CA, Southern California, 20070325
Madison Heights, two LBMs. 

Nice exercise comparing these two very similar mushrooms.  Morphologically, the fibrils on the Psathyrella are very reliable esp when young  they disappear only in rather old age, until then there's always at least some hanging from the margin.  And these have been subjected to sprinklers nightly.

Spore prints, seen edge on to accentuate color difference.  (Darker is Panaeolus foenisecii, lighter is Psathyrella candolleana.)Spore prints.  (Darker is Panaeolus foenisecii, lighter is Psathyrella candolleana.)Spores, at 400x. Spores, at 400x. Even younger one, knocked over.  Shows fibrous veil breaking nicely. Nice young one, knocked over.  Shows fibrous veil breaking nicely. Two nice ones, quarter view, shadier. Drying cap, side view.  Nice demonstration of hygrophanous color change. Few nice ones, knocked over. Few nice ones, side view. Few nice ones, quarter view. Several nice ones in lawn. 

Psathyrella candolleana [] 

Opposite Fillmore on W side of Marengo, in lawn just to roadward of sidewalk.
 GEN small mushroom, loosely clustered, in lawn
 ST straight, 4-5mm thick, fibrillose but fragile, whitish, min fibrillose esp ab, catching spores near top
 FL thin and fragile, pale
 CAP rounded, cinnamon, solid when damp but becoming pale in patches starting in center when dry (hygrophanous), scattered whitish fibril patches esp when young and esp around margin, otherwise smooth
 GILL whitish becoming darker with age, adnate, dk brown dusting of spores, a gritty-dusty appearance
 SPORE print dk brown, brown, smooth, ellip or bean-shaped, apic, dry, 6.8-7.4um long

Spore prints, seen edge on to accentuate color difference.  (Darker is Panaeolus foenisecii, lighter is Psathyrella candolleana.)Spore prints.  (Darker is Panaeolus foenisecii, lighter is Psathyrella candolleana.)

Panaeolus foenisecii [] 

One house south of Fillmore on W side of Magnolia, in lawn between sidewalk and road.  (Also on other side of street and all over on W side near Alpine).
 GEN small mushroom, loosely clustered, in lawn
 ST straight to sl tapered down, off white to brownish, v min scurfy-fibrillose, v fragile, white fuzz just under ground
 CAP conical to rounded, smooth, naked, brownish to brown  highly variable color, hygrophanous
 GILL adnate, brown, mottled, grainy in appearance
 SPORE print v dk brown but not quite black, ellip to sl ovate, weakly textured, term pore, 13-14um long

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Last changed on August 17, 2007