When: 2009-09-17

Collection location: Kent Park, Delaware Co., Pennsylvania, USA [Click for map]

Who: Fran Sheldon (Serendipity Fran)

No specimen available

Collected from a mixed hardwood forest, on mossy ground, about 3’ from a large oak tree.

There were some bright red remnants of the outer spore casing on the ground near the stalked spore sac.

The spore sac measures 1.4 cm high by 1.2 cm in diameter. It is rusty red in color with a bright red raised aperture. It is thin, but tough, and was difficult to slice even with a sharp new razor blade. The spore sac is attached to a dark tan colored, spongy stalk, approximately 1.2 cm in height. There is some gelatinous material around the stalk, but not around the spore case.

The spores are cream colored. Most are elliptical, but a few are nearly round.


Large remnant of outer casing.
gelatinous material around stalk is visible after rinsing off dirt and spores

Proposed Names

-25% (3)
Used references: Audubon field Guide to Mushrooms, Lincoff, p 841
Mushroom Expert (http://www.mushroomexpert.com/calostoma_cinnabarina.html)
Based on microscopic features: elliptical spores
38% (3)
Recognized by sight: Looks like a mature specimen.
55% (1)
Recognized by sight
Used references: Species Fungorum name correction

Please login to propose your own names and vote on existing names.

= Observer’s choice
= Current consensus


Add Comment
I defer to Mycowalt
By: Fran Sheldon (Serendipity Fran)
2009-10-05 21:16:34 PDT (-0700)

I just checked my newly acquired Mushrooms of Northeastern North America, Bessette, Bessette and Fischer, and see that C. ravenelii has an elongated stalk. The one on my specimen was just over 1 cm. The spores had not yet released, so it couldn’t be too old, but when I opened the sac, it was clear the spores were mature. So I will gladly, and with thanks, defer to Walt’s experience.

C. cinnabarina and C. ravenelii
By: Fran Sheldon (Serendipity Fran)
2009-10-05 19:59:31 PDT (-0700)

Thanks. I hope that my photos and notes are helpful. Check the link in my references to Michael Kuo’s Mushroom Expert site. He notes that C. ravenelii lacks the gelatinous coating on the spore case that is found in C. cinnabarina. My specimen had some jelly around the underground stipe, but it was not nearly as copious as I’ve seen in photos of C. cinnabarina, and my spore case was clean and dry. -Fran

Excellent notes and images.
By: kate (kate)
2009-10-05 19:20:47 PDT (-0700)

Your notes and documentation rival a text book , very informative. Would you say this specimen is similar to Calostoma cinnabaria? Kate