultures, of which ATCC # 34552 (called "ij salmoneo-stramineus") is a fruiting strain (See Figure 272). A strain I have in my culture collection grows extraordinary quickly, pic ducing mushrooms 10 days after inoculation onto pasteurized wheat straw. Cultivators should note that these cultures are often identified by any of the above mentioned names in the discussion of the taxonomy of this mushroom complex

Mycelial Characteristics: White at first cast-

ove^runwiinton\ m "ngri zomc- pfcfeventuallycottonywithmaturity, anc a~rial. 4o strains soon evelop strong pi bsh tones, especially asthemyceliu batons, at anclarc m be sites of pn-

ZZ^oZ ov faming pink ; Ha ften form as cluster colonies along the inside penphe!y

™hepetri lisha, Vor around th ite fir iculation. (See Figure 270). As grain (rye) spawn mature , pCSp. ■ m mycelia can predominate. A milky gray metabolic exudate collects at the bot-

torn of the incubation containers.

Fragrance Signature: At first, the fresh mycelium is similar to Pleurotus citrinopileatus. the Golden OvlrMushr-om ii it its f .granc isac id and has a peculiar*,* "ton After prolong* storage, the spawn and/oMnu• c oms develop a rc ' i 'ike odor Once dried, the mushrooms impart a more pleasant fragrance.

Natui al Method of Cultivation: This mushroom can be cultivated on dv rod stumps and logs I tn torsir . fou i that lis species quickly colonizes unpasteurized cereal straws before contaminants emerge

Recommended Courses for Expansion of Mycelial Mass to Achieve ruiting: Ci iltures in petn disbe cutc it, :nted in a h: h speed blender, arid used to generate grain sp Liquidm-ocukteT 1/2 ga on grain jars are fully grown through ii 4-5 days. However, th spawn must be continual 1 expand o esen v ;o an uality. Liquid-inoculated Grain Masters can be ex-

Figure 272. A variety of the Pink Oyster mushroom vMich produces unusually large mushrooms from columns of wheat straw.

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