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Lecanographa hypothallina (Zahlbr.) Egea & Torrente (redirected from: Lecanactis nashii)
Family: Graphidaceae
[Lecanactis nashii Egea & Torrente,  more]
Lecanographa hypothallina image
Stephen Sharnoff  
Thallus: crustose to cushion-like, effuse, cracked or areolate to +verruculose or occasionally bullate or con-volute-rugulose, often very thin but also up to 1.5 mm thick, sometimes delimited by a thin, dark brown, irregular prothallus surface: white to gray or creamy white, smooth or somewhat farinose (pruinose), overlain by an epinecral layer up to 50 µm thick medulla: white, variably thick, composed of mixed and loosely interwoven thin-walled hyphae with many crystals of unknown nature (soluble in K) incorporated among the hyphae Ascomata: numerous, scattered or crowded, rounded (0.25-0.9 mm in diam.) or lirellate (0.8-2 x 0.3-0.6 mm), unbranched, irregularly substellate, at first immersed but then +adnate or sessile, not constricted at base disc: black, plane to convex, whitish or grayish pruinose (C+ red) margin: conspicuous when young, thick, scarcely or not raised above level of disc, covered by +densely white pruina, when old often +excluded exciple: well developed, composed of intertwined, coalescent, dark brown, carbonaceous hyphae, K+ dark green pseudothecium: pale brown, sometimes with a greenish tinge, 25-30 µm thick, gradually paling downward, with pale brown, granular gel, K+ pale olive green, I+ blue, K/I- or + blue in lower part hymenium: hyaline, 55-140 µm tall, I ±pale red K/I+ blue; paraphysoids: 1 µm or less thick below, coherent, sparsely branched and anastomosing, not or slightly widened apically where richly branched, intertwined, brown, 1-2 µm thick, with slightly pigmented walls subhymenium: pale brown, 25-50 µm thick; hypothecium: dark brown-black, carbonaceous, K+ dark olive-green, I-, K/I- asci: clavate to oblong or subcylindrical, I-, K/I+ blue, 50-110 x 13-20 µm, grumulosa-type, with inconspicuous ring, 8-spored ascospores: hyaline, becoming brown only when old, transversely (6-)7(-8)-septate (the locules equal in length), oblong to fusiform, straight or slightly curved, 19-26(-30) x 4-5.5(6) µm, with thin walls and not or slightly widened at the septa, not constricted, surrounded by a thick gelatinous sheath, hyaline but turning brown when old Pycnidia: immersed, dark brown, expanded at tip, secondarily multilocular conidia: hyaline, straight, bacilliform, 5-10 x 1 µm Spot tests: thallus K-, C+ red, KC+ red, P- or P+ pale yellow in parts Secondary metabolites: containing lecanoric and gyrophoric acids, traces of erythrin, and traces of unknowns detected by HPLC but not seen in TLC. Substrate and ecology: on volcanic or calcareous rock, sometimes sandstone, coastal, moderately shaded, usually north-facing, vertical or almost vertical exposures, and underhangs, recesses, small cavities, and roofs of caves, ombrophobic (i.e., in areas sheltered from precipitation) World distribution: western North America (California and Mexico) Sonoran distribution: southern California, Baja California, and Baja California Sur. Notes: Lecanographa hypothallina is a rather variable species. The thallus varies from very thin and areolate to relatively thick and bullate. In some populations, the ascocarps are completely lirelliform, +subsellate, with prominent margin and convex disc; while in others they are +round, immarginate, and with a quite convex disc. The asci and ascospores are also somewhat variable and in some specimens mature asci of 70 x 13 µm and ascospores of 23 x 3.5 µm have been measured. See Egea and Torrente (1989 & 1992) for more details.
Lecanographa hypothallina image
Stephen Sharnoff  
Lecanographa hypothallina image
Stephen Sharnoff  
Lecanographa hypothallina image
Stephen Sharnoff  
Lecanographa hypothallina image
Stephen Sharnoff  
Lecanographa hypothallina image
Lecanographa hypothallina image
Lecanographa hypothallina image
Lecanographa hypothallina image
Lecanographa hypothallina image
Lecanographa hypothallina image
Lecanographa hypothallina image
Lecanographa hypothallina image
Lecanographa hypothallina image
Lecanographa hypothallina image
Lecanographa hypothallina image
Lecanographa hypothallina image
Lecanographa hypothallina image
Lecanographa hypothallina image
Lecanographa hypothallina image
Lecanographa hypothallina image
Lecanographa hypothallina image
Lecanographa hypothallina image
Lecanographa hypothallina image
Lecanographa hypothallina image
Lecanographa hypothallina image
Lecanographa hypothallina image
Lecanographa hypothallina image
Lecanographa hypothallina image
Lecanographa hypothallina image