Cambridge, Mass. On Prof. Kellner's lawn, Phillips Place and Berkeley St. Under pine trees, in sparse shade-grass. (Poa trivialis)
September 9, 1907
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[Spores] 3.5-4 x 6-6.4 microns
Pileus 2.3-5 cm. broad, whitish, changed to bright Indian Yellow when touched, clothed with dull-reddish-brown exceedingly find loosely scattered appressed hairs (squamulosely hairy, not virgate) that are denser on the flattened or slightly depressed disk; flesh rather thin, not quite 4 mm. in center, thinning out toward the margin, persistently white, only a very faint trace of yellow developing in the base of the stem. Gills close, irregularly unequal, free, broader anteriorly than posteriorly, about 4.5 mm. at broadest part, of a beautiful light-grayish-pink at first, changing to a light-grayish-chocolate color, staining white paper a deep Indigo Blue (as Atkinson notes). Stem 3.5 to 4 cm. long, about 5 mm. thick above, thickening to 7-8 mm. at the base, gracefully curved, finely hollow, but stuffed with a soft silky pith; surface, below the ring, covered with very fine soft fibrils that turn to bright Indian Yellow when touched, above the ring, shining and silky-fibrous. Veil extremely thin and delicate, median, pendulous, about 4 mm. long, remains of it attached to the margin of the pileus. Spores 6-6.4 x 3.5-4 microns.
The large specimen figured was the largest found. Apparently this species grows no larger. Lloyd says that the diameter of the pileus never exceeds 5 cm.
The egg-yellow color, at first appearing only where the plants are touched, soon extends over the entire surface of pileus and stem.
A pronounced, but evanescent, amygdaline odor was noticed in freshly broken plants.
Louis C. C. Krieger
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The content of these records were transcribed from the original handwritten information, and although every attempt was made to do so accurately, we cannot guarantee the accuracy of the transcription or the accuracy of the original information.
Common names were obtained from the following sources:
Miller, Orson K. and David F. Farr. An index of the common fungi of North America, synonymy and common names. Vaduz [Liechtenstein]: J. Cramer, 1975. 206 p.
Lincoff, Gary. The National Audubon Society field guide to North American mushrooms. New York: Knopf: Distributed by Random House, c1998. 926 p.
Smith, Alexander H. The mushroom hunter's field guide. Ann Arbor: Univ. of Michigan Press, c1980. 316 p.