| Holotype: Lecanora simeonensis K. Knudsen & Lendemer |
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Description: Thallus yellow-beige, matt,
warted-areolate, warts coalescing to form a rimose crust, sorediate, arising from a white
prothallus, apothecia rare; warts irregular in shape, convex, often lumpy, sometimes
incised, 0.1-0.4 mm across, young thalli thin and dissolving into soredia; in older thalli erupting
in capitate soralia or apothecia. Soredia yellow to green-tinged, usually occurring
in capitate soralia, mostly 0.5 mm wide; young soredia mostly 0.01 mm in diameter, poorly
differentiated, algae entwined with colorless hyphae 2 µm in diameter; older soredia in
capitate soralia mostly 0.4-0.5 mm in diam., with 1 or 2 layers of paraplentenchymatous hyphae
with cells mostly 2 µm in diam. enclosing an algal core. Cortex of paraplectenchyma,
colorless, cells 8-10 µm wide; composed of 2-10 layers of hyphae.
Medulla of colorless hyphae mostly 2 µm in diam. Algal layer +/-
discontinuous. Strata only well-differentiated in older warts. Apothecia
round, broadly attached, scattered or in small groups among soralia, or usually absent, maximum diam.
0.75 mm, most apothecia 0.3-0.5 mm; disc plane to convex, dark green or beige, often with
+/- yellow pruina; margin thin to relatively thick, concolorous with thallus,
becoming excluded when the apothecia become convex. Amphithecium colorless within, outer
surface same color as disc, +/- with yellow pruina, 20-100 µm wide, of long-celled gelatinized
radiating hyphae, branching, with narrow lumina, mostly 1 µm
thick, to 5 µm in length, with +/- fine granules, in outermost layer apical cells
often 1-2 µm long and green-tinted; parathecium 10-20 µm or apparently
lacking; hypothecium 90-100 µm high, colorless; subhymenium 30-40 µm,
colorless; hymenium 50-70 µm colorless; epihymenium 10 µm high,
sordid green, with +/- fine POL+ granules, green pigment diffuse and dissolving in K;
paraphyses colorless, rarely branched, 1-1.5 µm wide, apical lumina usually ca.
1 x 1.5-3.0 µm wide, sometimes with green pigmented caps; asci 20-30 x 10-12
µm; ascospores 8 per ascus, colorless, simple, (11.7)-13.6-(16.2) x
(3.4)-3.8-(4.1) µm (N=16). Pycnidia infrequent, immersed in thallus, walls brown.
Conidia colorless, simple, filiform, slightly curved 13-14 x 1µm. |
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Chemistry: Usnic acid (cortex), zeorin (medulla). Spot tests: K-, C-,
KC+ yellowish, P-, UV-. |
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Type: USA: California: San Luis Obispo Co.: San Simeon
State Park, San Carpoforo Creek, south side, east of Highway 1, near 35° 45' 46" N, 121°
19' 21" W, elev. 6 m., on weathered conifer wood of abandoned corral, 19.vi.2006, K. Knudsen 6467 (UCR, holotype [fertile]; NY, PRM, isotypes [sterile]). |
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The original paper describing the type appeared in Opuscula Philolichenum 6: 73-80 and is available on that publication's web site. |
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Image: J.C. Lendemer. |
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ucr.edu
