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Porpidia speirea (Ach.) Krempelh. (redirected from: Lecidea cinerascens)
Family: Lecideaceae
[Huilia speirea (Ach.) Kremp.,  more]
Porpidia speirea image
Valter Jacinto  
Life habit: lichenized (mutualistic with algal photobionts) thallus: crustose (crustaceous) – episubstratal – unspecified thallus: continuous, diffuse, effuse | granular, granulose, granulate | cracked, fissured, fractured, rimose | compartimentized – areolate, squamulate [th] upper surface: white(ish) | white(ish) brown (beige) [th marginal and upper surface] specific structures: absent [th] morphol substructures (eg areoles, lobes, branches) upper surface: smooth, plane | granulose, granular | verrucose, warted [th] medulla amyloidity: present ascomata: absent | present ascoma: apothecial, apothecioid – hymenial ascoma [mm]: (low) 0.2 (high) 2.0 ascoma: immersed, innate | subsessile, subimmersed, adnate, semi-immersed, emergent [ascm, if apoth] disc, mazaedium: concave | plane, flat, flattened, expanded | subconvex, slightly convex [ascm, if apoth] disc, mazaedium: black(ish) [ascm, if apoth] disc, mazaedium: epruinose | pruinose [ascm, if apoth] margin surface; [if perith] periostiolar area, ostiole, involucrellum: black(ish) [ascm, if apoth] margin excipular photobionts: absent [ascm, if apoth] subhymenial layers, hypothecium; [if perith] basal excipulum: brown(ish) black [ascm] paraphyses/-oids: present [ascm] epihymenium, epithecium: green(ish) brown (olive brown) asci: lecanoralean [asc] tholus: thickened [asc] tholus amyloidity (iodine reaction): present [asc] tholus amyloidity pattern: with amyloid tube, ring (= Collema-, Micarea-, Porpidia-, Psora-types etc) ascospores: (median) 8.0 [asp] shape: ellipsoidal [asp] length [µm]: (low) 12.0 (high) 19.0 [asp] width [µm]: (low) 6.0 (high) 9.0 [asp] septa: absent – spore lumen unilocular, monolocular [asp] pigmentation: hyaline, colourless [asp] perispore, epispore: not apparent | thin, thinly halonate | thick, distincly halonate conidiomata: absent | present conidia: bacilliform, bacillar secondary metabolites: present secondary metabolites: 2'-O-methylmicrophyllinic acid | 2'-O-methylperlatolic acid | confluentic acid primary photobiont: present secondary photobionts (eg in cephalodia): absent primary photobiont: chlorophytaceous – trebouxiaceous, chlorococcoid.

substrate: rock – calcareous, calciferous, basic | rock, stones, pebbles – unspecified.