10/08/2019
Hello California Mushroom Hunters!
I received this message today from Dr. Tom Brun's UC student Saumitra Kelkar. He is looking for well documented collections of CA candy cap-like Lactarius species in subgenus Russularia. He is aware that these are found later in the season, but wants to get the word out now. For MO users, I did mention that some of us prefer to use that site over iNat for posting observations, for oh so many reasons.
Here's his message:
Hello,
I'm a fourth-year student at UC Berkeley studying forestry, and I'm doing my undergraduate honors thesis on the diversity and phylogeny of Lactarius subgenus Russularia in California.
According to Methven's 1997 chapter on Lactarius in "Agaricales of California," there are 16 species in Lactarius subg. Russularia known to occur in California. Of these, only the candy caps, Lactarius rubidus and rufulus, are well-represented in GenBank from samples collected in California. The goals of my project are to determine which of the 16 species in this subgenus that are reported to occur in California actually occur in California, whether mushrooms in this subgenus in California are truly members of the species they key out to, and how members of Lactarius subg. Russularia in California relate to each other.
This project will require more sampling than I can expect to do on my own in one season. To complete this project, I'll need help collecting mushrooms and recording morphological features in fresh specimens.
Lactarius subg. Russularia is characterized by small, orange to reddish-brown basidiomes that do not stain green, are not hairy, and have white to whey-like latex.
If you find some mushrooms in Lactarius subgenus Russularia you'd like to donate to the cause, please do the following:
1) Post photos to iNaturalist that clearly show the top of the cap, the gills and underside of the cap, and the entire mushroom, including the base. Please include in the photos something of a standard size (like a coin, or better yet, a ruler) for scale. Include in your post the location, date, and habitat details (ecosystem type, dominant plants/trees).
2) Record the following characteristics of the mushroom: size (cap diameter, stipe width and length), color changes when damaged, texture, latex color when freshly exuded, latex color on white paper
2) Dry the samples
3) E-mail me at [email protected] and I'll give you my shipping address. I can reimburse you for shipping expenses.
To this e-mail, I've attached the sections of Methven's chapter in "Agaricales of California" that include the key to subgenera of Lactarius and species descriptions of Lactarius subg. Russularia.
You can email me at [email protected] or message me on facebook if you have any questions. I'm quite new to mycology, so if there's anything you think I should know, please don't hesitate to tell me about it!
Thanks in advance!
Cheers, and happy mushroom hunting!
Saumitra Kelkar
Here is a list of Lactarius species of interest:
Subgenus Russularia
Section Pseudo-Aurantiaci
L. substriatus
L. subviscidus
Section Russularia
L. atrobadius
L. desjardinii
L. luculentus var. laetus
L. riparius
L. rujus
L. subflammeus
Section Subsquamulosi
L. alpinus var. mitis
Section Thejogali
L. occidentalis
L. rubidus
L. rufidus
L. thiersii
Section Triviales
L. cocoseolens
L. hysginus var. americanus
L. manzanitae