Collection location: Santa Barbara Co., California, USA [Click for map]
On Juniperus californicus along Santa Barbara Canyon Road, southeast of Cuyama Valley.
Thallus indeterminate, light gray, dull, scarcely present. Apothecia adnate, dark brown black, dull, epruinose, quickly convex with a persistent but thin thalline margin. Epihymenium red brown, POL-. Hymenium and hypothecium hyaline, the latter slightly dirty. Paraphyses not conglutinated, branched at tip, with a dark apical cap.
Spores Type A development with young spores showing no apical swelling. 1-septate, brown, ellipsoid, often bean-shaped to somewhat attenuated, Physconia type. Initially with an apical swelling and angular lumina, but lumina becoming round then filling the space so mature spores have no or very little apical swelling. In K the setpa swell slightly, septal thickening minimal. Average size 14.0×6.6µm (n=13)
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Seems every Rinodina I examine is different from the last microscopically. I’ll note your reservation and see if I can get more.
Unfortunately there seem to be a few things with small barely-physconia-type spores. I wonder which form represents true R. pyrina? The more common form I encounter is a tiny scattered, ±shiny thing. Or is it just a really variable species?
Created: 2018-06-14 15:09:24 CDT (-0400)
Last modified: 2018-06-16 12:55:05 CDT (-0400)
Viewed: 31 times, last viewed: 2019-08-23 13:46:56 CDT (-0400)