These were found under CA bay, and very near a group of C. pratensis. There are the same size, and look quite a bit like C. pratensis, but they are completely white. They are non-viscid on cap and stipe. Largent’s Hygrophorus of CA mention some white-capped species that look like C. pratensis: H. cremeicolor has a creamy white cap, and yellow gills; H. angustifolius is all white but with small sized spores; and H. berkeleyi is ivory colored (not sure how to tell the difference between white, ivory and cream really…), but is moist and slightly viscid. These were slightly damp, and really non-viscid, and all white, really white-white. That suggests H. angustifolius, but Larget remarks that it is rare, he didn’t find it, and he only lists it from Hesler and Smith who mention it under redwoods in coastal CA.

3/3/2008 – looking at this some more here, and got some of it under the scope. The first micro-shot here is of a gill section, at 100x in KOH. Sorry about the quality of the photo, I’ll get better, but here you can see the basidia on each side of the section, and the inter-woven trama in between. The second micro-shot is on the spores at 1000x in KOH. Haven’t figured out how to get this is focus just yet, but you can see spores enough here. They are sub-globose to drop shaped. Measuring 10 spores, the ave size is 5.85 × 4.7 um. This makes these Camarophyllus, but still not sure about the species. They were found near C. pratensis, and they were very common. The spore size is consistant with that species, and these might be albino versions of these. But the shape of the spores, and macro-features are consistant with C. angustifolius, although the spore size is at the large end of the size ranges for that species. Also C. angustifolius has only been describe by Hesler and Smith, and hasn’t been seen since, so I don’t know here.

I now have to go and look at C. pratensis and compare.

3/6/2008 – Now having gone a looked at details on C. pratensis, the difference is the color, which is pure white here, and there is a difference in the spore shape and size. The spores are smaller, but I’m not sure how consistant this is really. But also the spore shape is different, here they are more tear-drop shaped, where in C. pratensis the spore are more elliptical. And that is the main difference as sited in Largent’s Hygrophorus of CA.

Personally, I’m not entirely certain, but there is a difference, and the difference is exactly what is stated in the monograph, so I’m going to go with it. But you could say that these might just be an albino variation of C. pratensis. Also I wasn’t as careful about the spore size as I could have been, and more should be done with more spores and use of Congo Red to have a careful measurement here. But I think I’m going to move on, and leave it as this, others can borrow the dried samples for further study if needed.

Species Lists


Proposed Names

-1% (2)
Based on microscopic features: Hyline, inamyloid spores, with interwoven lamellar trama.
63% (3)
Based on microscopic features: Smaller, tear-drop shaped spores.

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= Observer’s choice
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